src/mess/drivers/ti99_8.c
| r9532 | r9533 | |
|---|
| 145 | 145 | - P0-P3: column select |
| 146 | 146 | - INT6*-INT11*: row inputs (int6* is only used for joystick fire) |
| 147 | 147 | |
| 148 | | |
| 149 | | Known Issues (MZ, 2009-04-26) |
| 150 | | - Extended Basic II does not start when a floppy controller is present |
| 151 | | - Multiple cartridges are not shown in the startup screen; only one |
| 152 | | cartridge is presented. The slots are scanned, though. Need to check whether |
| 153 | | this is a bug of the operating system or of the emulation. |
| 154 | | - Emulation speed must be checked. I have inserted adjust_icounts, but I need to |
| 155 | | check whether the console experienced those delays actually. Unfortunately, |
| 156 | | there is almost no real hardware available. |
| 157 | | - Extended Basic II gets stuck with OLD MINIMEM. MiniMemory may be incompatible |
| 158 | | due to the different memory layout. SAVE/OLD only works if the machine is |
| 159 | | neither reset nor restarted. |
| 160 | | |
| 161 | | ROM file contents: |
| 148 | ROM file contents: |
| 162 | 149 | 0000-1fff ROM0 0x0000 (logical address) |
| 163 | 150 | 2000-3fff ROM1 0xffa000 - 0xffbfff |
| 164 | 151 | 4000-5fff DSR1 0xff4000 (TTS) |
| 165 | 152 | 6000-7fff ROM1a 0xffc000 - 0xffdfff |
| 166 | 153 | 8000-9fff DSR2 0xff4000 (missing; Hexbus?) |
| 167 | | */ |
| 168 | 154 | |
| 155 | =========================================================================== |
| 156 | Known Issues (MZ, 2010-11-07) |
| 157 | |
| 158 | KEEP IN MIND THAT TEXAS INSTRUMENTS NEVER RELEASED THE TI-99/8 AND THAT |
| 159 | THERE ARE ONLY A FEW PROTOTYPES OF THE TI-99/8 AVAILABLE. ALL SOFTWARE |
| 160 | MUST BE ASSUMED TO HAVE REMAINED IN A PRELIMINARY STATE. |
| 161 | |
| 162 | - Extended Basic II does not start when a floppy controller is present. This is |
| 163 | a problem of the prototypical XB II which we cannot solve. It seems as if only |
| 164 | hexbus devices are properly supported, but we currently do not have an |
| 165 | emulation for those. Thus you can currently only use cassette to load and |
| 166 | save programs. You MUST turn off the floppy controller support in the |
| 167 | configuration before you enter XB II. Other cartridges (like Editor/Assembler) |
| 168 | seem to be not affected by this problem and can make use of the floppy |
| 169 | controllers. |
| 170 | Technical detail: The designers of XB II seem to have decided to put PABs |
| 171 | (Peripheral access block; contains pointers to buffers, the file name, and |
| 172 | the access modes) into CPU RAM instead of the traditional storage in VDP |
| 173 | RAM. The existing peripheral cards are hard-coded to interpret the given |
| 174 | pointer to the PAB as pointing to a VDP RAM address. That is, as soon as |
| 175 | the card is found, control is passed to the DSR (device service routine), |
| 176 | the file name will not be found, and control returns with an error. It seems |
| 177 | as if XB II does not properly handle this situation and may lock up |
| 178 | (sometimes it starts up, but file access is still not possible). |
| 179 | |
| 180 | - Multiple cartridges are not shown in the startup screen; only one |
| 181 | cartridge is presented. You have to manually select the cartridges with the |
| 182 | dip switch. |
| 183 | |
| 184 | - Emulation speed may still be incorrect. |
| 185 | |
| 186 | - SAVE and OLD MINIMEM do not work properly in XB II. It seems as if the |
| 187 | mapper shadows the NVRAM of the cartridge. You will lose the contents when |
| 188 | you turn off the machine. |
| 189 | =========================================================================== |
| 190 | |
| 191 | */ |
| 192 | |
| 169 | 193 | #include "emu.h" |
| 170 | 194 | #include "cpu/tms9900/tms9900.h" |
| 171 | 195 | #include "sound/sn76496.h" |
| r9532 | r9533 | |
|---|
| 242 | 266 | PORT_DIPSETTING( 0x02, "Slot 2" ) |
| 243 | 267 | PORT_DIPSETTING( 0x03, "Slot 3" ) |
| 244 | 268 | PORT_DIPSETTING( 0x04, "Slot 4" ) |
| 269 | |
| 270 | PORT_START( "BWGDIP1" ) |
| 271 | PORT_DIPNAME( 0x01, 0x00, "BwG step rate" ) PORT_CONDITION( "DISKCTRL", 0x07, PORTCOND_EQUALS, 0x02 ) |
| 272 | PORT_DIPSETTING( 0x00, "6 ms") |
| 273 | PORT_DIPSETTING( 0x01, "20 ms") |
| 245 | 274 | |
| 275 | PORT_START( "BWGDIP2" ) |
| 276 | PORT_DIPNAME( 0x01, 0x00, "BwG date/time display" ) PORT_CONDITION( "DISKCTRL", 0x07, PORTCOND_EQUALS, 0x02 ) |
| 277 | PORT_DIPSETTING( 0x00, "Hide") |
| 278 | PORT_DIPSETTING( 0x01, "Show") |
| 279 | |
| 280 | PORT_START( "BWGDIP34" ) |
| 281 | PORT_DIPNAME( 0x03, 0x00, "BwG drives" ) PORT_CONDITION( "DISKCTRL", 0x07, PORTCOND_EQUALS, 0x02 ) |
| 282 | PORT_DIPSETTING( 0x00, "DSK1 only") |
| 283 | PORT_DIPSETTING( 0x01, "DSK1-DSK2") |
| 284 | PORT_DIPSETTING( 0x02, "DSK1-DSK3") |
| 285 | PORT_DIPSETTING( 0x03, "DSK1-DSK4") |
| 286 | |
| 246 | 287 | PORT_START( "HFDCDIP" ) |
| 247 | 288 | PORT_DIPNAME( 0xff, 0x55, "HFDC drive config" ) PORT_CONDITION( "DISKCTRL", 0x07, PORTCOND_EQUALS, 0x03 ) |
| 248 | 289 | PORT_DIPSETTING( 0x00, "40 track, 16 ms") |