mirror of
https://github.com/wwarthen/RomWBW.git
synced 2026-02-06 14:11:48 -06:00
99 lines
2.1 KiB
C
99 lines
2.1 KiB
C
/* video.c 11/13/2012 dwg - */
|
||
|
||
#include "std.h"
|
||
#include "applvers.h"
|
||
#include "diagnose.h"
|
||
|
||
#define VDA_N8 4
|
||
#define VDAINI 0x40
|
||
#define VDAQRY 0x41
|
||
#define VDARES 0x42
|
||
#define VDASCS 0x43
|
||
|
||
int vdaini(devunit,vidmode,bitmapp)
|
||
unsigned int devunit;
|
||
unsigned int vidmode;
|
||
unsigned int bitmapp;
|
||
{
|
||
hregbc = (VDAINI << 8) | devunit;
|
||
printf("hregbc = 0x%04x\n",hregbc);
|
||
hregde = vidmode;
|
||
printf("hregde = 0x%04x\n",hregde);
|
||
hreghl = bitmapp;
|
||
printf("hreghl = 0x%04x\n",hreghl);
|
||
diagnose();
|
||
printf("VDAINI called, return code was 0x%02x\n",hrega);
|
||
return hrega;
|
||
}
|
||
|
||
bitlook()
|
||
{
|
||
unsigned char *p;
|
||
int ascii,row;
|
||
|
||
p = 0x8000;
|
||
for(ascii=0;ascii<256;ascii++) {
|
||
printf("ascii = 0x%02x ",ascii);
|
||
for(row=0l;row<8;row++) {
|
||
printf("0x%02x ",*p++);
|
||
}
|
||
printf("\n");
|
||
}
|
||
}
|
||
|
||
int vdaqry(devunit,bitmapp)
|
||
unsigned int devunit;
|
||
unsigned int bitmapp;
|
||
{
|
||
hregbc = (VDAQRY << 8) | devunit;
|
||
printf("hregbc = 0x%04x\n",hregbc);
|
||
hreghl = bitmapp;
|
||
|
||
if(hreghl != 0x8000) printf("vdaqry says hl != 0x8000\n");
|
||
|
||
diagnose();
|
||
printf("VDAQRY called, status was 0x%02x\n",hrega);
|
||
printf(" video mode was 0x%02x\n",hregbc & 255);
|
||
printf(" row count was 0x%02x(%d)\n",
|
||
(hregde >> 8),(hregde >> 8) );
|
||
printf(" column count was 0x%02x(%d)\n",
|
||
hregde & 255, hregde & 255);
|
||
if(0 != bitmapp) {
|
||
printf("vdaqry called with bitmap pointer\n");
|
||
bitlook();
|
||
}
|
||
|
||
|
||
|
||
return hrega;
|
||
}
|
||
|
||
|
||
int main(argc,argv)
|
||
int argc;
|
||
char *argv[];
|
||
{
|
||
unsigned char * p;
|
||
unsigned char byte;
|
||
int offs;
|
||
int retcode;
|
||
|
||
printf("video.com(c) 11/15/2012 dwg - \n\n");
|
||
|
||
retcode = vdaini(VDA_N8 << 4,0,0);
|
||
printf("status returned from vdaini was 0x%04x(%d)\n",retcode,retcode);
|
||
|
||
retcode = vdaqry(VDA_N8 << 4,0x8000);
|
||
printf("status returned from vdaqry was 0x%04x(%d)\n",retcode,retcode);
|
||
|
||
p = 0x8000;
|
||
for(offs=0;offs<256*8;offs++) {
|
||
byte = *p;
|
||
byte = byte ^ 255;
|
||
*p = byte;
|
||
p++;
|
||
}
|
||
vdaini(VDA_N8 << 4, 0, 0x8000);
|
||
}
|
||
|
||
|