src/mess/machine/8155pio.c
| r5190 | r5191 | |
| 1 | | /********************************************************************** |
| 2 | | |
| 3 | | 8155 - 2048-Bit Static MOS RAM with I/O Ports and Timer emulation |
| 4 | | |
| 5 | | Copyright MESS Team. |
| 6 | | Visit http://mamedev.org for licensing and usage restrictions. |
| 7 | | |
| 8 | | **********************************************************************/ |
| 9 | | |
| 10 | | /* |
| 11 | | |
| 12 | | TODO: |
| 13 | | |
| 14 | | - strobed mode |
| 15 | | |
| 16 | | */ |
| 17 | | |
| 18 | | #include "8155pio.h" |
| 19 | | |
| 20 | | /*************************************************************************** |
| 21 | | PARAMETERS |
| 22 | | ***************************************************************************/ |
| 23 | | |
| 24 | | #define LOG 0 |
| 25 | | |
| 26 | | enum |
| 27 | | { |
| 28 | | PIO8155_REGISTER_COMMAND = 0, |
| 29 | | PIO8155_REGISTER_STATUS = 0, |
| 30 | | PIO8155_REGISTER_PORT_A, |
| 31 | | PIO8155_REGISTER_PORT_B, |
| 32 | | PIO8155_REGISTER_PORT_C, |
| 33 | | PIO8155_REGISTER_TIMER_LOW, |
| 34 | | PIO8155_REGISTER_TIMER_HIGH |
| 35 | | }; |
| 36 | | |
| 37 | | enum |
| 38 | | { |
| 39 | | PIO8155_PORT_A = 0, |
| 40 | | PIO8155_PORT_B, |
| 41 | | PIO8155_PORT_C, |
| 42 | | PIO8155_PORT_COUNT |
| 43 | | }; |
| 44 | | |
| 45 | | enum |
| 46 | | { |
| 47 | | PIO8155_PORT_MODE_INPUT = 0, |
| 48 | | PIO8155_PORT_MODE_OUTPUT, |
| 49 | | PIO8155_PORT_MODE_STROBED_PORT_A, /* not supported */ |
| 50 | | PIO8155_PORT_MODE_STROBED /* not supported */ |
| 51 | | }; |
| 52 | | |
| 53 | | #define PIO8155_COMMAND_PA 0x01 |
| 54 | | #define PIO8155_COMMAND_PB 0x02 |
| 55 | | #define PIO8155_COMMAND_PC_MASK 0x0c |
| 56 | | #define PIO8155_COMMAND_PC_ALT_1 0x00 |
| 57 | | #define PIO8155_COMMAND_PC_ALT_2 0x0c |
| 58 | | #define PIO8155_COMMAND_PC_ALT_3 0x04 /* not supported */ |
| 59 | | #define PIO8155_COMMAND_PC_ALT_4 0x08 /* not supported */ |
| 60 | | #define PIO8155_COMMAND_IEA 0x10 /* not supported */ |
| 61 | | #define PIO8155_COMMAND_IEB 0x20 /* not supported */ |
| 62 | | #define PIO8155_COMMAND_TM_MASK 0xc0 |
| 63 | | #define PIO8155_COMMAND_TM_NOP 0x00 |
| 64 | | #define PIO8155_COMMAND_TM_STOP 0x40 |
| 65 | | #define PIO8155_COMMAND_TM_STOP_AFTER_TC 0x80 |
| 66 | | #define PIO8155_COMMAND_TM_START 0xc0 |
| 67 | | |
| 68 | | #define PIO8155_STATUS_INTR_A 0x01 /* not supported */ |
| 69 | | #define PIO8155_STATUS_A_BF 0x02 /* not supported */ |
| 70 | | #define PIO8155_STATUS_INTE_A 0x04 /* not supported */ |
| 71 | | #define PIO8155_STATUS_INTR_B 0x08 /* not supported */ |
| 72 | | #define PIO8155_STATUS_B_BF 0x10 /* not supported */ |
| 73 | | #define PIO8155_STATUS_INTE_B 0x20 /* not supported */ |
| 74 | | #define PIO8155_STATUS_TIMER 0x40 |
| 75 | | |
| 76 | | #define PIO8155_TIMER_MODE_MASK 0xc0 |
| 77 | | #define PIO8155_TIMER_MODE_LOW 0x00 |
| 78 | | #define PIO8155_TIMER_MODE_SQUARE_WAVE 0x40 |
| 79 | | #define PIO8155_TIMER_MODE_SINGLE_PULSE 0x80 |
| 80 | | #define PIO8155_TIMER_MODE_AUTOMATIC_RELOAD 0xc0 |
| 81 | | |
| 82 | | /*************************************************************************** |
| 83 | | TYPE DEFINITIONS |
| 84 | | ***************************************************************************/ |
| 85 | | |
| 86 | | typedef struct _pio8155_t pio8155_t; |
| 87 | | struct _pio8155_t |
| 88 | | { |
| 89 | | devcb_resolved_read8 in_port_func[PIO8155_PORT_COUNT]; |
| 90 | | devcb_resolved_write8 out_port_func[PIO8155_PORT_COUNT]; |
| 91 | | devcb_resolved_write_line out_to_func; |
| 92 | | |
| 93 | | /* memory */ |
| 94 | | UINT8 ram[256]; /* RAM */ |
| 95 | | |
| 96 | | /* registers */ |
| 97 | | UINT8 command; /* command register */ |
| 98 | | UINT8 status; /* status register */ |
| 99 | | UINT8 output[3]; /* output latches */ |
| 100 | | |
| 101 | | /* counter */ |
| 102 | | UINT16 count_length; /* count length register */ |
| 103 | | UINT16 counter; /* counter register */ |
| 104 | | int to; /* timer output */ |
| 105 | | |
| 106 | | /* timers */ |
| 107 | | emu_timer *timer; /* counter timer */ |
| 108 | | }; |
| 109 | | |
| 110 | | /*************************************************************************** |
| 111 | | INLINE FUNCTIONS |
| 112 | | ***************************************************************************/ |
| 113 | | |
| 114 | | INLINE pio8155_t *get_safe_token(const device_config *device) |
| 115 | | { |
| 116 | | assert(device != NULL); |
| 117 | | assert(device->token != NULL); |
| 118 | | return (pio8155_t *)device->token; |
| 119 | | } |
| 120 | | |
| 121 | | INLINE const pio8155_interface *get_interface(const device_config *device) |
| 122 | | { |
| 123 | | assert(device != NULL); |
| 124 | | assert(device->type == PIO8155); |
| 125 | | return (const pio8155_interface *) device->static_config; |
| 126 | | } |
| 127 | | |
| 128 | | INLINE UINT8 get_timer_mode(pio8155_t *pio8155) |
| 129 | | { |
| 130 | | return (pio8155->count_length >> 8) & PIO8155_TIMER_MODE_MASK; |
| 131 | | } |
| 132 | | |
| 133 | | INLINE void timer_output(pio8155_t *pio8155) |
| 134 | | { |
| 135 | | devcb_call_write_line(&pio8155->out_to_func, pio8155->to); |
| 136 | | |
| 137 | | if (LOG) logerror("8155 Timer Output: %u\n", pio8155->to); |
| 138 | | } |
| 139 | | |
| 140 | | INLINE void pulse_timer_output(pio8155_t *pio8155) |
| 141 | | { |
| 142 | | pio8155->to = 0; timer_output(pio8155); |
| 143 | | pio8155->to = 1; timer_output(pio8155); |
| 144 | | } |
| 145 | | |
| 146 | | INLINE int get_port_mode(pio8155_t *pio8155, int port) |
| 147 | | { |
| 148 | | int mode = -1; |
| 149 | | |
| 150 | | switch (port) |
| 151 | | { |
| 152 | | case PIO8155_PORT_A: |
| 153 | | mode = (pio8155->command & PIO8155_COMMAND_PA) ? PIO8155_PORT_MODE_OUTPUT : PIO8155_PORT_MODE_INPUT; |
| 154 | | break; |
| 155 | | |
| 156 | | case PIO8155_PORT_B: |
