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r9101 Sunday 12th September, 2010 at 09:27:05 UTC by Curt Coder
[CONKORT] Fixed drive selection and busy bit.

[src/mess/machine]

conkort.c

src/mess/machine/conkort.c

r9100	r9101
178	178	---------------
179	179	- controller reads a couple of sectors on boot, bails out, and starts to STEP_OUT ad infinitum
180	180	- Z80 DMA reset command is broken (it keeps resetting A/B port addresses)
181		- status bit 0 (busy) ?
182	181	- 2KB RAM option
183	182	- some SW2 options make controller try to WRITE_TRK
184	183
r9100	r9101
244	243	int fdc_irq;         /* FDC interrupt */
245	244	int dma_irq;         /* DMA interrupt */
246	245	int busy;            /* busy bit */
	246	int force_busy;         /* force busy bit */
247	247
248	248	/* devices */
249	249	running_device *bus;
r9100	r9101
396	396	conkort->sel1 = BIT(data, 1);
397	397
398	398	/* motor enable */
399		floppy_mon_w(conkort->image0, BIT(data, 3));
400		floppy_mon_w(conkort->image1, BIT(data, 3));
401		floppy_drive_set_ready_state(conkort->image0, 1, 1);
402		floppy_drive_set_ready_state(conkort->image1, 1, 1);
	399	int mtron = BIT(data, 3);
	400	floppy_mon_w(conkort->image0, mtron);
	401	floppy_mon_w(conkort->image1, mtron);
	402	floppy_drive_set_ready_state(conkort->image0, !mtron, 1);
	403	floppy_drive_set_ready_state(conkort->image1, !mtron, 1);
403	404
404	405	/* disk side selection */
405	406	//wd17xx_set_side(device, BIT(data, 4));
r9100	r9101
495	496	{
496	497	fast_t *conkort = get_safe_token_fast(device);
497	498
498		UINT8 data = 0xff;
	499	UINT8 data = 0;
499	500
500	501	if (conkort->cs)
501	502	{
502		// LS240 inverts the data, D4/D5 not connected
503		data = (~conkort->status & 0xcf) | 0x30 | !(conkort->busy & BIT(conkort->status, 0));
	503	data = (conkort->status & 0xce) | conkort->busy;
504	504	}
505	505
506		return data;
	506	// LS240 inverts the data
	507	return data ^ 0xff;
507	508	}
508	509
509	510	READ8_DEVICE_HANDLER( luxor_55_21046_inp_r )
r9100	r9101
566	567	{
567	568	fast_t *conkort = get_safe_token_fast(device->owner());
568	569
569		conkort->busy = 0;
	570	if (BIT(conkort->status, 0))
	571	{
	572	conkort->busy = 0;
	573	}
570	574
571	575	return conkort->data_in;
572	576	}
r9100	r9101
575	579	{
576	580	fast_t *conkort = get_safe_token_fast(device->owner());
577	581
578		conkort->busy = 0;
	582	if (BIT(conkort->status, 0))
	583	{
	584	conkort->busy = 0;
	585	}
579	586
580	587	conkort->data_out = data;
581	588	}
r9100	r9101
586	593
587	594	bit      description
588	595
589		0      busy
590		1      index pulse/DRQ
591		2      track 0/lost data
592		3      CRC error
593		4      seek error/RNF
594		5      head loaded/write fault
595		6      write protect
596		7      not ready
	596	0      force busy
	597	1
	598	2
	599	3
	600	4      N/C
	601	5      N/C
	602	6
	603	7
597	604
598	605	*/
599	606
r9100	r9101
601	608
602	609	conkort->status = data;
603	610
604		if (BIT(data, 0))
	611	/* busy */
	612	if (!BIT(conkort->status, 0))
605	613	{
606		conkort->busy = 0;
	614	conkort->busy = 1;
607	615	}
608	616	}
609	617
r9100	r9101
613	621
614	622	bit      description
615	623
616		0      _MOTEA
617		1      _DRVSB
618		2      _DRVSA
619		3      _MOTEB
	624	0      DS0
	625	1      DS1
	626	2      DS2
	627	3      MTRON
620	628	4      pin 2 of 50-pin floppy connector, not used
621		5      _SIDE1
	629	5      SIDE1
622	630	6
623	631	7
624	632
r9100	r9101
626	634
627	635	fast_t *conkort = get_safe_token_fast(device->owner());
628	636
629		/* motor enable */
630		floppy_mon_w(conkort->image0, !BIT(data, 0));
631		floppy_mon_w(conkort->image1, !BIT(data, 3));
632		floppy_drive_set_ready_state(conkort->image0, 1, 1);
633		floppy_drive_set_ready_state(conkort->image1, 1, 1);
634
635	637	/* drive select */
636		if (BIT(data, 2)) wd17xx_set_drive(device, 0);
	638	if (BIT(data, 0)) wd17xx_set_drive(device, 0);
637	639	if (BIT(data, 1)) wd17xx_set_drive(device, 1);
	640	//if (BIT(data, 2)) wd17xx_set_drive(device, 2);
638	641
	642	/* motor enable */
	643	int mtron = BIT(data, 3);
	644	floppy_mon_w(conkort->image0, !mtron);
	645	floppy_mon_w(conkort->image1, !mtron);
	646	floppy_drive_set_ready_state(conkort->image0, mtron, 1);
	647	floppy_drive_set_ready_state(conkort->image1, mtron, 1);
	648
639	649	/* side select */
640	650	wd17xx_set_side(device, BIT(data, 5));
641	651	}
r9100	r9101
688	698	UINT8 data = 0;
689	699
690	700	/* busy */
691		data |= (conkort->busy & BIT(conkort->status, 0));
	701	data |= conkort->busy;
692	702
693	703	/* SW1 */
694	704	UINT8 sw1 = input_port_read(device->machine, "luxor_55_21046:SW1") & 0x0f;

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