diff options
| author | Michael Pavone <pavone@retrodev.com> | 2017-01-03 20:42:15 -0800 |
|---|---|---|
| committer | Michael Pavone <pavone@retrodev.com> | 2017-01-03 20:42:15 -0800 |
| commit | c562554ca59360448c10c6e3e9444d35dd464e47 (patch) | |
| tree | 6738bea3e904884aeb6ee249e347f60c756ae716 /sms.c | |
| parent | dd774975c0ba188b8d18d97e931a625f4e491f21 (diff) | |
Fix handling of IO control writes in SMS mode
Diffstat (limited to 'sms.c')
| -rw-r--r-- | sms.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -12,8 +12,8 @@ static void *memory_io_write(uint32_t location, void *vcontext, uint8_t value) z80_context *z80 = vcontext; sms_context *sms = z80->system; if (location & 1) { - sms->io.ports[0].control = ~(value << 5 & 0x60); - sms->io.ports[1].control = ~(value << 3 & 0x60); + sms->io.ports[0].control = (~value) << 5 & 0x60; + sms->io.ports[1].control = (~value) << 3 & 0x60; io_data_write(sms->io.ports, value << 1, z80->current_cycle); io_data_write(sms->io.ports + 1, value >> 1, z80->current_cycle); } else { |