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For those of you hacking in MAME/MESS, I thought I'd share some info on the debugger's expression syntax. This info was found in the source comments at http://mamedev.org/source/src/emu/debug/express.c.html.
[regionname].[physical/logical][space][size]@[address][op][value]
regionname - the name of the memory region you are manipulating. A lot of times this is called maincpu.
physical/logical =
'p' = physical
'l' = logical
Valid physical spaces are program, data, IO, and space3. Default is logical.
space
'p' = program
'd' = data
'i' = IO
'3' = space3
'o' = opcode
'r' = ramwrite
'm' = region
size
'b' = byte
'w' = word
'd' = dword
'q' = qword
addresses and values, when no prefix is used, are seen as hexadecimal. The same goes for a '0x' or '$' prefix. You can specify decimal numbers by prefixing with a '#'.
Pretty much all of the standard operators can be used, whether for assigning or conditionals. The precedence is defined at the top of the source file at the link above.
[regionname].[physical/logical][space][size]@[address][op][value]
regionname - the name of the memory region you are manipulating. A lot of times this is called maincpu.
physical/logical =
'p' = physical
'l' = logical
Valid physical spaces are program, data, IO, and space3. Default is logical.
space
'p' = program
'd' = data
'i' = IO
'3' = space3
'o' = opcode
'r' = ramwrite
'm' = region
size
'b' = byte
'w' = word
'd' = dword
'q' = qword
addresses and values, when no prefix is used, are seen as hexadecimal. The same goes for a '0x' or '$' prefix. You can specify decimal numbers by prefixing with a '#'.
Pretty much all of the standard operators can be used, whether for assigning or conditionals. The precedence is defined at the top of the source file at the link above.
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