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https://github.com/libretro/snes9x.git
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139 lines
2.9 KiB
C++
139 lines
2.9 KiB
C++
/*****************************************************************************\
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Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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This file is licensed under the Snes9x License.
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For further information, consult the LICENSE file in the root directory.
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\*****************************************************************************/
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#include "snes9x.h"
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#include "memmap.h"
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#include "seta.h"
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static uint8 board[9][9]; // shougi playboard
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static int line = 0; // line counter
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uint8 S9xGetST011 (uint32 Address)
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{
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uint8 t;
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uint16 address = (uint16) Address & 0xFFFF;
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line++;
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// status check
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if (address == 0x01)
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t = 0xFF;
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else
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t = Memory.SRAM[address]; // read directly from s-ram
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#ifdef DEBUGGER
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if (address < 0x150)
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printf("ST011 R: %06X %02X\n", Address, t);
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#endif
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return (t);
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}
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void S9xSetST011 (uint32 Address, uint8 Byte)
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{
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static bool reset = false;
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uint16 address = (uint16) Address & 0xFFFF;
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line++;
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if (!reset)
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{
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// bootup values
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ST011.waiting4command = true;
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reset = true;
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}
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#ifdef DEBUGGER
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if (address < 0x150)
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printf("ST011 W: %06X %02X\n", Address, Byte);
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#endif
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Memory.SRAM[address] = Byte;
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// op commands/data goes through this address
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if (address == 0x00)
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{
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// check for new commands
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if (ST011.waiting4command)
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{
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ST011.waiting4command = false;
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ST011.command = Byte;
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ST011.in_index = 0;
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ST011.out_index = 0;
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switch (ST011.command)
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{
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case 0x01: ST011.in_count = 12 * 10 + 8; break;
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case 0x02: ST011.in_count = 4; break;
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case 0x04: ST011.in_count = 0; break;
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case 0x05: ST011.in_count = 0; break;
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case 0x06: ST011.in_count = 0; break;
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case 0x07: ST011.in_count = 0; break;
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case 0x0E: ST011.in_count = 0; break;
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default: ST011.waiting4command = true; break;
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}
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}
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else
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{
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ST011.parameters[ST011.in_index] = Byte;
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ST011.in_index++;
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}
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}
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if (ST011.in_count == ST011.in_index)
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{
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// actually execute the command
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ST011.waiting4command = true;
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ST011.out_index = 0;
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switch (ST011.command)
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{
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// unknown: download playboard
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case 0x01:
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// 9x9 board data: top to bottom, left to right
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// Values represent piece types and ownership
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for (int lcv = 0; lcv < 9; lcv++)
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memcpy(board[lcv], ST011.parameters + lcv * 10, 9 * 1);
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break;
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// unknown
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case 0x02:
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break;
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// unknown
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case 0x04:
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// outputs
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Memory.SRAM[0x12C] = 0x00;
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//Memory.SRAM[0x12D] = 0x00;
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Memory.SRAM[0x12E] = 0x00;
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break;
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// unknown
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case 0x05:
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// outputs
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Memory.SRAM[0x12C] = 0x00;
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//Memory.SRAM[0x12D] = 0x00;
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Memory.SRAM[0x12E] = 0x00;
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break;
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// unknown
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case 0x06:
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break;
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case 0x07:
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break;
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// unknown
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case 0x0E:
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// outputs
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Memory.SRAM[0x12C] = 0x00;
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Memory.SRAM[0x12D] = 0x00;
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break;
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}
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}
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}
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