diff options
| -rw-r--r-- | sms.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -86,12 +86,12 @@ static uint8_t io_read(uint32_t location, void *vcontext) sms_context *sms = z80->system; if (location == 0xC0 || location == 0xDC) { uint8_t port_a = io_data_read(sms->io.ports, z80->current_cycle); - uint8_t port_b = io_data_read(sms->io.ports, z80->current_cycle); + uint8_t port_b = io_data_read(sms->io.ports+1, z80->current_cycle); return (port_a & 0x3F) | (port_b << 6); } if (location == 0xC1 || location == 0xDD) { uint8_t port_a = io_data_read(sms->io.ports, z80->current_cycle); - uint8_t port_b = io_data_read(sms->io.ports, z80->current_cycle); + uint8_t port_b = io_data_read(sms->io.ports+1, z80->current_cycle); return (port_a & 0x40) | (port_b >> 2 & 0xF) | (port_b << 1 & 0x80) | 0x10; } return 0xFF; |