| 157 | | mode = (pio8155->command & PIO8155_COMMAND_PB) ? PIO8155_PORT_MODE_OUTPUT : PIO8155_PORT_MODE_INPUT; |
| 158 | | break; |
| 159 | | |
| 160 | | case PIO8155_PORT_C: |
| 161 | | switch (pio8155->command & PIO8155_COMMAND_PC_MASK) |
| 162 | | { |
| 163 | | case PIO8155_COMMAND_PC_ALT_1: mode = PIO8155_PORT_MODE_INPUT; break; |
| 164 | | case PIO8155_COMMAND_PC_ALT_2: mode = PIO8155_PORT_MODE_OUTPUT; break; |
| 165 | | case PIO8155_COMMAND_PC_ALT_3: mode = PIO8155_PORT_MODE_STROBED_PORT_A; break; |
| 166 | | case PIO8155_COMMAND_PC_ALT_4: mode = PIO8155_PORT_MODE_STROBED; break; |
| 167 | | } |
| 168 | | break; |
| 169 | | } |
| 170 | | |
| 171 | | return mode; |
| 172 | | } |
| 173 | | |
| 174 | | INLINE UINT8 read_port(pio8155_t *pio8155, int port) |
| 175 | | { |
| 176 | | UINT8 data = 0; |
| 177 | | |
| 178 | | switch (port) |
| 179 | | { |
| 180 | | case PIO8155_PORT_A: |
| 181 | | case PIO8155_PORT_B: |
| 182 | | switch (get_port_mode(pio8155, port)) |
| 183 | | { |
| 184 | | case PIO8155_PORT_MODE_INPUT: |
| 185 | | data = devcb_call_read8(&pio8155->in_port_func[port], 0); |
| 186 | | break; |
| 187 | | |
| 188 | | case PIO8155_PORT_MODE_OUTPUT: |
| 189 | | data = pio8155->output[port]; |
| 190 | | break; |
| 191 | | } |
| 192 | | break; |
| 193 | | |
| 194 | | case PIO8155_PORT_C: |
| 195 | | switch (get_port_mode(pio8155, PIO8155_PORT_C)) |
| 196 | | { |
| 197 | | case PIO8155_PORT_MODE_INPUT: |
| 198 | | data = devcb_call_read8(&pio8155->in_port_func[port], 0) & 0x3f; |
| 199 | | break; |
| 200 | | |
| 201 | | case PIO8155_PORT_MODE_OUTPUT: |
| 202 | | data = pio8155->output[port] & 0x3f; |
| 203 | | break; |
| 204 | | |
| 205 | | default: |
| 206 | | logerror("8155 Unsupported Port C mode!\n"); |
| 207 | | } |
| 208 | | break; |
| 209 | | } |
| 210 | | |
| 211 | | return data; |
| 212 | | } |
| 213 | | |
| 214 | | INLINE void write_port(pio8155_t *pio8155, int port, UINT8 data) |
| 215 | | { |
| 216 | | switch (get_port_mode(pio8155, port)) |
| 217 | | { |
| 218 | | case PIO8155_PORT_MODE_OUTPUT: |
| 219 | | pio8155->output[port] = data; |
| 220 | | devcb_call_write8(&pio8155->out_port_func[port], 0, pio8155->output[port]); |
| 221 | | break; |
| 222 | | } |
| 223 | | } |
| 224 | | |
| 225 | | /*************************************************************************** |
| 226 | | IMPLEMENTATION |
| 227 | | ***************************************************************************/ |
| 228 | | |
| 229 | | /*------------------------------------------------- |
| 230 | | TIMER_CALLBACK( counter_tick ) |
| 231 | | -------------------------------------------------*/ |
| 232 | | |
| 233 | | static TIMER_CALLBACK( counter_tick ) |
| 234 | | { |
| 235 | | const device_config *device = ptr; |
| 236 | | pio8155_t *pio8155 = get_safe_token(device); |
| 237 | | |
| 238 | | /* count down */ |
| 239 | | pio8155->counter--; |
| 240 | | |
| 241 | | if (get_timer_mode(pio8155) == PIO8155_TIMER_MODE_LOW) |
| 242 | | { |
| 243 | | /* pulse on every count */ |
| 244 | | pulse_timer_output(pio8155); |
| 245 | | } |
| 246 | | |
| 247 | | if (pio8155->counter == 0) |
| 248 | | { |
| 249 | | if (LOG) logerror("8155 Timer Count Reached\n"); |
| 250 | | |
| 251 | | switch (pio8155->command & PIO8155_COMMAND_TM_MASK) |
| 252 | | { |
| 253 | | case PIO8155_COMMAND_TM_STOP_AFTER_TC: |
| 254 | | /* stop timer */ |
| 255 | | timer_enable(pio8155->timer, 0); |
| 256 | | |
| 257 | | if (LOG) logerror("8155 Timer Stopped\n"); |
| 258 | | break; |
| 259 | | } |
| 260 | | |
| 261 | | switch (get_timer_mode(pio8155)) |
| 262 | | { |
| 263 | | case PIO8155_TIMER_MODE_SQUARE_WAVE: |
| 264 | | /* toggle timer output */ |
| 265 | | pio8155->to = !pio8155->to; |
| 266 | | timer_output(pio8155); |
| 267 | | break; |
| 268 | | |
| 269 | | case PIO8155_TIMER_MODE_SINGLE_PULSE: |
| 270 | | /* single pulse upon TC being reached */ |
| 271 | | pulse_timer_output(pio8155); |
| 272 | | |
| 273 | | /* clear timer mode setting */ |
| 274 | | pio8155->command &= ~PIO8155_COMMAND_TM_MASK; |
| 275 | | break; |
| 276 | | |
| 277 | | case PIO8155_TIMER_MODE_AUTOMATIC_RELOAD: |
| 278 | | /* automatic reload, i.e. single pulse every time TC is reached */ |
| 279 | | pulse_timer_output(pio8155); |
| 280 | | break; |
| 281 | | } |
| 282 | | |
| 283 | | /* set timer flag */ |
| 284 | | pio8155->status |= PIO8155_STATUS_TIMER; |
| 285 | | |
| 286 | | /* reload timer counter */ |
| 287 | | pio8155->counter = pio8155->count_length & 0x3fff; |
| 288 | | } |
| 289 | | } |
| 290 | | |
| 291 | | /*------------------------------------------------- |
| 292 | | pio8155_register_r - register read |
| 293 | | -------------------------------------------------*/ |
| 294 | | |
| 295 | | READ8_DEVICE_HANDLER( pio8155_r ) |
| 296 | | { |
| 297 | | pio8155_t *pio8155 = get_safe_token(device); |
| 298 | | |
| 299 | | UINT8 data = 0; |
| 300 | | |
| 301 | | switch (offset & 0x03) |
| 302 | | { |
| 303 | | case PIO8155_REGISTER_STATUS: |
| 304 | | data = pio8155->status; |
| 305 | | |
| 306 | | /* clear timer flag */ |
| 307 | | pio8155->status &= ~PIO8155_STATUS_TIMER; |
| 308 | | break; |
| 309 | | |
| 310 | | case PIO8155_REGISTER_PORT_A: |
| 311 | | data = read_port(pio8155, PIO8155_PORT_A); |
| 312 | | break; |
| 313 | | |
| 314 | | case PIO8155_REGISTER_PORT_B: |
| 315 | | data = read_port(pio8155, PIO8155_PORT_B); |
| 316 | | break; |
| 317 | | |
| 318 | | case PIO8155_REGISTER_PORT_C: |
| 319 | | data = read_port(pio8155, PIO8155_PORT_C); |
| 320 | | break; |
| 321 | | } |
| 322 | | |
| 323 | | return data; |
| 324 | | } |
| 325 | | |
| 326 | | /*------------------------------------------------- |
| 327 | | pio8155_register_w - register write |
| 328 | | -------------------------------------------------*/ |
| 329 | | |
| 330 | | WRITE8_DEVICE_HANDLER( pio8155_w ) |
