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Fixes for reading latched values with ports 0x40-0x43.

This commit is contained in:
James Abbatiello 2000-08-22 20:38:47 +00:00 committed by Alexandre Julliard
parent ba0a533669
commit 9ad9e65d64
1 changed files with 110 additions and 98 deletions
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208
msdos/ioports.c
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@ -26,14 +26,18 @@
DEFAULT_DEBUG_CHANNEL(int) DEFAULT_DEBUG_CHANNEL(int)
static WORD tmr_8253_countmax[3] = {0xffff, 0x12, 1}; /* [2] needs to be 1 ! */ static struct {
/* if byte_toggle is TRUE, then hi byte has already been written */ WORD countmax;
static BOOL16 tmr_8253_byte_toggle[3] = {FALSE, FALSE, FALSE}; BOOL16 byte_toggle; /* if TRUE, then hi byte has already been written */
static WORD tmr_8253_latch[3] = {0, 0, 0}; WORD latch;
BOOL16 latched;
/* 4th contents are dummy */ BYTE ctrlbyte_ch;
static BOOL16 tmr_8253_latched[4] = {FALSE, FALSE, FALSE, FALSE}; WORD oldval;
static BYTE tmr_8253_ctrlbyte_ch[4] = {0x06, 0x44, 0x86, 0}; } tmr_8253[3] = {
{0xFFFF, FALSE, 0, FALSE, 0x06, 0},
{0x0012, FALSE, 0, FALSE, 0x44, 0},
{0x0001, FALSE, 0, FALSE, 0x86, 0},
};
static int dummy_ctr = 0; static int dummy_ctr = 0;
@ -275,54 +279,53 @@ DWORD IO_inport( int port, int size )
switch (port) switch (port)
{ {
case 0x3ba:
case 0x3da:
res = (DWORD)VGA_ioport_in( port );
break;
case 0x40: case 0x40:
case 0x41: case 0x41:
case 0x42: case 0x42:
{ {
BYTE chan = port & 3; BYTE chan = port & 3;
WORD tempval = 0; WORD tempval = 0;
if (tmr_8253[chan].latched)
tempval = tmr_8253[chan].latch;
else
{
dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
if (chan == 0) /* System timer counter divisor */
{
/* FIXME: DOSVM_GetTimer() returns quite rigid values */
tempval = dummy_ctr + (WORD)DOSVM_GetTimer();
}
else
{
/* FIXME: intelligent hardware timer emulation needed */
tempval = dummy_ctr;
}
}
if (tmr_8253_latched[chan] == TRUE) switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
{ {
tempval = tmr_8253_latch[chan]; case 0:
tmr_8253_latched[chan] = FALSE; res = 0; /* shouldn't happen? */
} break;
else case 1: /* read lo byte */
{ res = (BYTE)tempval;
dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0)); tmr_8253[chan].latched = FALSE;
if (chan == 0) /* System timer counter divisor */ break;
/* FIXME: DOSVM_GetTimer() returns quite rigid values */ case 3: /* read lo byte, then hi byte */
tempval = dummy_ctr+(WORD)DOSVM_GetTimer(); tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
else if (tmr_8253[chan].byte_toggle)
{ /* FIXME: intelligent hardware timer emulation needed */
tempval = dummy_ctr;
}
}
switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
{
case 0x00:
break; /* correct ? */
case 0x10: /* read lo byte */
res = (BYTE)tempval;
break;
case 0x30: /* read lo byte, then hi byte */
tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
if (tmr_8253_byte_toggle[chan] == TRUE)
{ {
res = (BYTE)tempval; res = (BYTE)tempval;
break; break;
} }
/* else [fall through if read hi byte !] */ /* else [fall through if read hi byte !] */
case 0x20: /* read hi byte */ case 2: /* read hi byte */
res = (BYTE)tempval>>8; res = (BYTE)(tempval >> 8);
break; tmr_8253[chan].latched = FALSE;
break;
} }
break;
} }
break;
case 0x60: case 0x60:
res = INT_Int09ReadScan(NULL); res = INT_Int09ReadScan(NULL);
#if 0 /* what's this port got to do with parport ? */ #if 0 /* what's this port got to do with parport ? */
@ -345,6 +348,10 @@ DWORD IO_inport( int port, int size )
case 0x201: case 0x201:
res = 0xffffffff; /* no joystick */ res = 0xffffffff; /* no joystick */
break; break;
case 0x3ba:
case 0x3da:
res = (DWORD)VGA_ioport_in( port );
break;
default: default:
WARN("Direct I/O read attempted from port %x\n", port); WARN("Direct I/O read attempted from port %x\n", port);
res = 0xffffffff; res = 0xffffffff;
@ -385,10 +392,6 @@ void IO_outport( int port, int size, DWORD value )
switch (port) switch (port)
{ {
case 0x3c8:
case 0x3c9:
VGA_ioport_out( port, (BYTE)value );
break;
case 0x20: case 0x20:
DOSVM_PIC_ioport_out( port, (BYTE)value ); DOSVM_PIC_ioport_out( port, (BYTE)value );
break; break;
@ -397,74 +400,79 @@ void IO_outport( int port, int size, DWORD value )
case 0x42: case 0x42:
{ {
BYTE chan = port & 3; BYTE chan = port & 3;
WORD oldval = 0;
if ( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) || /* we need to get the oldval before any lo/hi byte change has been made */
