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Handling interrupted SGB commands

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This commit is contained in:
Lior Halphon 2018-11-17 12:26:07 +02:00
parent af5ef50cf9
commit 67d52b78b6
1 changed files with 7 additions and 2 deletions
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9
Core/sgb.c
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@ -69,7 +69,6 @@ static void command_ready(GB_gameboy_t *gb)
Checksum: Simple one byte sum for the following content bytes Checksum: Simple one byte sum for the following content bytes
0xE content bytes. The last command, FB, is padded with zeros, so information past the header is not sent. */ 0xE content bytes. The last command, FB, is padded with zeros, so information past the header is not sent. */
if ((gb->sgb->command[0] & 0xF1) == 0xF1) { if ((gb->sgb->command[0] & 0xF1) == 0xF1) {
uint8_t checksum = 0; uint8_t checksum = 0;
for (unsigned i = 2; i < 0x10; i++) { for (unsigned i = 2; i < 0x10; i++) {
@ -285,9 +284,15 @@ void GB_sgb_write(GB_gameboy_t *gb, uint8_t value)
case 0: case 0:
if (!gb->sgb->ready_for_pulse) return; if (!gb->sgb->ready_for_pulse) return;
gb->sgb->ready_for_pulse = false;
gb->sgb->ready_for_write = true; gb->sgb->ready_for_write = true;
gb->sgb->ready_for_pulse = false; gb->sgb->ready_for_pulse = false;
if (((gb->sgb->command_write_index) & (SGB_PACKET_SIZE * 8 - 1)) != 0 ||
gb->sgb->command_write_index == 0 ||
gb->sgb->ready_for_stop) {
gb->sgb->command_write_index = 0;
memset(gb->sgb->command, 0, sizeof(gb->sgb->command));
gb->sgb->ready_for_stop = false;
}
if (gb->sgb->player_count > 1 && (value & 0x30) != (gb->io_registers[GB_IO_JOYP] & 0x30)) { if (gb->sgb->player_count > 1 && (value & 0x30) != (gb->io_registers[GB_IO_JOYP] & 0x30)) {
gb->sgb->current_player++; gb->sgb->current_player++;
gb->sgb->current_player &= gb->sgb->player_count - 1; gb->sgb->current_player &= gb->sgb->player_count - 1;