| 331 | | { |
| 332 | | pio8155_t *pio8155 = get_safe_token(device); |
| 333 | | |
| 334 | | switch (offset & 0x07) |
| 335 | | { |
| 336 | | case PIO8155_REGISTER_COMMAND: |
| 337 | | pio8155->command = data; |
| 338 | | |
| 339 | | if (LOG) logerror("8155 Port A Mode: %s\n", (data & PIO8155_COMMAND_PA) ? "output" : "input"); |
| 340 | | if (LOG) logerror("8155 Port B Mode: %s\n", (data & PIO8155_COMMAND_PB) ? "output" : "input"); |
| 341 | | |
| 342 | | if (LOG) logerror("8155 Port A Interrupt: %s\n", (data & PIO8155_COMMAND_IEA) ? "enabled" : "disabled"); |
| 343 | | if (LOG) logerror("8155 Port B Interrupt: %s\n", (data & PIO8155_COMMAND_IEB) ? "enabled" : "disabled"); |
| 344 | | |
| 345 | | switch (data & PIO8155_COMMAND_PC_MASK) |
| 346 | | { |
| 347 | | case PIO8155_COMMAND_PC_ALT_1: |
| 348 | | if (LOG) logerror("8155 Port C Mode: Alt 1\n"); |
| 349 | | break; |
| 350 | | |
| 351 | | case PIO8155_COMMAND_PC_ALT_2: |
| 352 | | if (LOG) logerror("8155 Port C Mode: Alt 2\n"); |
| 353 | | break; |
| 354 | | |
| 355 | | case PIO8155_COMMAND_PC_ALT_3: |
| 356 | | if (LOG) logerror("8155 Port C Mode: Alt 3\n"); |
| 357 | | break; |
| 358 | | |
| 359 | | case PIO8155_COMMAND_PC_ALT_4: |
| 360 | | if (LOG) logerror("8155 Port C Mode: Alt 4\n"); |
| 361 | | break; |
| 362 | | } |
| 363 | | |
| 364 | | switch (data & PIO8155_COMMAND_TM_MASK) |
| 365 | | { |
| 366 | | case PIO8155_COMMAND_TM_NOP: |
| 367 | | /* do not affect counter operation */ |
| 368 | | break; |
| 369 | | |
| 370 | | case PIO8155_COMMAND_TM_STOP: |
| 371 | | /* NOP if timer has not started, stop counting if the timer is running */ |
| 372 | | if (LOG) logerror("8155 Timer Command: Stop\n"); |
| 373 | | timer_enable(pio8155->timer, 0); |
| 374 | | break; |
| 375 | | |
| 376 | | case PIO8155_COMMAND_TM_STOP_AFTER_TC: |
| 377 | | /* stop immediately after present TC is reached (NOP if timer has not started) */ |
| 378 | | if (LOG) logerror("8155 Timer Command: Stop after TC\n"); |
| 379 | | break; |
| 380 | | |
| 381 | | case PIO8155_COMMAND_TM_START: |
| 382 | | if (LOG) logerror("8155 Timer Command: Start\n"); |
| 383 | | |
| 384 | | if (timer_enabled(pio8155->timer)) |
| 385 | | { |
| 386 | | /* if timer is running, start the new mode and CNT length immediately after present TC is reached */ |
| 387 | | } |
| 388 | | else |
| 389 | | { |
| 390 | | /* load mode and CNT length and start immediately after loading (if timer is not running) */ |
| 391 | | pio8155->counter = pio8155->count_length; |
| 392 | | timer_adjust_periodic(pio8155->timer, attotime_zero, 0, ATTOTIME_IN_HZ(device->clock)); |
| 393 | | } |
| 394 | | break; |
| 395 | | } |
| 396 | | break; |
| 397 | | |
| 398 | | case PIO8155_REGISTER_PORT_A: |
| 399 | | write_port(pio8155, PIO8155_PORT_A, data); |
| 400 | | break; |
| 401 | | |
| 402 | | case PIO8155_REGISTER_PORT_B: |
| 403 | | write_port(pio8155, PIO8155_PORT_B, data); |
| 404 | | break; |
| 405 | | |
| 406 | | case PIO8155_REGISTER_PORT_C: |
| 407 | | write_port(pio8155, PIO8155_PORT_C, data); |
| 408 | | break; |
| 409 | | |
| 410 | | case PIO8155_REGISTER_TIMER_LOW: |
| 411 | | pio8155->count_length = (pio8155->count_length & 0xff00) | data; |
| 412 | | if (LOG) logerror("8155 Count Length Low: %04x\n", pio8155->count_length); |
| 413 | | break; |
| 414 | | |
| 415 | | case PIO8155_REGISTER_TIMER_HIGH: |
| 416 | | pio8155->count_length = (data << 8) | (pio8155->count_length & 0xff); |
| 417 | | if (LOG) logerror("8155 Count Length High: %04x\n", pio8155->count_length); |
| 418 | | |
| 419 | | switch (data & PIO8155_TIMER_MODE_MASK) |
| 420 | | { |
| 421 | | case PIO8155_TIMER_MODE_LOW: |
| 422 | | /* puts out LOW during second half of count */ |
| 423 | | if (LOG) logerror("8155 Timer Mode: LOW\n"); |
| 424 | | break; |
| 425 | | |
| 426 | | case PIO8155_TIMER_MODE_SQUARE_WAVE: |
| 427 | | /* square wave, i.e. the period of the square wave equals the count length programmed with automatic reload at terminal count */ |
| 428 | | if (LOG) logerror("8155 Timer Mode: Square wave\n"); |
| 429 | | break; |
| 430 | | |
| 431 | | case PIO8155_TIMER_MODE_SINGLE_PULSE: |
| 432 | | /* single pulse upon TC being reached */ |
| 433 | | if (LOG) logerror("8155 Timer Mode: Single pulse\n"); |
| 434 | | break; |
| 435 | | |
| 436 | | case PIO8155_TIMER_MODE_AUTOMATIC_RELOAD: |
| 437 | | /* automatic reload, i.e. single pulse every time TC is reached */ |
| 438 | | if (LOG) logerror("8155 Timer Mode: Automatic reload\n"); |
| 439 | | break; |
| 440 | | } |
| 441 | | break; |
| 442 | | } |
| 443 | | } |
| 444 | | |
| 445 | | /*------------------------------------------------- |
| 446 | | pio8155_ram_r - memory read |
| 447 | | -------------------------------------------------*/ |
| 448 | | |
| 449 | | READ8_DEVICE_HANDLER( pio8155_ram_r ) |
| 450 | | { |
| 451 | | pio8155_t *pio8155 = get_safe_token(device); |
| 452 | | |
| 453 | | return pio8155->ram[offset & 0xff]; |
| 454 | | } |
| 455 | | |
| 456 | | /*------------------------------------------------- |
| 457 | | pio8155_ram_w - memory write |
| 458 | | -------------------------------------------------*/ |
| 459 | | |
| 460 | | WRITE8_DEVICE_HANDLER( pio8155_ram_w ) |
| 461 | | { |
| 462 | | pio8155_t *pio8155 = get_safe_token(device); |
| 463 | | |
| 464 | | pio8155->ram[offset & 0xff] = data; |
| 465 | | } |
| 466 | | |
| 467 | | /*------------------------------------------------- |
| 468 | | DEVICE_START( pio8155 ) |
| 469 | | -------------------------------------------------*/ |
| 470 | | |
| 471 | | static DEVICE_START( pio8155 ) |
| 472 | | { |
| 473 | | pio8155_t *pio8155 = device->token; |
| 474 | | const pio8155_interface *intf = get_interface(device); |
| 475 | | |
| 476 | | /* resolve callbacks */ |
| 477 | | devcb_resolve_read8(&pio8155->in_port_func[0], &intf->in_pa_func, device); |
