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adjustments for MAME

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git-svn-id: file:///home/notaz/opt/svn/PicoDrive@164 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2007-06-17 12:24:13 +00:00
parent e362c57310
commit a67855765d
9 changed files with 245 additions and 216 deletions
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21
cpu/Cyclone/config.h
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@ -15,10 +15,10 @@
* Enable this option if you are going to use Cyclone to emulate Genesis /
* Mega Drive system. As VDP chip in these systems had control of the bus,
* several instructions were acting differently, for example TAS did'n have
* the write-back phase. That will be emulated, if this option is enebled.
* the write-back phase. That will be emulated, if this option is enabled.
* This option also alters timing slightly.
*/
#define CYCLONE_FOR_GENESIS 1
#define CYCLONE_FOR_GENESIS 1
/*
* This option compresses Cyclone's jumptable. Because of this the executable
@ -29,14 +29,23 @@
*/
#define COMPRESS_JUMPTABLE 1
/*
* Address mask for memory hadlers. The bits set will be masked out of address
* parameter, which is passed to r/w memory handlers.
* Using 0xff000000 means that only 24 least significant bits should be used.
* Set to 0 if you want to mask unused address bits in the memory handlers yourself.
*/
#define MEMHANDLERS_ADDR_MASK 0xff000000
/*
* Cyclone keeps the 4 least significant bits of SR, PC+membase and it's cycle
* count in ARM registers instead of the context for performance reasons. If you for
* any reason need to access them in your memory handlers, enable the options below,
* otherwise disable them to improve performance.
* Warning: the PC value will not point to start of instruction (it will be middle or
* end), also updating PC is dangerous, as Cyclone may internally increment the PC
* before fetching the next instruction and continue executing at wrong location.
* PC value will point to start of instruction currently executed.
* Warning: updating PC in memhandlers is dangerous, as Cyclone may internally
* increment the PC before fetching the next instruction and continue executing
* at wrong location.
*/
#define MEMHANDLERS_NEED_PC 0
#define MEMHANDLERS_NEED_FLAGS 0
@ -70,7 +79,7 @@
* If enabled, UnrecognizedCallback is called if an invalid opcode is
* encountered. All context members are valid and can be changed. The handler
* should return zero if you want Cyclone to gererate "Illegal Instruction"
* exception after this, or nonzero if not. In the later case you shuold change
* exception after this, or nonzero if not. In the later case you should change
* the PC by yourself, or else Cyclone will keep executing that opcode all over
* again.
* If disabled, "Illegal Instruction" exception is generated and execution is