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Some minor bugfixes.

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This commit is contained in:
OBattler
2023-04-24 02:47:17 +02:00
parent e00f3968ae
commit 3b54cb085e
5 changed files with 39 additions and 9 deletions
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26
src/device/kbc_at.c
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@@ -801,12 +801,30 @@ write64_generic(void *priv, uint8_t val)
IBM PS/1: xxxxxxxx
IBM PS/2 MCA: xxxxx1xx
Intel AMI Pentium BIOS'es with AMI MegaKey KB-5 keyboard controller: x1x1xxxx
Acer: xxx0x0xx
Acer: xxxxx0xx
Packard Bell PB450: xxxxx1xx
P6RP4: xx1xx1xx
Epson Action Tower 2600: xxxx01xx
TriGem Hawk: xxxx11xx
Machine input based on current code: 11111111
Everything non-Green: Pull down bit 7 if not PS/2 and keyboard is inhibited.
Pull down bit 6 if primary display is CGA.
Xi8088: Pull down bit 6 if primary display is MDA.
Acer: Pull down bit 6 if primary display is MDA.
Pull down bit 2 always (must be so to enable CMOS Setup).
IBM PS/1: Pull down bit 6 if current floppy drive is 3.5".
Epson Action Tower 2600: Pull down bit 3 always (for Epson logo).
NCR: Pull down bit 5 always (power-on default speed = high).
Pull down bit 3 if there is no FPU.
Pull down bits 1 and 0 always?
Compaq: Pull down bit 6 if Compaq dual-scan display is in use.
Pull down bit 5 if system board DIP switch is ON.
Pull down bit 4 if CPU speed selected is auto.
Pull down bit 3 if CPU speed selected is slow (4 MHz).
Pull down bit 2 if FPU is present.
Pull down bits 1 and 0 always?
Bit 7: AT KBC only - keyboard inhibited (often physical lock): 0 = yes, 1 = no (also Compaq);
Bit 6: Mostly, display: 0 = CGA, 1 = MDA, inverted on Xi8088 and Acer KBC's;
Intel AMI MegaKey KB-5: Used for green features, SMM handler expects it to be set;
@@ -817,7 +835,6 @@ write64_generic(void *priv, uint8_t val)
Compaq: System board DIP switch 5: 0 = ON, 1 = OFF.
Bit 4: (Which board?): RAM on motherboard: 0 = 512 kB, 1 = 256 kB;
NCR: RAM on motherboard: 0 = unsupported, 1 = 512 kB;
Acer: Must be 0;
Intel AMI MegaKey KB-5: Must be 1;
IBM PS/1: Ignored;
Compaq: 0 = Auto speed selected, 1 = High speed selected.
@@ -851,6 +868,7 @@ write64_generic(void *priv, uint8_t val)
fixed_bits |= 0x40;
if (kbc_ven == KBC_VEN_IBM_PS1) {
current_drive = fdc_get_current_drive();
/* (B0 or F0) | (fdd_is_525(current_drive) on bit 6) */
add_to_kbc_queue_front(dev, dev->p1 | fixed_bits | (fdd_is_525(current_drive) ? 0x40 : 0x00),
0, 0x00);
} else if (kbc_ven == KBC_VEN_NCR) {
@@ -864,6 +882,7 @@ write64_generic(void *priv, uint8_t val)
* bit 1: high/auto speed
* bit 0: dma mode
*/
/* (B0 or F0) | 0x04 | (display on bit 6) | (fpu on bit 3) */
add_to_kbc_queue_front(dev, (dev->p1 | fixed_bits | (video_is_mda() ? 0x40 : 0x00) | (hasfpu ? 0x08 : 0x00)) & 0xdf,
0, 0x00);
} else if (kbc_ven == KBC_VEN_TRIGEM_AMI) {
@@ -874,10 +893,13 @@ write64_generic(void *priv, uint8_t val)
0, 0: Generic AMI logo. */
if (dev->misc_flags & FLAG_PCI)
fixed_bits |= 8;
/* (B0 or F0) | (0x04 or 0x0c) */
add_to_kbc_queue_front(dev, dev->p1 | fixed_bits, 0, 0x00);
} else if (((dev->flags & KBC_TYPE_MASK) >= KBC_TYPE_PS2_1) && ((dev->flags & KBC_TYPE_MASK) < KBC_TYPE_GREEN))
/* (B0 or F0) | (0x08 or 0x0c) */
add_to_kbc_queue_front(dev, ((dev->p1 | fixed_bits) & 0xf0) | (((dev->flags & KBC_VEN_MASK) == KBC_VEN_ACER) ? 0x08 : 0x0c), 0, 0x00);
else
/* (B0 or F0) | (0x04 or 0x44) */
add_to_kbc_queue_front(dev, dev->p1 | fixed_bits, 0, 0x00);
dev->p1 = ((dev->p1 + 1) & 3) | (dev->p1 & 0xfc);
return 0;