| 478 | | devcb_resolve_read8(&pio8155->in_port_func[1], &intf->in_pb_func, device); |
| 479 | | devcb_resolve_read8(&pio8155->in_port_func[2], &intf->in_pc_func, device); |
| 480 | | devcb_resolve_write8(&pio8155->out_port_func[0], &intf->out_pa_func, device); |
| 481 | | devcb_resolve_write8(&pio8155->out_port_func[1], &intf->out_pb_func, device); |
| 482 | | devcb_resolve_write8(&pio8155->out_port_func[2], &intf->out_pc_func, device); |
| 483 | | devcb_resolve_write_line(&pio8155->out_to_func, &intf->out_to_func, device); |
| 484 | | |
| 485 | | /* create the timers */ |
| 486 | | pio8155->timer = timer_alloc(device->machine, counter_tick, (void *)device); |
| 487 | | |
| 488 | | /* register for state saving */ |
| 489 | | state_save_register_device_item(device, 0, pio8155->command); |
| 490 | | state_save_register_device_item(device, 0, pio8155->status); |
| 491 | | state_save_register_device_item_array(device, 0, pio8155->output); |
| 492 | | state_save_register_device_item(device, 0, pio8155->count_length); |
| 493 | | state_save_register_device_item(device, 0, pio8155->counter); |
| 494 | | state_save_register_device_item_array(device, 0, pio8155->ram); |
| 495 | | state_save_register_device_item(device, 0, pio8155->to); |
| 496 | | } |
| 497 | | |
| 498 | | /*------------------------------------------------- |
| 499 | | DEVICE_RESET( pio8155 ) |
| 500 | | -------------------------------------------------*/ |
| 501 | | |
| 502 | | static DEVICE_RESET( pio8155 ) |
| 503 | | { |
| 504 | | pio8155_t *pio8155 = device->token; |
| 505 | | |
| 506 | | /* clear output registers */ |
| 507 | | pio8155->output[PIO8155_PORT_A] = 0; |
| 508 | | pio8155->output[PIO8155_PORT_B] = 0; |
| 509 | | pio8155->output[PIO8155_PORT_C] = 0; |
| 510 | | |
| 511 | | /* set ports to input mode */ |
| 512 | | pio8155_w(device, PIO8155_REGISTER_COMMAND, pio8155->command & ~(PIO8155_COMMAND_PA | PIO8155_COMMAND_PB | PIO8155_COMMAND_PC_MASK)); |
| 513 | | |
| 514 | | /* clear timer flag */ |
| 515 | | pio8155->status &= ~PIO8155_STATUS_TIMER; |
| 516 | | |
| 517 | | /* stop counting */ |
| 518 | | timer_enable(pio8155->timer, 0); |
| 519 | | |
| 520 | | /* clear timer output */ |
| 521 | | pio8155->to = 1; |
| 522 | | timer_output(pio8155); |
| 523 | | } |
| 524 | | |
| 525 | | /*------------------------------------------------- |
| 526 | | DEVICE_GET_INFO( pio8155 ) |
| 527 | | -------------------------------------------------*/ |
| 528 | | |
| 529 | | DEVICE_GET_INFO( pio8155 ) |
| 530 | | { |
| 531 | | switch (state) |
| 532 | | { |
| 533 | | /* --- the following bits of info are returned as 64-bit signed integers --- */ |
| 534 | | case DEVINFO_INT_INLINE_CONFIG_BYTES: info->i = 0; break; |
| 535 | | case DEVINFO_INT_CLASS: info->i = DEVICE_CLASS_PERIPHERAL; break; |
| 536 | | case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(pio8155_t); break; |
| 537 | | |
| 538 | | /* --- the following bits of info are returned as pointers to data or functions --- */ |
| 539 | | case DEVINFO_FCT_START: info->start = DEVICE_START_NAME(pio8155); break; |
| 540 | | case DEVINFO_FCT_STOP: /* Nothing */ break; |
| 541 | | case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME(pio8155); break; |
| 542 | | |
| 543 | | /* --- the following bits of info are returned as NULL-terminated strings --- */ |
| 544 | | case DEVINFO_STR_NAME: strcpy(info->s, "OKI MSM81C55"); break; |
| 545 | | case DEVINFO_STR_FAMILY: strcpy(info->s, "8155"); break; |
| 546 | | case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break; |
| 547 | | case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break; |
| 548 | | case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright the MESS Team"); break; |
| 549 | | } |
| 550 | | } |
src/mess/machine/i8155.c
| r0 | r5191 | |
| 1 | /********************************************************************** |
| 2 | |
| 3 | Intel 8155 - 2048-Bit Static MOS RAM with I/O Ports and Timer emulation |
| 4 | |
| 5 | Copyright MESS Team. |
| 6 | Visit http://mamedev.org for licensing and usage restrictions. |
| 7 | |
| 8 | **********************************************************************/ |
| 9 | |
| 10 | /* |
| 11 | |
| 12 | TODO: |
| 13 | |
| 14 | - strobed mode |
| 15 | |
| 16 | */ |
| 17 | |
| 18 | #include "i8155.h" |
| 19 | |
| 20 | /*************************************************************************** |
| 21 | PARAMETERS |
| 22 | ***************************************************************************/ |
| 23 | |
| 24 | #define LOG 0 |
| 25 | |
| 26 | enum |
| 27 | { |
| 28 | I8155_REGISTER_COMMAND = 0, |
| 29 | I8155_REGISTER_STATUS = 0, |
| 30 | I8155_REGISTER_PORT_A, |
| 31 | I8155_REGISTER_PORT_B, |
| 32 | I8155_REGISTER_PORT_C, |
| 33 | I8155_REGISTER_TIMER_LOW, |
| 34 | I8155_REGISTER_TIMER_HIGH |
| 35 | }; |
| 36 | |
| 37 | enum |
| 38 | { |
| 39 | I8155_PORT_A = 0, |
| 40 | I8155_PORT_B, |
| 41 | I8155_PORT_C, |
| 42 | I8155_PORT_COUNT |
| 43 | }; |
| 44 | |
| 45 | enum |
| 46 | { |
| 47 | I8155_PORT_MODE_INPUT = 0, |
| 48 | I8155_PORT_MODE_OUTPUT, |
| 49 | I8155_PORT_MODE_STROBED_PORT_A, /* not supported */ |
| 50 | I8155_PORT_MODE_STROBED /* not supported */ |
| 51 | }; |
| 52 | |
| 53 | #define I8155_COMMAND_PA 0x01 |
| 54 | #define I8155_COMMAND_PB 0x02 |
| 55 | #define I8155_COMMAND_PC_MASK 0x0c |
| 56 | #define I8155_COMMAND_PC_ALT_1 0x00 |
| 57 | #define I8155_COMMAND_PC_ALT_2 0x0c |
| 58 | #define I8155_COMMAND_PC_ALT_3 0x04 /* not supported */ |
| 59 | #define I8155_COMMAND_PC_ALT_4 0x08 /* not supported */ |
| 60 | #define I8155_COMMAND_IEA 0x10 /* not supported */ |
| 61 | #define I8155_COMMAND_IEB 0x20 /* not supported */ |
| 62 | #define I8155_COMMAND_TM_MASK 0xc0 |
| 63 | #define I8155_COMMAND_TM_NOP 0x00 |
| 64 | #define I8155_COMMAND_TM_STOP 0x40 |
| 65 | #define I8155_COMMAND_TM_STOP_AFTER_TC 0x80 |
