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Fixes for reading latched values with ports 0x40-0x43.
This commit is contained in:
James Abbatiello
Alexandre Julliard
parent
ba0a533669
commit
9ad9e65d64
1 changed files with 110 additions and 98 deletions
170
msdos/ioports.c
170
msdos/ioports.c
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@ -26,14 +26,18 @@
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DEFAULT_DEBUG_CHANNEL(int)
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static WORD tmr_8253_countmax[3] = {0xffff, 0x12, 1}; /* [2] needs to be 1 ! */
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/* if byte_toggle is TRUE, then hi byte has already been written */
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static BOOL16 tmr_8253_byte_toggle[3] = {FALSE, FALSE, FALSE};
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static WORD tmr_8253_latch[3] = {0, 0, 0};
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/* 4th contents are dummy */
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static BOOL16 tmr_8253_latched[4] = {FALSE, FALSE, FALSE, FALSE};
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static BYTE tmr_8253_ctrlbyte_ch[4] = {0x06, 0x44, 0x86, 0};
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static struct {
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WORD countmax;
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BOOL16 byte_toggle; /* if TRUE, then hi byte has already been written */
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WORD latch;
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BOOL16 latched;
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BYTE ctrlbyte_ch;
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WORD oldval;
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} tmr_8253[3] = {
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{0xFFFF, FALSE, 0, FALSE, 0x06, 0},
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{0x0012, FALSE, 0, FALSE, 0x44, 0},
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{0x0001, FALSE, 0, FALSE, 0x86, 0},
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};
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static int dummy_ctr = 0;
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@ -275,54 +279,53 @@ DWORD IO_inport( int port, int size )
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switch (port)
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{
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case 0x3ba:
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case 0x3da:
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res = (DWORD)VGA_ioport_in( port );
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break;
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case 0x40:
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case 0x41:
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case 0x42:
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{
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BYTE chan = port & 3;
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WORD tempval = 0;
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if (tmr_8253_latched[chan] == TRUE)
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if (tmr_8253[chan].latched)
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tempval = tmr_8253[chan].latch;
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else
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{
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tempval = tmr_8253_latch[chan];
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tmr_8253_latched[chan] = FALSE;
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dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
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if (chan == 0) /* System timer counter divisor */
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{
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/* FIXME: DOSVM_GetTimer() returns quite rigid values */
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tempval = dummy_ctr + (WORD)DOSVM_GetTimer();
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}
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else
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{
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dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
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if (chan == 0) /* System timer counter divisor */
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/* FIXME: DOSVM_GetTimer() returns quite rigid values */
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tempval = dummy_ctr+(WORD)DOSVM_GetTimer();
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else
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{ /* FIXME: intelligent hardware timer emulation needed */
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/* FIXME: intelligent hardware timer emulation needed */
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tempval = dummy_ctr;
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}
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}
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switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
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switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
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{
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case 0x00:
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break; /* correct ? */
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case 0x10: /* read lo byte */
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res = (BYTE)tempval;
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case 0:
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res = 0; /* shouldn't happen? */
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break;
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case 0x30: /* read lo byte, then hi byte */
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tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
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if (tmr_8253_byte_toggle[chan] == TRUE)
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case 1: /* read lo byte */
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res = (BYTE)tempval;
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tmr_8253[chan].latched = FALSE;
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break;
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case 3: /* read lo byte, then hi byte */
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tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
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if (tmr_8253[chan].byte_toggle)
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{
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res = (BYTE)tempval;
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break;
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}
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/* else [fall through if read hi byte !] */
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case 0x20: /* read hi byte */
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res = (BYTE)tempval>>8;
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case 2: /* read hi byte */
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res = (BYTE)(tempval >> 8);
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tmr_8253[chan].latched = FALSE;
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break;
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}
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break;
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}
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break;
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case 0x60:
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res = INT_Int09ReadScan(NULL);
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#if 0 /* what's this port got to do with parport ? */
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@ -345,6 +348,10 @@ DWORD IO_inport( int port, int size )
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case 0x201:
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res = 0xffffffff; /* no joystick */
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break;
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case 0x3ba:
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case 0x3da:
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res = (DWORD)VGA_ioport_in( port );
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break;
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default:
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WARN("Direct I/O read attempted from port %x\n", port);
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res = 0xffffffff;
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@ -385,10 +392,6 @@ void IO_outport( int port, int size, DWORD value )
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switch (port)
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{
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case 0x3c8:
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case 0x3c9:
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VGA_ioport_out( port, (BYTE)value );
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break;
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case 0x20:
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DOSVM_PIC_ioport_out( port, (BYTE)value );
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break;
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@ -397,74 +400,79 @@ void IO_outport( int port, int size, DWORD value )
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case 0x42:
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{
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BYTE chan = port & 3;
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WORD oldval = 0;
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if ( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
