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Bodged PIT reads slightly, fixed Lotus III hangs.

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This commit is contained in:
TomW 2014-06-08 15:53:09 +01:00
commit c9fbb6e934
1 changed files with 3 additions and 2 deletions
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5
src/pit.c
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@ -252,7 +252,7 @@ static int pit_read_timer(int t)
// pclog("pit_read_timer: t=%i using_timer=%i m=%i\n", t, pit.using_timer[t], pit.m[t]); // pclog("pit_read_timer: t=%i using_timer=%i m=%i\n", t, pit.using_timer[t], pit.m[t]);
if (pit.using_timer[t]) if (pit.using_timer[t])
{ {
int read = pit.c[t] / PITCONST; int read = (pit.c[t] / PITCONST) - 1;
if (pit.m[t] == 2) if (pit.m[t] == 2)
read++; read++;
if (read < 0) if (read < 0)
@ -274,6 +274,7 @@ void pit_write(uint16_t addr, uint8_t val, void *priv)
int t; int t;
cycles -= (int)PITCONST; cycles -= (int)PITCONST;
// if (val != 0x40) pclog("Write PIT %04X %02X %04X:%08X %i %i\n",addr,val,CS,pc,ins, pit.gate[0]); // if (val != 0x40) pclog("Write PIT %04X %02X %04X:%08X %i %i\n",addr,val,CS,pc,ins, pit.gate[0]);
switch (addr&3) switch (addr&3)
{ {
case 3: /*CTRL*/ case 3: /*CTRL*/
@ -424,7 +425,7 @@ uint8_t pit_read(uint16_t addr, void *priv)
break; break;
} }
// pclog("%02X\n", temp); // pclog("%02X\n", temp);
// printf("%02X %i %i %04X:%04X\n",temp,pit.rm[addr&3],pit.wp,cs>>4,pc); // printf("%02X %i %i %04X:%04X %i\n",temp,pit.rm[addr&3],pit.wp,cs>>4,pc, ins);
return temp; return temp;
} }