| 66 | #define I8155_COMMAND_TM_START 0xc0 |
| 67 | |
| 68 | #define I8155_STATUS_INTR_A 0x01 /* not supported */ |
| 69 | #define I8155_STATUS_A_BF 0x02 /* not supported */ |
| 70 | #define I8155_STATUS_INTE_A 0x04 /* not supported */ |
| 71 | #define I8155_STATUS_INTR_B 0x08 /* not supported */ |
| 72 | #define I8155_STATUS_B_BF 0x10 /* not supported */ |
| 73 | #define I8155_STATUS_INTE_B 0x20 /* not supported */ |
| 74 | #define I8155_STATUS_TIMER 0x40 |
| 75 | |
| 76 | #define I8155_TIMER_MODE_MASK 0xc0 |
| 77 | #define I8155_TIMER_MODE_LOW 0x00 |
| 78 | #define I8155_TIMER_MODE_SQUARE_WAVE 0x40 |
| 79 | #define I8155_TIMER_MODE_SINGLE_PULSE 0x80 |
| 80 | #define I8155_TIMER_MODE_AUTOMATIC_RELOAD 0xc0 |
| 81 | |
| 82 | /*************************************************************************** |
| 83 | TYPE DEFINITIONS |
| 84 | ***************************************************************************/ |
| 85 | |
| 86 | typedef struct _i8155_t i8155_t; |
| 87 | struct _i8155_t |
| 88 | { |
| 89 | devcb_resolved_read8 in_port_func[I8155_PORT_COUNT]; |
| 90 | devcb_resolved_write8 out_port_func[I8155_PORT_COUNT]; |
| 91 | devcb_resolved_write_line out_to_func; |
| 92 | |
| 93 | /* memory */ |
| 94 | UINT8 ram[256]; /* RAM */ |
| 95 | |
| 96 | /* registers */ |
| 97 | UINT8 command; /* command register */ |
| 98 | UINT8 status; /* status register */ |
| 99 | UINT8 output[3]; /* output latches */ |
| 100 | |
| 101 | /* counter */ |
| 102 | UINT16 count_length; /* count length register */ |
| 103 | UINT16 counter; /* counter register */ |
| 104 | int to; /* timer output */ |
| 105 | |
| 106 | /* timers */ |
| 107 | emu_timer *timer; /* counter timer */ |
| 108 | }; |
| 109 | |
| 110 | /*************************************************************************** |
| 111 | INLINE FUNCTIONS |
| 112 | ***************************************************************************/ |
| 113 | |
| 114 | INLINE i8155_t *get_safe_token(const device_config *device) |
| 115 | { |
| 116 | assert(device != NULL); |
| 117 | assert(device->token != NULL); |
| 118 | return (i8155_t *)device->token; |
| 119 | } |
| 120 | |
| 121 | INLINE const i8155_interface *get_interface(const device_config *device) |
| 122 | { |
| 123 | assert(device != NULL); |
| 124 | assert(device->type == I8155); |
| 125 | return (const i8155_interface *) device->static_config; |
| 126 | } |
| 127 | |
| 128 | INLINE UINT8 get_timer_mode(i8155_t *i8155) |
| 129 | { |
| 130 | return (i8155->count_length >> 8) & I8155_TIMER_MODE_MASK; |
| 131 | } |
| 132 | |
| 133 | INLINE void timer_output(i8155_t *i8155) |
| 134 | { |
| 135 | devcb_call_write_line(&i8155->out_to_func, i8155->to); |
| 136 | |
| 137 | if (LOG) logerror("8155 Timer Output: %u\n", i8155->to); |
| 138 | } |
| 139 | |
| 140 | INLINE void pulse_timer_output(i8155_t *i8155) |
| 141 | { |
| 142 | i8155->to = 0; timer_output(i8155); |
| 143 | i8155->to = 1; timer_output(i8155); |
| 144 | } |
| 145 | |
| 146 | INLINE int get_port_mode(i8155_t *i8155, int port) |
| 147 | { |
| 148 | int mode = -1; |
| 149 | |
| 150 | switch (port) |
| 151 | { |
| 152 | case I8155_PORT_A: |
| 153 | mode = (i8155->command & I8155_COMMAND_PA) ? I8155_PORT_MODE_OUTPUT : I8155_PORT_MODE_INPUT; |
| 154 | break; |
| 155 | |
| 156 | case I8155_PORT_B: |
| 157 | mode = (i8155->command & I8155_COMMAND_PB) ? I8155_PORT_MODE_OUTPUT : I8155_PORT_MODE_INPUT; |
| 158 | break; |
| 159 | |
| 160 | case I8155_PORT_C: |
| 161 | switch (i8155->command & I8155_COMMAND_PC_MASK) |
| 162 | { |
| 163 | case I8155_COMMAND_PC_ALT_1: mode = I8155_PORT_MODE_INPUT; break; |
| 164 | case I8155_COMMAND_PC_ALT_2: mode = I8155_PORT_MODE_OUTPUT; break; |
| 165 | case I8155_COMMAND_PC_ALT_3: mode = I8155_PORT_MODE_STROBED_PORT_A; break; |
| 166 | case I8155_COMMAND_PC_ALT_4: mode = I8155_PORT_MODE_STROBED; break; |
| 167 | } |
| 168 | break; |
| 169 | } |
| 170 | |
| 171 | return mode; |
| 172 | } |
| 173 | |
| 174 | INLINE UINT8 read_port(i8155_t *i8155, int port) |
| 175 | { |
| 176 | UINT8 data = 0; |
| 177 | |
| 178 | switch (port) |
| 179 | { |
| 180 | case I8155_PORT_A: |
| 181 | case I8155_PORT_B: |
| 182 | switch (get_port_mode(i8155, port)) |
| 183 | { |
| 184 | case I8155_PORT_MODE_INPUT: |
| 185 | data = devcb_call_read8(&i8155->in_port_func[port], 0); |
| 186 | break; |
| 187 | |
| 188 | case I8155_PORT_MODE_OUTPUT: |
| 189 | data = i8155->output[port]; |
| 190 | break; |
| 191 | } |
| 192 | break; |
| 193 | |
| 194 | case I8155_PORT_C: |
| 195 | switch (get_port_mode(i8155, I8155_PORT_C)) |
| 196 | { |
| 197 | case I8155_PORT_MODE_INPUT: |
| 198 | data = devcb_call_read8(&i8155->in_port_func[port], 0) & 0x3f; |
| 199 | break; |
| 200 | |
| 201 | case I8155_PORT_MODE_OUTPUT: |
| 202 | data = i8155->output[port] & 0x3f; |
| 203 | break; |
| 204 | |
| 205 | default: |
| 206 | logerror("8155 Unsupported Port C mode!\n"); |
| 207 | } |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | return data; |
| 212 | } |
| 213 | |
| 214 | INLINE void write_port(i8155_t *i8155, int port, UINT8 data) |
| 215 | { |
| 216 | switch (get_port_mode(i8155, port)) |
| 217 | { |
| 218 | case I8155_PORT_MODE_OUTPUT: |
| 219 | i8155->output[port] = data; |
| 220 | devcb_call_write8(&i8155->out_port_func[port], 0, i8155->output[port]); |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | /*************************************************************************** |
| 226 | IMPLEMENTATION |
| 227 | ***************************************************************************/ |
| 228 | |
| 229 | /*------------------------------------------------- |
| 230 | TIMER_CALLBACK( counter_tick ) |
| 231 | -------------------------------------------------*/ |
| 232 | |
| 233 | static TIMER_CALLBACK( counter_tick ) |
| 234 | { |
| 235 | const device_config *device = ptr; |
