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r2198 Tuesday 1st April, 2008 at 16:27:45 UTC by Dirk Best
[COUPE] Added support for the SAMBUS real time clock (patch for MAME changes submitted to MAMEDev)

[src/emu/machine]	msm6242.c
[src/mess/drivers]	coupe.c
[src/mess/includes]	coupe.h
[src/mess/machine]	coupe.c

src/emu/machine/msm6242.c

r2197	r2198
5	5	***************************************************************************/
6	6
7	7	#include "driver.h"
8		#include "deprecat.h"
9	8	#include "machine/msm6242.h"
10	9
	10
11	11	static UINT8 msm6264_reg[3] = { 0, 0, 0 };
12	12	static mame_system_time msm6264_hold_time = { 0 };
13	13
	14	/* temporary buffer to hold values written to the device */
	15	static UINT8 time_buffer[13];
	16
	17	/* TRUE if the time was just written */
	18	static int time_just_written = FALSE;
	19
	20
14	21	enum
15	22	{
16	23	MSM6264_REG_S1      = 0,
r2197	r2198
31	38	MSM6264_REG_CF
32	39	};
33	40
	41
	42	static TIMER_CALLBACK( reset_time )
	43	{
	44	time_just_written = FALSE;
	45	}
	46
	47
34	48	READ8_HANDLER( msm6242_r )
35	49	{
36	50	mame_system_time curtime, *systime = &curtime;
37	51
	52	/* return the buffered time if it has recently been written */
	53	if (time_just_written && offset < MSM6264_REG_CD)
	54	{
	55	return time_buffer[offset];
	56	}
	57
38	58	if ( msm6264_reg[0] & 1 ) /* if HOLD is set, use the hold time */
39	59	{
40	60	systime = &msm6264_hold_time;
41	61	}
42	62	else /* otherwise, use the current time */
43	63	{
44		mame_get_current_datetime(Machine, &curtime);
	64	mame_get_current_datetime(machine, &curtime);
45	65	}
46	66
47	67	switch(offset)
r2197	r2198
90	110	return 0;
91	111	}
92	112
	113
93	114	WRITE8_HANDLER( msm6242_w )
94	115	{
	116	/* mark as just written and start a timer to reset it again */
	117	if (offset < MSM6264_REG_CD)
	118	{
	119	time_buffer[offset] = data;
	120	time_just_written = TRUE;
	121	timer_set(ATTOTIME_IN_MSEC(500), NULL, 0, reset_time);
	122	return;
	123	}
	124
95	125	switch(offset)
96	126	{
97	127	case MSM6264_REG_CD:
r2197	r2198
100	130
101	131	if ( data & 1 )   /* was Hold set? */
102	132	{
103		mame_get_current_datetime(Machine, &msm6264_hold_time);
	133	mame_get_current_datetime(machine, &msm6264_hold_time);
104	134	}
105	135
106	136	return;
r2197	r2198
133	163	return msm6242_r(machine, offset);
134	164	}
135	165
	166
136	167	WRITE16_HANDLER( msm6242_lsb_w )
137	168	{
138	169	if (ACCESSING_LSB)

src/mess/includes/coupe.h

r2197	r2198
34	34	void coupe_update_memory(void);
35	35
36	36	DEVICE_IMAGE_LOAD( coupe_floppy );
37		MACHINE_START( coupe );
	37	DRIVER_INIT( coupe );
38	38	MACHINE_RESET( coupe );
39	39
40	40

src/mess/machine/coupe.c

r2197	r2198
11	11	#include "includes/coupe.h"
12	12	#include "devices/basicdsk.h"
13	13	#include "machine/wd17xx.h"
	14	#include "machine/msm6242.h"
14	15
15	16
16	17	#define LMPR_RAM0   0x20   /* If bit set ram is paged into bank 0, else its rom0 */
r2197	r2198
113	114	}
114	115
115	116
	117	static READ8_HANDLER( coupe_rtc_r )
	118	{
	119	return msm6242_r(machine, offset >> 12);
	120	}
	121
	122
	123	static WRITE8_HANDLER( coupe_rtc_w )
	124	{
	125	msm6242_w(machine, offset >> 12, data);
	126	}
	127
	128
116	129	MACHINE_RESET( coupe )
117	130	{
118	131	memset(&coupe_regs, 0, sizeof(coupe_regs));
r2197	r2198
123	136	coupe_regs.line_int = 0xff;  /* line interrupts disabled */
124	137	coupe_regs.status = 0x1f;    /* no interrupts active */
125	138
	139	if (readinputportbytag("config") & 0x01)
	140	{
	141	/* install RTC */
	142	memory_install_readwrite8_handler(0, ADDRESS_SPACE_IO, 0xef, 0xef, 0xffff, 0xff00, coupe_rtc_r, coupe_rtc_w);
	143	}
	144	else
	145	{
	146	/* no RTC support */
	147	memory_install_readwrite8_handler(0, ADDRESS_SPACE_IO, 0xef, 0xef, 0xffff, 0xff00, SMH_UNMAP, SMH_UNMAP);
	148	}
	149
126	150	coupe_update_memory();
127	151	}
128	152
129	153
130		MACHINE_START( coupe )
	154	DRIVER_INIT( coupe )
131	155	{
132	156	wd17xx_init(machine, WD_TYPE_1772, NULL, NULL);
133	157	}

src/mess/drivers/coupe.c

r2197	r2198
430	430	PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("DOWN") PORT_CODE(KEYCODE_DOWN)
431	431	PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("LEFT") PORT_CODE(KEYCODE_LEFT)
432	432	PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("RIGHT") PORT_CODE(KEYCODE_RIGHT)
	433
	434	PORT_START_TAG("config")
	435	PORT_CONFNAME(0x01, 0x00, "Real Time Clock")
	436	PORT_CONFSETTING(   0x00, DEF_STR(None))
	437	PORT_CONFSETTING(   0x01, "SAMBUS")
433	438	INPUT_PORTS_END
434	439
435	440
r2197	r2198
495	500	MDRV_CPU_IO_MAP(coupe_io, 0)
496	501	MDRV_CPU_VBLANK_INT("main", coupe_frame_interrupt)
497	502
498		MDRV_MACHINE_START(coupe)
499	503	MDRV_MACHINE_RESET(coupe)
500	504
501	505	/* video hardware */
r2197	r2198
603	607	*
604	608	*************************************/
605	609
606		/*    YEAR  NAME   PARENT  COMPAT  MACHINE  INPUT  INIT  CONFIG  COMPANY                        FULLNAME     FLAGS */
607		COMP( 1989, coupe, 0,      0,      coupe,   coupe, 0,    coupe,  "Miles Gordon Technology plc", "Sam Coupe", 0 )
	610	/*    YEAR  NAME   PARENT  COMPAT  MACHINE  INPUT  INIT   CONFIG  COMPANY                        FULLNAME     FLAGS */
	611	COMP( 1989, coupe, 0,      0,      coupe,   coupe, coupe, coupe,  "Miles Gordon Technology plc", "Sam Coupe", 0 )

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