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#include "atari.h"
#include "cpu.h"
#include "log.h"
#include <time.h>
#define FALSE 0
#define TRUE 1
static char *rcsid = "$Id: supercart.c,v 1.5 1998/02/21 14:51:54 david Exp $";
extern UBYTE *cart_image;
extern int cart_type;
static int rtime_state = 0;
/* 0 = waiting for register # */
/* 1 = got register #, waiting for hi nybble */
/* 2 = got hi nybble, waiting for lo nybble */
static int rtime_tmp = 0;
static int rtime_tmp2 = 0;
static int regset[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
int hex2bcd(int h)
{
return(((h/10) << 4) | (h % 10));
}
int gettime(int p)
{
time_t tt;
struct tm *lt;
tt = time(NULL);
lt = localtime(&tt);
switch (p) {
case 5:
return(hex2bcd(lt->tm_year));
case 4:
return(hex2bcd(lt->tm_mon));
case 3:
return(hex2bcd(lt->tm_mday));
case 2:
return(hex2bcd(lt->tm_hour));
case 1:
return(hex2bcd(lt->tm_min));
case 0:
return(hex2bcd(lt->tm_sec));
case 6:
return(hex2bcd(((lt->tm_wday+2)%7)+1));
}
return(0);
}
void fillarray()
{
regset[0] = gettime(0);
regset[1] = gettime(1);
regset[2] = gettime(2);
regset[3] = gettime(3);
regset[4] = gettime(4);
regset[5] = gettime(5);
regset[6] = gettime(6);
}
UBYTE SuperCart_GetByte(UWORD addr)
{
/* Aprint("d5xx read @ 0x%x", addr); */
if (addr == 0xb8 || addr == 0xb9) {
fillarray();
switch(rtime_state) {
case 0:
/* Aprint("pretending rtime not busy, returning 0"); */
return(0);
case 1:
if (rtime_tmp > 5)
Aprint("returning %d as hi nybble of register %d",
regset[rtime_tmp] >> 4, rtime_tmp);
rtime_state = 2;
return(regset[rtime_tmp] >> 4);
case 2:
if (rtime_tmp > 5)
Aprint("returning %d as lo nybble of register %d",
regset[rtime_tmp] & 0x0f, rtime_tmp);
rtime_state = 0;
return(regset[rtime_tmp] & 0x0f);
}
}
return(0);
}
int SuperCart_PutByte(UWORD addr, UBYTE byte)
{
/* Aprint("d5xx write: 0x%x @ 0x%x", byte, addr); */
if (addr == 0xd5b8 || addr == 0xd5b9) {
switch (rtime_state) {
case 0:
if (byte > 5)
Aprint("setting active register to %d", byte);
rtime_tmp = byte;
rtime_state = 1;
break;
case 1:
if (rtime_tmp > 5)
Aprint("got %d as hi nybble of register %d",
byte, rtime_tmp);
rtime_tmp2 = byte << 4;
rtime_state = 2;
break;
case 2:
if (rtime_tmp > 5)
Aprint("got %d as lo nybble, register %d now = %d",
byte, rtime_tmp, rtime_tmp2 | byte);
rtime_tmp2 |= byte;
regset[rtime_tmp] = rtime_tmp2;
rtime_state = 0;
break;
}
return FALSE;
}
switch (cart_type) {
case OSS_SUPERCART:
switch (addr & 0xff0f) {
case 0xd500:
if (cart_image)
memcpy(memory + 0xa000, cart_image, 0x1000);
break;
case 0xd504:
if (cart_image)
memcpy(memory + 0xa000, cart_image + 0x1000, 0x1000);
break;
case 0xd503:
case 0xd507:
if (cart_image)
memcpy(memory + 0xa000, cart_image + 0x2000, 0x1000);
break;
}
break;
case DB_SUPERCART:
switch (addr & 0xff07) {
case 0xd500:
if (cart_image)
memcpy(memory + 0x8000, cart_image, 0x2000);
break;
case 0xd501:
if (cart_image)
memcpy(memory + 0x8000, cart_image + 0x2000, 0x2000);
break;
case 0xd506:
if (cart_image)
memcpy(memory + 0x8000, cart_image + 0x4000, 0x2000);
break;
}
break;
default:
break;
}
return FALSE;
}
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