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Fixed bugs that were preventing NVR and Flash files from behind saved;

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A lot of clean ups from waltje;
Start of a directory structure for the code, thanks to waltje.
This commit is contained in:
OBattler
2017-05-06 17:48:33 +02:00
parent e2a717deae
commit f6612fb33b
344 changed files with 2011 additions and 1870 deletions
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56
src/VIDEO/vid_ics2595.c Normal file
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/* Copyright holders: Sarah Walker
see COPYING for more details
*/
/*ICS2595 clock chip emulation
Used by ATI Mach64*/
#include "../ibm.h"
#include "vid_ics2595.h"
enum
{
ICS2595_IDLE = 0,
ICS2595_WRITE,
ICS2595_READ
};
static int ics2595_div[4] = {8, 4, 2, 1};
void ics2595_write(ics2595_t *ics2595, int strobe, int dat)
{
if (strobe)
{
if ((dat & 8) && !ics2595->oldfs3) /*Data clock*/
{
switch (ics2595->state)
{
case ICS2595_IDLE:
ics2595->state = (dat & 4) ? ICS2595_WRITE : ICS2595_IDLE;
ics2595->pos = 0;
break;
case ICS2595_WRITE:
ics2595->dat = (ics2595->dat >> 1);
if (dat & 4)
ics2595->dat |= (1 << 19);
ics2595->pos++;
if (ics2595->pos == 20)
{
int d, n, l;
l = (ics2595->dat >> 2) & 0xf;
n = ((ics2595->dat >> 7) & 255) + 257;
d = ics2595_div[(ics2595->dat >> 16) & 3];
ics2595->clocks[l] = (14318181.8 * ((double)n / 46.0)) / (double)d;
ics2595->state = ICS2595_IDLE;
}
break;
}
}
ics2595->oldfs2 = dat & 4;
ics2595->oldfs3 = dat & 8;
}
ics2595->output_clock = ics2595->clocks[dat];
}