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/* we need to get the oldval before any lo/hi byte change has been made */
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(tmr_8253_byte_toggle[chan] == FALSE) )
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oldval = tmr_8253_countmax[chan];
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switch (tmr_8253_ctrlbyte_ch[chan] & 0x30)
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/* we need to get the oldval before any lo/hi byte change has been made */
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if (((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
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!tmr_8253[chan].byte_toggle)
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tmr_8253[chan].oldval = tmr_8253[chan].countmax;
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switch ((tmr_8253[chan].ctrlbyte_ch & 0x30) >> 4)
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{
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case 0x00:
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break; /* correct ? */
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case 0x10: /* write lo byte */
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tmr_8253_countmax[chan] =
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(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
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case 0:
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break; /* shouldn't happen? */
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case 1: /* write lo byte */
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
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break;
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case 0x30: /* write lo byte, then hi byte */
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tmr_8253_byte_toggle[chan] ^= TRUE; /* toggle */
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if (tmr_8253_byte_toggle[chan] == TRUE)
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case 3: /* write lo byte, then hi byte */
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tmr_8253[chan].byte_toggle ^= TRUE; /* toggle */
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if (tmr_8253[chan].byte_toggle)
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{
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tmr_8253_countmax[chan] =
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(tmr_8253_countmax[chan] & 0xff00) | (BYTE)value;
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0xff00) | (BYTE)value;
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break;
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}
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/* else [fall through if write hi byte !] */
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case 0x20: /* write hi byte */
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tmr_8253_countmax[chan] =
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(tmr_8253_countmax[chan] & 0xff)|((BYTE)value << 8);
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case 2: /* write hi byte */
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tmr_8253[chan].countmax =
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(tmr_8253[chan].countmax & 0x00ff) | ((BYTE)value << 8);
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break;
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}
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if (
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/* programming finished ? */
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( ((tmr_8253_ctrlbyte_ch[chan] & 0x30) != 0x30) ||
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(tmr_8253_byte_toggle[chan] == FALSE) )
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/* update to new value ? */
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&& (tmr_8253_countmax[chan] != oldval)
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)
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set_timer_maxval(chan, tmr_8253_countmax[chan]);
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/* if programming is finished and value has changed
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then update to new value */
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if ((((tmr_8253[chan].ctrlbyte_ch & 0x30) != 0x30) ||
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!tmr_8253[chan].byte_toggle) &&
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(tmr_8253[chan].countmax != tmr_8253[chan].oldval))
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set_timer_maxval(chan, tmr_8253[chan].countmax);
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}
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break;
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case 0x43:
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{
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BYTE chan = ((BYTE)value & 0xc0) >> 6;
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/* ctrl byte for specific timer channel */
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tmr_8253_ctrlbyte_ch[chan] = (BYTE)value;
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if (chan == 3) {
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if (chan == 3)
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{
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FIXME("8254 timer readback not implemented yet\n");
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break;
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}
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else
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if (((BYTE)value&0x30)==0) { /* latch timer */
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tmr_8253_latched[chan] = TRUE;
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dummy_ctr -= 1+(int) (10.0*rand()/(RAND_MAX+1.0));
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switch (((BYTE)value & 0x30) >> 4)
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{
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case 0: /* latch timer */
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tmr_8253[chan].latched = TRUE;
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dummy_ctr -= 1 + (int)(10.0 * rand() / (RAND_MAX + 1.0));
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if (chan == 0) /* System timer divisor */
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tmr_8253_latch[0] = dummy_ctr+(WORD)DOSVM_GetTimer();
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tmr_8253[chan].latch = dummy_ctr + (WORD)DOSVM_GetTimer();
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else
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{ /* FIXME: intelligent hardware timer emulation needed */
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tmr_8253_latch[chan] = dummy_ctr;
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{
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/* FIXME: intelligent hardware timer emulation needed */
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tmr_8253[chan].latch = dummy_ctr;
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}
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break;
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case 3: /* write lo byte, then hi byte */
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tmr_8253[chan].byte_toggle = FALSE; /* init */
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/* fall through */
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case 1: /* write lo byte only */
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case 2: /* write hi byte only */
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tmr_8253[chan].ctrlbyte_ch = (BYTE)value;
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break;
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}
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if ((value & 0x30) == 0x30) /* write lo byte, then hi byte */
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tmr_8253_byte_toggle[((BYTE)value & 0xc0) >> 6] = FALSE; /* init */
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}
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break;
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case 0x61:
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parport_8255[1] = (BYTE)value;
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if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253_countmax[2] != 1))
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if ((((BYTE)parport_8255[1] & 3) == 3) && (tmr_8253[2].countmax != 1))
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{
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TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253_countmax[2]);
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Beep(1193180 / tmr_8253_countmax[2], 20);
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TRACE("Beep (freq: %d) !\n", 1193180 / tmr_8253[2].countmax);
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Beep(1193180 / tmr_8253[2].countmax, 20);
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}
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break;
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case 0x70:
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@ -473,6 +481,10 @@ void IO_outport( int port, int size, DWORD value )
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case 0x71:
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cmosimage[cmosaddress & 0x3f] = (BYTE)value;
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break;
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case 0x3c8:
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case 0x3c9:
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VGA_ioport_out( port, (BYTE)value );
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break;
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default:
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WARN("Direct I/O write attempted to port %x\n", port );
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break;
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