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#include "../copyright"
#include "seta.h"
#include "memmap.h"
ST011_Regs ST011;
uint8_t board[9][9]; /* shougi playboard */
uint8_t S9xGetST011(uint32_t Address)
{
uint8_t t;
uint16_t address = (uint16_t) Address & 0xFFFF;
if (address == 0x01) /* status check */
t = 0xFF;
else /* read directly from s-ram */
t = Memory.SRAM[address];
return t;
}
void S9xSetST011(uint32_t Address, uint8_t Byte)
{
uint16_t address = (uint16_t) Address & 0xFFFF;
static bool reset = false;
if (!reset) /* bootup values */
{
ST011.waiting4command = true;
reset = true;
}
Memory.SRAM[address] = Byte;
if (address == 0x00) /* op commands/data goes through this address */
{
if (ST011.waiting4command) /* check for new commands */
{
ST011.waiting4command = false;
ST011.command = Byte;
ST011.in_index = 0;
ST011.out_index = 0;
switch (ST011.command)
{
case 0x01:
ST011.in_count = 12 * 10 + 8;
break;
case 0x02:
ST011.in_count = 4;
break;
case 0x04:
case 0x05:
case 0x06:
case 0x07:
case 0x0E:
ST011.in_count = 0;
break;
default:
ST011.waiting4command = true;
break;
}
}
else
{
ST011.parameters [ST011.in_index] = Byte;
ST011.in_index++;
}
}
if (ST011.in_count == ST011.in_index) /* Actually execute the command */
{
ST011.waiting4command = true;
ST011.out_index = 0;
switch (ST011.command)
{
case 0x01: /* unknown: download playboard */
{
/* 9x9 board data: top to bottom, left to right */
/* Values represent piece types and ownership */
int32_t lcv;
for (lcv = 0; lcv < 9; lcv++)
memcpy(board[lcv], ST011.parameters + lcv * 10, 9 * 1);
break;
}
case 0x04: /* unknown */
case 0x05:
{
/* outputs */
Memory.SRAM[0x12C] = 0x00;
Memory.SRAM[0x12E] = 0x00;
break;
}
case 0x0E: /* unknown */
{
/* outputs */
Memory.SRAM[0x12C] = 0x00;
Memory.SRAM[0x12D] = 0x00;
break;
}
}
}
}
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