diff options
Diffstat (limited to 'src/devices/cpu/mcs48/mcs48.cpp')
-rw-r--r-- | src/devices/cpu/mcs48/mcs48.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/devices/cpu/mcs48/mcs48.cpp b/src/devices/cpu/mcs48/mcs48.cpp index 96334465e10..b0f7e4f9fb5 100644 --- a/src/devices/cpu/mcs48/mcs48.cpp +++ b/src/devices/cpu/mcs48/mcs48.cpp @@ -15,6 +15,8 @@ - add special 8022 opcodes (RAD, SEL AN0, SEL AN1, RETI) - according to the user manual, some opcodes(dis/enable timer/interrupt) don't increment the timer, does it affect the prescaler too? + Most likely, timer input (prescaler overflow or T1 edge) still occurs, + just that m_timer increment is delayed 1 opcode. - IRQ timing is hacked due to WY-100 needing to take JNI branch before servicing interrupt **************************************************************************** |