diff options
Diffstat (limited to 'src/devices/machine/upd765.cpp')
-rw-r--r-- | src/devices/machine/upd765.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/devices/machine/upd765.cpp b/src/devices/machine/upd765.cpp index 4996093e0bd..acf4182fecc 100644 --- a/src/devices/machine/upd765.cpp +++ b/src/devices/machine/upd765.cpp @@ -548,6 +548,8 @@ uint8_t upd765_family_device::fifo_r() uint8_t r = 0xff; switch(main_phase) { case PHASE_CMD: + if(machine().side_effects_disabled()) + return 0x00; if(command_pos) fifo_w(0xff); LOGFIFO("fifo_r in command phase\n"); |