| 236 | i8155_t *i8155 = get_safe_token(device); |
| 237 | |
| 238 | /* count down */ |
| 239 | i8155->counter--; |
| 240 | |
| 241 | if (get_timer_mode(i8155) == I8155_TIMER_MODE_LOW) |
| 242 | { |
| 243 | /* pulse on every count */ |
| 244 | pulse_timer_output(i8155); |
| 245 | } |
| 246 | |
| 247 | if (i8155->counter == 0) |
| 248 | { |
| 249 | if (LOG) logerror("8155 Timer Count Reached\n"); |
| 250 | |
| 251 | switch (i8155->command & I8155_COMMAND_TM_MASK) |
| 252 | { |
| 253 | case I8155_COMMAND_TM_STOP_AFTER_TC: |
| 254 | /* stop timer */ |
| 255 | timer_enable(i8155->timer, 0); |
| 256 | |
| 257 | if (LOG) logerror("8155 Timer Stopped\n"); |
| 258 | break; |
| 259 | } |
| 260 | |
| 261 | switch (get_timer_mode(i8155)) |
| 262 | { |
| 263 | case I8155_TIMER_MODE_SQUARE_WAVE: |
| 264 | /* toggle timer output */ |
| 265 | i8155->to = !i8155->to; |
| 266 | timer_output(i8155); |
| 267 | break; |
| 268 | |
| 269 | case I8155_TIMER_MODE_SINGLE_PULSE: |
| 270 | /* single pulse upon TC being reached */ |
| 271 | pulse_timer_output(i8155); |
| 272 | |
| 273 | /* clear timer mode setting */ |
| 274 | i8155->command &= ~I8155_COMMAND_TM_MASK; |
| 275 | break; |
| 276 | |
| 277 | case I8155_TIMER_MODE_AUTOMATIC_RELOAD: |
| 278 | /* automatic reload, i.e. single pulse every time TC is reached */ |
| 279 | pulse_timer_output(i8155); |
| 280 | break; |
| 281 | } |
| 282 | |
| 283 | /* set timer flag */ |
| 284 | i8155->status |= I8155_STATUS_TIMER; |
| 285 | |
| 286 | /* reload timer counter */ |
| 287 | i8155->counter = i8155->count_length & 0x3fff; |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | /*------------------------------------------------- |
| 292 | i8155_register_r - register read |
| 293 | -------------------------------------------------*/ |
| 294 | |
| 295 | READ8_DEVICE_HANDLER( i8155_r ) |
| 296 | { |
| 297 | i8155_t *i8155 = get_safe_token(device); |
| 298 | |
| 299 | UINT8 data = 0; |
| 300 | |
| 301 | switch (offset & 0x03) |
| 302 | { |
| 303 | case I8155_REGISTER_STATUS: |
| 304 | data = i8155->status; |
| 305 | |
| 306 | /* clear timer flag */ |
| 307 | i8155->status &= ~I8155_STATUS_TIMER; |
| 308 | break; |
| 309 | |
| 310 | case I8155_REGISTER_PORT_A: |
| 311 | data = read_port(i8155, I8155_PORT_A); |
| 312 | break; |
| 313 | |
| 314 | case I8155_REGISTER_PORT_B: |
| 315 | data = read_port(i8155, I8155_PORT_B); |
| 316 | break; |
| 317 | |
| 318 | case I8155_REGISTER_PORT_C: |
| 319 | data = read_port(i8155, I8155_PORT_C); |
| 320 | break; |
| 321 | } |
| 322 | |
| 323 | return data; |
| 324 | } |
| 325 | |
| 326 | /*------------------------------------------------- |
| 327 | i8155_register_w - register write |
| 328 | -------------------------------------------------*/ |
| 329 | |
| 330 | WRITE8_DEVICE_HANDLER( i8155_w ) |
| 331 | { |
| 332 | i8155_t *i8155 = get_safe_token(device); |
| 333 | |
| 334 | switch (offset & 0x07) |
| 335 | { |
| 336 | case I8155_REGISTER_COMMAND: |
| 337 | i8155->command = data; |
| 338 | |
| 339 | if (LOG) logerror("8155 Port A Mode: %s\n", (data & I8155_COMMAND_PA) ? "output" : "input"); |
| 340 | if (LOG) logerror("8155 Port B Mode: %s\n", (data & I8155_COMMAND_PB) ? "output" : "input"); |
| 341 | |
| 342 | if (LOG) logerror("8155 Port A Interrupt: %s\n", (data & I8155_COMMAND_IEA) ? "enabled" : "disabled"); |
| 343 | if (LOG) logerror("8155 Port B Interrupt: %s\n", (data & I8155_COMMAND_IEB) ? "enabled" : "disabled"); |
| 344 | |
| 345 | switch (data & I8155_COMMAND_PC_MASK) |
| 346 | { |
| 347 | case I8155_COMMAND_PC_ALT_1: |
| 348 | if (LOG) logerror("8155 Port C Mode: Alt 1\n"); |
| 349 | break; |
| 350 | |
| 351 | case I8155_COMMAND_PC_ALT_2: |
| 352 | if (LOG) logerror("8155 Port C Mode: Alt 2\n"); |
| 353 | break; |
| 354 | |
| 355 | case I8155_COMMAND_PC_ALT_3: |
| 356 | if (LOG) logerror("8155 Port C Mode: Alt 3\n"); |
| 357 | break; |
| 358 | |
| 359 | case I8155_COMMAND_PC_ALT_4: |
| 360 | if (LOG) logerror("8155 Port C Mode: Alt 4\n"); |
| 361 | break; |
| 362 | } |
| 363 | |
| 364 | switch (data & I8155_COMMAND_TM_MASK) |
| 365 | { |
| 366 | case I8155_COMMAND_TM_NOP: |
| 367 | /* do not affect counter operation */ |
| 368 | break; |
| 369 | |
| 370 | case I8155_COMMAND_TM_STOP: |
| 371 | /* NOP if timer has not started, stop counting if the timer is running */ |
| 372 | if (LOG) logerror("8155 Timer Command: Stop\n"); |
| 373 | timer_enable(i8155->timer, 0); |
| 374 | break; |
| 375 | |
| 376 | case I8155_COMMAND_TM_STOP_AFTER_TC: |
| 377 | /* stop immediately after present TC is reached (NOP if timer has not started) */ |
| 378 | if (LOG) logerror("8155 Timer Command: Stop after TC\n"); |
| 379 | break; |
| 380 | |
| 381 | case I8155_COMMAND_TM_START: |
| 382 | if (LOG) logerror("8155 Timer Command: Start\n"); |
| 383 | |
| 384 | if (timer_enabled(i8155->timer)) |
| 385 | { |
| 386 | /* if timer is running, start the new mode and CNT length immediately after present TC is reached */ |
| 387 | } |
| 388 | else |
| 389 | { |
| 390 | /* load mode and CNT length and start immediately after loading (if timer is not running) */ |
| 391 | i8155->counter = i8155->count_length; |
| 392 | timer_adjust_periodic(i8155->timer, attotime_zero, 0, ATTOTIME_IN_HZ(device->clock)); |
| 393 | } |
| 394 | break; |
| 395 | } |
| 396 | break; |
| 397 | |
| 398 | case I8155_REGISTER_PORT_A: |
| 399 | write_port(i8155, I8155_PORT_A, data); |
| 400 | break; |
| 401 | |
| 402 | case I8155_REGISTER_PORT_B: |
| 403 | write_port(i8155, I8155_PORT_B, data); |
| 404 | break; |
| 405 | |
| 406 | case I8155_REGISTER_PORT_C: |
| 407 | write_port(i8155, I8155_PORT_C, data); |
| 408 | break; |
| 409 | |
| 410 | case I8155_REGISTER_TIMER_LOW: |
| 411 | i8155->count_length = (i8155->count_length & 0xff00) | data; |
| 412 | if (LOG) logerror("8155 Count Length Low: %04x\n", i8155->count_length); |
