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Hook up FDC37C6xx to ECP+EPP.

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This commit is contained in:
OBattler
2025-08-03 13:59:06 +02:00
parent 1ff65989ff
commit 633308be28
1 changed files with 67 additions and 12 deletions
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79
src/sio/sio_fdc37c6xx.c
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@@ -109,24 +109,76 @@ set_serial_addr(fdc37c6xx_t *dev, int port)
static void
lpt_handler(fdc37c6xx_t *dev)
{
lpt_port_remove(dev->lpt);
switch (dev->regs[1] & 3) {
case 1:
lpt_port_setup(dev->lpt, LPT_MDA_ADDR);
lpt_port_irq(dev->lpt, LPT_MDA_IRQ);
uint16_t lpt_port = 0x0000;
uint16_t mask = 0xfffc;
uint8_t local_enable = 1;
uint8_t lpt_irq = LPT1_IRQ;
/* DMA is guesswork - what channel do boards actually use? */
uint8_t lpt_dma = 3;
uint8_t lpt_ext = !(dev->regs[1] & 0x08);
uint8_t lpt_mode = (dev->chip_id >= 0x65) ? (dev->regs[4] & 0x03) : 0x00;
switch (dev->regs[1] & 0x03) {
case 0x01:
lpt_port = LPT_MDA_ADDR;
lpt_irq = LPT_MDA_IRQ;
break;
case 2:
lpt_port_setup(dev->lpt, LPT1_ADDR);
lpt_port_irq(dev->lpt, LPT1_IRQ /*LPT2_IRQ*/);
case 0x02:
lpt_port = LPT1_ADDR;
lpt_irq = LPT1_IRQ /*LPT2_IRQ*/;
break;
case 3:
lpt_port_setup(dev->lpt, LPT2_ADDR);
lpt_port_irq(dev->lpt, LPT1_IRQ /*LPT2_IRQ*/);
case 0x03:
lpt_port = LPT2_ADDR;
lpt_irq = LPT1_IRQ /*LPT2_IRQ*/;
break;
default:
local_enable = 0;
break;
}
if (lpt_irq > 15)
lpt_irq = 0xff;
if (lpt_dma >= 4)
lpt_dma = 0xff;
lpt_port_remove(dev->lpt);
lpt_set_fifo_threshold(dev->lpt, dev->regs[0x0a] & 0x0f);
if (lpt_ext) switch (lpt_mode) {
default:
case 0x00:
lpt_set_epp(dev->lpt, 0);
lpt_set_ecp(dev->lpt, 0);
lpt_set_ext(dev->lpt, 1);
break;
case 0x01:
mask = 0xfff8;
lpt_set_epp(dev->lpt, 1);
lpt_set_ecp(dev->lpt, 0);
lpt_set_ext(dev->lpt, 0);
break;
case 0x02:
lpt_set_epp(dev->lpt, 0);
lpt_set_ecp(dev->lpt, 1);
lpt_set_ext(dev->lpt, 0);
break;
case 0x03:
mask = 0xfff8;
lpt_set_epp(dev->lpt, 1);
lpt_set_ecp(dev->lpt, 1);
lpt_set_ext(dev->lpt, 0);
break;
} else {
lpt_set_epp(dev->lpt, 0);
lpt_set_ecp(dev->lpt, 0);
lpt_set_ext(dev->lpt, 0);
}
if (local_enable && (lpt_port >= 0x0100) && (lpt_port <= (0x0ffc & mask)))
lpt_port_setup(dev->lpt, lpt_port);
lpt_port_irq(dev->lpt, lpt_irq);
}
static void
@@ -169,10 +221,13 @@ fdc37c6xx_write(uint16_t port, uint8_t val, void *priv)
else
dev->cur_reg = val;
} else {
if (dev->cur_reg > dev->max_reg)
if (dev->cur_reg > dev->max_reg) {
pclog("[W] %02X = %02X\n", dev->cur_reg, val);
return;
}
valxor = val ^ dev->regs[dev->cur_reg];
pclog("[W] %02X = %02X\n", dev->cur_reg, val);
dev->regs[dev->cur_reg] = val;
switch (dev->cur_reg) {