diff options
Diffstat (limited to 'src/devices/cpu/mcs48/mcs48.cpp')
-rw-r--r-- | src/devices/cpu/mcs48/mcs48.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/src/devices/cpu/mcs48/mcs48.cpp b/src/devices/cpu/mcs48/mcs48.cpp index eba06d7a156..dfe68df8b4c 100644 --- a/src/devices/cpu/mcs48/mcs48.cpp +++ b/src/devices/cpu/mcs48/mcs48.cpp @@ -8,12 +8,12 @@ - T0 output clock - get rid of i/o addressmap, use devcb for mcu pins - add CMOS devices, 1 new opcode (01 HALT) - - make timer update cleaner: - timer is updated on S4 while I/O happens on S5 - due to very bad coding, Kaypro 10 keyboard depends on being able to see T=0 before interrupt is taken - right now this is implemented with a hack in the mov_a_t handler - in theory it should also be possible to see the timer flag before the interrupt is taken - mov_t_a should also update the T register after it's incremented + - make timer update cleaner: + timer is updated on S4 while I/O happens on S5 + due to very bad coding, Kaypro 10 keyboard depends on being able to see T=0 before interrupt is taken + right now this is implemented with a hack in the mov_a_t handler + in theory it should also be possible to see the timer flag before the interrupt is taken + mov_t_a should also update the T register after it's incremented */ /*************************************************************************** |