| 413 | break; |
| 414 | |
| 415 | case I8155_REGISTER_TIMER_HIGH: |
| 416 | i8155->count_length = (data << 8) | (i8155->count_length & 0xff); |
| 417 | if (LOG) logerror("8155 Count Length High: %04x\n", i8155->count_length); |
| 418 | |
| 419 | switch (data & I8155_TIMER_MODE_MASK) |
| 420 | { |
| 421 | case I8155_TIMER_MODE_LOW: |
| 422 | /* puts out LOW during second half of count */ |
| 423 | if (LOG) logerror("8155 Timer Mode: LOW\n"); |
| 424 | break; |
| 425 | |
| 426 | case I8155_TIMER_MODE_SQUARE_WAVE: |
| 427 | /* square wave, i.e. the period of the square wave equals the count length programmed with automatic reload at terminal count */ |
| 428 | if (LOG) logerror("8155 Timer Mode: Square wave\n"); |
| 429 | break; |
| 430 | |
| 431 | case I8155_TIMER_MODE_SINGLE_PULSE: |
| 432 | /* single pulse upon TC being reached */ |
| 433 | if (LOG) logerror("8155 Timer Mode: Single pulse\n"); |
| 434 | break; |
| 435 | |
| 436 | case I8155_TIMER_MODE_AUTOMATIC_RELOAD: |
| 437 | /* automatic reload, i.e. single pulse every time TC is reached */ |
| 438 | if (LOG) logerror("8155 Timer Mode: Automatic reload\n"); |
| 439 | break; |
| 440 | } |
| 441 | break; |
| 442 | } |
| 443 | } |
| 444 | |
| 445 | /*------------------------------------------------- |
| 446 | i8155_ram_r - memory read |
| 447 | -------------------------------------------------*/ |
| 448 | |
| 449 | READ8_DEVICE_HANDLER( i8155_ram_r ) |
| 450 | { |
| 451 | i8155_t *i8155 = get_safe_token(device); |
| 452 | |
| 453 | return i8155->ram[offset & 0xff]; |
| 454 | } |
| 455 | |
| 456 | /*------------------------------------------------- |
| 457 | i8155_ram_w - memory write |
| 458 | -------------------------------------------------*/ |
| 459 | |
| 460 | WRITE8_DEVICE_HANDLER( i8155_ram_w ) |
| 461 | { |
| 462 | i8155_t *i8155 = get_safe_token(device); |
| 463 | |
| 464 | i8155->ram[offset & 0xff] = data; |
| 465 | } |
| 466 | |
| 467 | /*------------------------------------------------- |
| 468 | DEVICE_START( i8155 ) |
| 469 | -------------------------------------------------*/ |
| 470 | |
| 471 | static DEVICE_START( i8155 ) |
| 472 | { |
| 473 | i8155_t *i8155 = device->token; |
| 474 | const i8155_interface *intf = get_interface(device); |
| 475 | |
| 476 | /* resolve callbacks */ |
| 477 | devcb_resolve_read8(&i8155->in_port_func[0], &intf->in_pa_func, device); |
| 478 | devcb_resolve_read8(&i8155->in_port_func[1], &intf->in_pb_func, device); |
| 479 | devcb_resolve_read8(&i8155->in_port_func[2], &intf->in_pc_func, device); |
| 480 | devcb_resolve_write8(&i8155->out_port_func[0], &intf->out_pa_func, device); |
| 481 | devcb_resolve_write8(&i8155->out_port_func[1], &intf->out_pb_func, device); |
| 482 | devcb_resolve_write8(&i8155->out_port_func[2], &intf->out_pc_func, device); |
| 483 | devcb_resolve_write_line(&i8155->out_to_func, &intf->out_to_func, device); |
| 484 | |
| 485 | /* create the timers */ |
| 486 | i8155->timer = timer_alloc(device->machine, counter_tick, (void *)device); |
| 487 | |
| 488 | /* register for state saving */ |
| 489 | state_save_register_device_item(device, 0, i8155->command); |
| 490 | state_save_register_device_item(device, 0, i8155->status); |
| 491 | state_save_register_device_item_array(device, 0, i8155->output); |
| 492 | state_save_register_device_item(device, 0, i8155->count_length); |
| 493 | state_save_register_device_item(device, 0, i8155->counter); |
| 494 | state_save_register_device_item_array(device, 0, i8155->ram); |
| 495 | state_save_register_device_item(device, 0, i8155->to); |
| 496 | } |
| 497 | |
| 498 | /*------------------------------------------------- |
| 499 | DEVICE_RESET( i8155 ) |
| 500 | -------------------------------------------------*/ |
| 501 | |
| 502 | static DEVICE_RESET( i8155 ) |
| 503 | { |
| 504 | i8155_t *i8155 = device->token; |
| 505 | |
| 506 | /* clear output registers */ |
| 507 | i8155->output[I8155_PORT_A] = 0; |
| 508 | i8155->output[I8155_PORT_B] = 0; |
| 509 | i8155->output[I8155_PORT_C] = 0; |
| 510 | |
| 511 | /* set ports to input mode */ |
| 512 | i8155_w(device, I8155_REGISTER_COMMAND, i8155->command & ~(I8155_COMMAND_PA | I8155_COMMAND_PB | I8155_COMMAND_PC_MASK)); |
| 513 | |
| 514 | /* clear timer flag */ |
| 515 | i8155->status &= ~I8155_STATUS_TIMER; |
| 516 | |
| 517 | /* stop counting */ |
| 518 | timer_enable(i8155->timer, 0); |
| 519 | |
| 520 | /* clear timer output */ |
| 521 | i8155->to = 1; |
| 522 | timer_output(i8155); |
| 523 | } |
| 524 | |
| 525 | /*------------------------------------------------- |
| 526 | DEVICE_GET_INFO( i8155 ) |
| 527 | -------------------------------------------------*/ |
| 528 | |
| 529 | DEVICE_GET_INFO( i8155 ) |
| 530 | { |
| 531 | switch (state) |
| 532 | { |
| 533 | /* --- the following bits of info are returned as 64-bit signed integers --- */ |
| 534 | case DEVINFO_INT_INLINE_CONFIG_BYTES: info->i = 0; break; |
| 535 | case DEVINFO_INT_CLASS: info->i = DEVICE_CLASS_PERIPHERAL; break; |
| 536 | case DEVINFO_INT_TOKEN_BYTES: info->i = sizeof(i8155_t); break; |
| 537 | |
| 538 | /* --- the following bits of info are returned as pointers to data or functions --- */ |
| 539 | case DEVINFO_FCT_START: info->start = DEVICE_START_NAME(i8155); break; |
| 540 | case DEVINFO_FCT_STOP: /* Nothing */ break; |
| 541 | case DEVINFO_FCT_RESET: info->reset = DEVICE_RESET_NAME(i8155); break; |
| 542 | |
| 543 | /* --- the following bits of info are returned as NULL-terminated strings --- */ |
| 544 | case DEVINFO_STR_NAME: strcpy(info->s, "Intel 8155"); break; |
| 545 | case DEVINFO_STR_FAMILY: strcpy(info->s, "Intel 8085"); break; |
| 546 | case DEVINFO_STR_VERSION: strcpy(info->s, "1.0"); break; |
| 547 | case DEVINFO_STR_SOURCE_FILE: strcpy(info->s, __FILE__); break; |
| 548 | case DEVINFO_STR_CREDITS: strcpy(info->s, "Copyright the MESS Team"); break; |
