MESS SVN History

15994 Revisions

r6337 Sunday 8th November, 2009 at 15:55:31 UTC by Curt Coder
[MIKROMIK] Write floppy TC only during DACK.

[src/emu/machine]	8237dma.c
[src/mess/drivers]	mikromik.c
[src/mess/includes]	mikromik.h

src/emu/machine/8237dma.c
r6336	r6337
217	217
218	218	for (i = 0; i < 4; i++)
219	219	{
220		int state = (i == channel) ^ BIT(i8237->command, 7);
	220	int state = (i == channel) ^ !BIT(i8237->command, 7);
221	221
222	222	devcb_call_write_line(&i8237->chan[i].out_dack_func, state);
223	223	}

src/mess/includes/mikromik.h
r6336	r6337
31	31	int tx21;
32	32	int rcl;
33	33
	34	/* floppy state */
34	35	int recall;
	36	int dack3;
	37	int tc;
35	38
36	39	/* devices */
37	40	const device_config *i8212;

src/mess/drivers/mikromik.c
r6336	r6337
21	21	- NEC uPD7220 GDC
22	22	- accurate video timing
23	23	- floppy DRQ during RECALL = 0
24		- write floppy TC only during DACK
25	24	- PCB layout
26	25	- NEC uPD7201 MPSC
27	26
r6336	r6337
420	419	{
421	420	mm1_state *driver_state = device->machine->driver_data;
422	421
423		/* floppy terminal count */
424		upd765_tc_w(driver_state->upd765, !state);
	422	if (!driver_state->dack3)
	423	{
	424	/* floppy terminal count */
	425	upd765_tc_w(driver_state->upd765, !state);
	426	}
425	427
	428	driver_state->tc = !state;
	429
426	430	cputag_set_input_line(device->machine, I8085A_TAG, I8085_RST75_LINE, state);
427	431	}
428	432
	433	static WRITE_LINE_DEVICE_HANDLER( dack3_w )
	434	{
	435	mm1_state *driver_state = device->machine->driver_data;
	436
	437	driver_state->dack3 = state;
	438
	439	if (!driver_state->dack3)
	440	{
	441	/* floppy terminal count */
	442	upd765_tc_w(driver_state->upd765, driver_state->tc);
	443	}
	444	}
	445
429	446	static I8237_INTERFACE( mm1_dma8237_intf )
430	447	{
431	448	DEVCB_LINE(dma_hrq_changed),
r6336	r6337
434	451	DEVCB_MEMORY_HANDLER(I8085A_TAG, PROGRAM, memory_write_byte),
435	452	{ DEVCB_NULL, DEVCB_NULL, DEVCB_DEVICE_HANDLER(UPD7201_TAG, mpsc_dack_r), DEVCB_DEVICE_HANDLER(UPD765_TAG, upd765_dack_r) },
436	453	{ DEVCB_DEVICE_HANDLER(I8275_TAG, i8275_dack_w), DEVCB_DEVICE_HANDLER(UPD7201_TAG, mpsc_dack_w), DEVCB_NULL, DEVCB_DEVICE_HANDLER(UPD765_TAG, upd765_dack_w) },
437		{ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_NULL }
	454	{ DEVCB_NULL, DEVCB_NULL, DEVCB_NULL, DEVCB_LINE(dack3_w) }
438	455	};
439	456
440	457	/* uPD765 Interface */
r6336	r6337
689	706	state_save_register_global(machine, state->tx21);
690	707	state_save_register_global(machine, state->rcl);
691	708	state_save_register_global(machine, state->recall);
	709	state_save_register_global(machine, state->dack3);
692	710	}
693	711
694	712	static MACHINE_RESET( mm1 )

15994 Revisions