ekeeke
48e3321261
[Core/CPU] fixed sub 68K DIVU instruction timings
2019-11-25 17:17:26 +01:00
vadosnaprimer
b24541938a
move cpuhook to a core/debug
2019-04-24 19:55:31 +03:00
vadosnaprimer
d1e7cd6bea
add CPU hooking functionality
...
can be used by a frontend to implement breakpoints or tracelogging
currently hooked: M68K executing/reading/writing, VDP reading/writing (only for MegaDrive)
2019-04-21 20:35:38 +03:00
ekeeke
c953707ef5
[Core/CPU] fixed M68K STOP instruction edge case (case where STOP instruction unmasks pending interrupt)
2019-03-23 13:46:23 +01:00
ekeeke
50dfa94a67
[Core/CPU] fixed 68k timing of BTST Dn,#Imm instruction (verified by Flamewing in original microcode)
2019-01-09 01:08:28 +01:00
Brian Koropoff
fe21bb5950
Tidy up overclock code
...
Also use full available precision for overclock ratio.
2017-10-07 17:24:37 -07:00
Brian Koropoff
f3e0641b1b
Allow more fine-grained overclocking
...
Some games can benefit from a little overclocking but start behaving
strangely at 2x. Make the internal overclock ratio a fixed point
number and add 3 fractional settings.
2017-10-04 22:07:45 -07:00
Brian Koropoff
2135365d5c
Add experimental overclock option.
...
This reduces all cycle costs by half for the primary CPU. There
is a delay upon loading before overclocking is applied as a
workaround for some games that detect PAL/NTSC systems by counting
cycles in a frame at startup.
2017-10-03 16:46:17 -07:00
ekeeke
3fc3a57b26
[Core/68k] fixed NBCD insruction when using register operand
2017-09-25 01:09:09 +02:00
EkeEke
527fd6ecd8
[Core/VDP] improved VDP status read timing accuracy (fixes 'Marvel Land' demo mode)
2017-09-20 10:53:08 +02:00
EkeEke
ee0fd881f6
[Core/CPU] removed 68k stack access optimizations to prevent unintentional (or intentional) ROM corruption
2017-05-08 16:35:05 +02:00
EkeEke
9810f9d34b
[Core/CPU] minor optimization to 68k read/write handlers
2017-05-08 15:59:32 +02:00
EkeEke
5a74df31ee
[Core/CPU] fixed 68k undocumented behaviors for ABCD/SBCD/NBCD instructions (thanks to flamewing for his test ROM)
2017-03-30 15:02:15 +02:00
EkeEke
fa8929eb3d
[Core/CPU] improved 68k auto-vectored interrupts acknowledge cycle timing accuracy (fixes background color corruption during Bubsy cutscenes)
2016-08-15 21:53:12 +02:00
EkeEke
79570c7d4e
[Core/Misc] fixed code formatting
2016-05-01 20:04:40 +02:00
EkeEke
406ee5e6bc
[Core/Misc] code cleanup
2015-10-17 19:12:32 +02:00
EkeEke
2236072ce9
[Core/MCD] improved Main-CPU & Sub-CPU idle loop detection (fixes "Super League CD")
2013-10-21 00:09:50 +02:00
EkeEke
aede1b9299
rearranged core & back-end specific code (part 2)
2013-06-17 22:31:31 +02:00