/* we need to get the oldval before any lo/hi byte change has been made */ if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
(tmr_8253_byte_toggle[chan] == FALSE) ) !tmr_8253[chan].byte_toggle)
oldval = tmr_8253_countmax[chan]; tmr_8253[chan].oldval = tmr_8253[chan].countmax;
switch (tmr_8253_ctrlbyte_ch[chan] & 0x30) switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
{ {
case 0x00: case 0:
break; /* correct ? */ break; /* shouldn't happen? */
case 0x10: /* write lo byte */ case 1: /* write lo byte */
tmr_8253_countmax[chan] = tmr_8253[chan].countmax =
(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value; (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
break; break;
case 0x30: /* write lo byte, then hi byte */ case 3: /* write lo byte, then hi byte */
tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */ tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
if (tmr_8253_byte_toggle[chan] == TRUE) if (tmr_8253[chan].byte_toggle)
{ {
tmr_8253_countmax[chan] = tmr_8253[chan].countmax =
(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value; (tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
break; break;
} }
/* else [fall through if write hi byte !] */ /* else [fall through if write hi byte !] */
case 0x20: /* write hi byte */ case 2: /* write hi byte */
tmr_8253_countmax[chan] = tmr_8253[chan].countmax =
(tmr_8253_countmax[chan] & 0xff)|((BYTE)value << 8); (tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
break; break;
} }
if ( /* if programming is finished and value has changed
/* programming finished ? */ then update to new value */
( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) || if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
(tmr_8253_byte_toggle[chan] == FALSE) ) !tmr_8253[chan].byte_toggle) &&
/* update to new value ? */ (tmr_8253[chan].countmax != tmr_8253[chan].oldval))
&& (tmr_8253_countmax[chan] != oldval) set_timer_maxval(chan, tmr_8253[chan].countmax);
)
set_timer_maxval(chan, tmr_8253_countmax[chan]);
} }
break; break;
case 0x43: case 0x43:
{ {
BYTE chan = ((BYTE)value & 0xc0) >> 6; BYTE chan = ((BYTE)value & 0xc0) >> 6;
/* ctrl byte for specific timer channel */
/* ctrl byte for specific timer channel */ if (chan == 3)
tmr_8253_ctrlbyte_ch[chan] = (BYTE)value; {
if (chan == 3) { FIXME("8254 timer readback not implemented yet\n");
FIXME("8254 timer readback not implemented yet\n"); break;
} }
else switch (((BYTE)value & 0x30) >> 4)
if (((BYTE)value&0x30)==0) { /* latch timer */ {
tmr_8253_latched[chan] = TRUE; case 0: /* latch timer */
dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0)); tmr_8253[chan].latched = TRUE;
if (chan == 0) /* System timer divisor */ dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
tmr_8253_latch[0] = dummy_ctr+(WORD)DOSVM_GetTimer(); if (chan == 0) /* System timer divisor */
else tmr_8253[chan].latch = dummy_ctr + (WORD)DOSVM_GetTimer();
{ /* FIXME: intelligent hardware timer emulation needed */ else
tmr_8253_latch[chan] = dummy_ctr; {
} /* FIXME: intelligent hardware timer emulation needed */
} tmr_8253[chan].latch = dummy_ctr;
if ((value & 0x30) == 0x30) /* write lo byte, then hi byte */ }
tmr_8253_byte_toggle[((BYTE)value & 0xc0) >> 6] = FALSE; /* init */ break;
} case 3: /* write lo byte, then hi byte */
break; tmr_8253[chan].byte_toggle = FALSE; /* init */
/* fall through */
case 1: /* write lo byte only */
case 2: /* write hi byte only */
tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
break;
}
}
break;
case 0x61: case 0x61:
parport_8255[1] = (BYTE)value; parport_8255[1] = (BYTE)value;
if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253_countmax[2] != 1)) if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
{ {
TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253_countmax[2]); TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
Beep(1193180 / tmr_8253_countmax[2], 20); Beep(1193180 / tmr_8253[2].countmax, 20);
} }
break; break;
case 0x70: case 0x70:
@ -473,6 +481,10 @@ void IO_outport( int port, int size, DWORD value )
case 0x71: case 0x71:
cmosimage[cmosaddress & 0x3f] = (BYTE)value; cmosimage[cmosaddress & 0x3f] = (BYTE)value;
break; break;
case 0x3c8:
case 0x3c9:
VGA_ioport_out( port, (BYTE)value );
break;
default: default:
WARN("Direct I/O write attempted to port %x\n", port ); WARN("Direct I/O write attempted to port %x\n", port );
break; break;