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ISA PnP: Return bit 0 of status register set between Wake[0] and Set CSN, fixes Creative ISA PnP sound card drivers installer for Windows 3.1 freezing.

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OBattler
2024-10-27 16:55:05 +01:00
parent f280a0ee6e
commit 31beadd103
1 changed files with 7 additions and 2 deletions
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9
src/device/isapnp.c
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@@ -110,6 +110,7 @@ typedef struct _isapnp_card_ {
} isapnp_card_t;
typedef struct {
uint8_t in_isolation;
uint8_t reg;
uint8_t key_pos : 5;
uint16_t read_data_addr;
@@ -313,6 +314,8 @@ isapnp_read_common(isapnp_t *dev, isapnp_card_t *card, isapnp_device_t *ld, uint
case 0x05: /* Status */
ret = 0x00;
if (dev->in_isolation)
ret = 0x01;
CHECK_CURRENT_CARD();
isapnp_log("ISAPnP: Query status for CSN %02X\n", card->csn);
@@ -485,15 +488,16 @@ isapnp_write_common(isapnp_t *dev, isapnp_card_t *card, isapnp_device_t *ld, uin
case 0x03: /* Wake[CSN] */
isapnp_log("ISAPnP: Wake[%02X]\n", val);
card = dev->first_card;
if (val == 0)
dev->in_isolation |= 1;
while (card) {
if (card->csn == val) {
card->rom_pos = 0;
card->id_checksum = isapnp_init_key[0];
if (card->state == PNP_STATE_SLEEP)
card->state = (val == 0) ? PNP_STATE_ISOLATION : PNP_STATE_CONFIG;
} else {
} else
card->state = PNP_STATE_SLEEP;
}
card = card->next;
}
@@ -505,6 +509,7 @@ isapnp_write_common(isapnp_t *dev, isapnp_card_t *card, isapnp_device_t *ld, uin
isapnp_set_csn(dev->isolated_card, val);
dev->isolated_card->state = PNP_STATE_CONFIG;
dev->isolated_card = NULL;
dev->in_isolation = 0;
} else {
isapnp_log("ISAPnP: Set CSN %02X but no card is isolated\n", val);
}