| 549 | } |
| 550 | } |
src/mess/drivers/kyocera.c
| r5190 | r5191 | |
| 75 | 75 | #include "devices/cassette.h" |
| 76 | 76 | #include "machine/ctronics.h" |
| 77 | 77 | #include "machine/upd1990a.h" |
| 78 | | #include "machine/8155pio.h" |
| 78 | #include "machine/i8155.h" |
| 79 | 79 | #include "machine/rp5c01a.h" |
| 80 | 80 | #include "machine/msm8251.h" |
| 81 | 81 | #include "video/hd61830.h" |
| r5190 | r5191 | |
| 499 | 499 | // AM_RANGE(0x80, 0x80) AM_MIRROR(0x0f) optional I/O controller unit |
| 500 | 500 | // AM_RANGE(0x90, 0x90) AM_MIRROR(0x0f) optional answering telephone unit |
| 501 | 501 | // AM_RANGE(0xa0, 0xa0) AM_MIRROR(0x0f) optional modem |
| 502 | | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(PIO8155_TAG, pio8155_r, pio8155_w) |
| 502 | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(I8155_TAG, i8155_r, i8155_w) |
| 503 | 503 | // AM_RANGE(0xc0, 0xc0) AM_MIRROR(0x0f) AM_DEVREADWRITE(IM6402_TAG, im6402_data_r, im6402_data_w) |
| 504 | 504 | AM_RANGE(0xd0, 0xd0) AM_MIRROR(0x0f) AM_READWRITE(uart_status_r, uart_ctrl_w) |
| 505 | 505 | AM_RANGE(0xe0, 0xe0) AM_MIRROR(0x0f) AM_READWRITE(keyboard_r, kc85_ctrl_w) |
| r5190 | r5191 | |
| 513 | 513 | // AM_RANGE(0x80, 0x80) AM_MIRROR(0x0f) optional I/O controller unit |
| 514 | 514 | // AM_RANGE(0x90, 0x90) AM_MIRROR(0x0f) optional answering telephone unit |
| 515 | 515 | AM_RANGE(0xa0, 0xa0) AM_MIRROR(0x0f) AM_WRITE(modem_w) |
| 516 | | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(PIO8155_TAG, pio8155_r, pio8155_w) |
| 516 | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(I8155_TAG, i8155_r, i8155_w) |
| 517 | 517 | // AM_RANGE(0xc0, 0xc0) AM_MIRROR(0x0f) AM_DEVREADWRITE(IM6402_TAG, im6402_data_r, im6402_data_w) |
| 518 | 518 | AM_RANGE(0xd0, 0xd0) AM_MIRROR(0x0f) AM_READWRITE(uart_status_r, uart_ctrl_w) |
| 519 | 519 | AM_RANGE(0xe0, 0xe0) AM_MIRROR(0x0f) AM_READWRITE(keyboard_r, kc85_ctrl_w) |
| r5190 | r5191 | |
| 527 | 527 | // AM_RANGE(0x80, 0x80) AM_MIRROR(0x0f) optional 128K ROM cartridge |
| 528 | 528 | AM_RANGE(0x90, 0x90) AM_MIRROR(0x0f) AM_WRITE(pc8201_ctrl_w) |
| 529 | 529 | AM_RANGE(0xa0, 0xa0) AM_MIRROR(0x0f) AM_READWRITE(pc8201_bank_r, pc8201_bank_w) |
| 530 | | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(PIO8155_TAG, pio8155_r, pio8155_w ) |
| 530 | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(I8155_TAG, i8155_r, i8155_w ) |
| 531 | 531 | // AM_RANGE(0xc0, 0xc0) AM_MIRROR(0x0f) AM_DEVREADWRITE(IM6402_TAG, im6402_data_r, im6402_data_w) |
| 532 | 532 | AM_RANGE(0xd0, 0xd0) AM_MIRROR(0x0f) AM_READWRITE(pc8201_uart_status_r, uart_ctrl_w) |
| 533 | 533 | AM_RANGE(0xe0, 0xe0) AM_MIRROR(0x0f) AM_READ(keyboard_r) |
| r5190 | r5191 | |
| 539 | 539 | ADDRESS_MAP_UNMAP_HIGH |
| 540 | 540 | AM_RANGE(0x90, 0x9f) AM_DEVREADWRITE(RP5C01A_TAG, rp5c01a_r, rp5c01a_w) |
| 541 | 541 | // AM_RANGE(0xa0, 0xa0) AM_MIRROR(0x0f) AM_DEVWRITE(TCM5089_TAG, tcm5089_w) |
| 542 | | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(PIO8155_TAG, pio8155_r, pio8155_w) |
| 542 | AM_RANGE(0xb0, 0xb7) AM_MIRROR(0x08) AM_DEVREADWRITE(I8155_TAG, i8155_r, i8155_w) |
| 543 | 543 | AM_RANGE(0xc0, 0xc0) AM_MIRROR(0x0e) AM_DEVREADWRITE(MSM8251_TAG, msm8251_data_r, msm8251_data_w) |
| 544 | 544 | AM_RANGE(0xc1, 0xc1) AM_MIRROR(0x0e) AM_DEVREADWRITE(MSM8251_TAG, msm8251_status_r, msm8251_control_w) |
| 545 | 545 | AM_RANGE(0xd0, 0xd0) AM_MIRROR(0x0f) AM_READWRITE(tandy200_bank_r, tandy200_bank_w) |
| r5190 | r5191 | |
| 921 | 921 | } |
| 922 | 922 | } |
| 923 | 923 | |
| 924 | | static PIO8155_INTERFACE( kc85_8155_intf ) |
| 924 | static I8155_INTERFACE( kc85_8155_intf ) |
| 925 | 925 | { |
| 926 | 926 | DEVCB_NULL, /* port A read */ |
| 927 | 927 | DEVCB_NULL, /* port B read */ |
| r5190 | r5191 | |
| 991 | 991 | if (state->buzzer) speaker_level_w(state->speaker, state->bell); |
| 992 | 992 | } |
| 993 | 993 | |
| 994 | | static PIO8155_INTERFACE( pc8201_8155_intf ) |
| 994 | static I8155_INTERFACE( pc8201_8155_intf ) |
| 995 | 995 | { |
| 996 | 996 | DEVCB_NULL, /* port A read */ |
| 997 | 997 | DEVCB_NULL, /* port B read */ |
| r5190 | r5191 | |
| 1090 | 1090 | } |
| 1091 | 1091 | } |
| 1092 | 1092 | |
| 1093 | | static PIO8155_INTERFACE( tandy200_8155_intf ) |
| 1093 | static I8155_INTERFACE( tandy200_8155_intf ) |
| 1094 | 1094 | { |
| 1095 | 1095 | DEVCB_NULL, /* port A read */ |
| 1096 | 1096 | DEVCB_NULL, /* port B read */ |
| r5190 | r5191 | |
| 1326 | 1326 | MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) |
| 1327 | 1327 | |
| 1328 | 1328 | /* devices */ |
| 1329 | | MDRV_PIO8155_ADD(PIO8155_TAG, XTAL_4_9152MHz/2, kc85_8155_intf) |
| 1329 | MDRV_I8155_ADD(I8155_TAG, XTAL_4_9152MHz/2, kc85_8155_intf) |
| 1330 | 1330 | MDRV_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, kc85_upd1990a_intf) |
| 1331 | 1331 | |
| 1332 | 1332 | /* printer */ |
| r5190 | r5191 | |
| 1361 | 1361 | MDRV_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) |
| 1362 | 1362 | |
| 1363 | 1363 | /* devices */ |
| 1364 | | MDRV_PIO8155_ADD(PIO8155_TAG, XTAL_4_9152MHz/2, pc8201_8155_intf) |
| 1364 | MDRV_I8155_ADD(I8155_TAG, XTAL_4_9152MHz/2, pc8201_8155_intf) |
| 1365 | 1365 | MDRV_UPD1990A_ADD(UPD1990A_TAG, XTAL_32_768kHz, kc85_upd1990a_intf) |
| 1366 | 1366 | |
| 1367 | 1367 | /* printer */ |
| r5190 | r5191 | |
| 1413 | 1413 | // MDRV_TCM5089_ADD(TCM5089_TAG, XTAL_3_579545MHz) |
| 1414 | 1414 | |
| 1415 | 1415 | /* devices */ |
| 1416 | | MDRV_PIO8155_ADD(PIO8155_TAG, XTAL_4_9152MHz/2, tandy200_8155_intf) |
| 1416 | MDRV_I8155_ADD(I8155_TAG, XTAL_4_9152MHz/2, tandy200_8155_intf) |
| 1417 | 1417 | MDRV_RP5C01A_ADD(RP5C01A_TAG, XTAL_32_768kHz, tandy200_rp5c01a_intf) |
| 1418 | 1418 | MDRV_MSM8251_ADD(MSM8251_TAG, /*XTAL_4_9152MHz/2,*/ tandy200_msm8251_interface) |
| 1419 | 1419 | // MDRV_MC14412_ADD(MC14412_TAG, XTAL_1MHz) |