MAME Debugger commands

A [<update>]
        Animate (trace) and update display once per frame [or every <update> opcodes only]

D <1|2> <address>
        Display memory <1|2> starting at <address>

E <1|2> [<address>]
        Edit memory window <1|2> [at <address>]

M <1|2> [BYTE|WORD|DWORD]
        Change memory window mode to default [to BYTE|WORD|DWORD (or 0|1|2)]

F
	Fast

G [<address>]
        Go [and break at <address>]

J <address>
        Jump to <address> in disassembly window

R <register> <value>
        Replace <register> with <value> (<value> may also be a <register>)

BP, BPX <address> [<times>]
        Break on execution of <address> [after ignoring it <times>]

BC
	Clear execution breakpoint

RP <register> [<value> [<mask>]]
        Break if <register> changes [to <value> [compare after applying <mask>]]

RC
        Clear register watchpoint
WP, BPW <address> [<value>]
	Break if data at <address> changes [to <value>]

WC
	Clear data watchpoint

HERE
	Run to cursor

DASM <filename> <start> <end> [<boolean>]
	Disassemble to <filename> from address <start> to <end>
	Opcode dump on by default [OFF|NO|0 without]

DUMP <filename> <start> <end> [<data size> [<ASCII mode> [<prog/data memory>]]]
	Dump to <filename> from address <start> to <end>
	[data size BYTE|WORD|DWORD (also 0|1|2)]
	[ASCII mode OFF|TRANSLATE|FULL (also 0|1|2)]
	[PROG or DATA memory (also 0|1) for CPUs supporting it]

TRACE {<filename> [<reg1> [<reg2>...]]}|OFF
	Trace to <filename> [dumping <reg1> [<reg2>...]] | OFF to stop tracing.

SAVE <filename> <start> <end> [OPCODES|DATA]
	Save binary to <filename> from address <start> to <end>
	[either OPCODES (from OP_ROM, default) or DATA (from OP_RAM), also 0|1].

SCANLINE
	Toggles the display of scanlines

IGNORE <cpunum>
	Ignore CPU #<cpunum> while debugging or tracing

OBSERVE <cpunum>
	Observe CPU #<cpunum> while debugging or tracing

REPEAT rate
	Set keyboard initial repeat rate (rate/frame will increase to 1/frame)

CASE DEFAULT|LOWER|UPPER (also 0|1|2)
	Set disassembly case style.

OPCODES <boolean>
	Display opcodes in disassembly window

RELATIVE <boolean>
	Display relative jump addresses in disassembly window

SQUEEZE <boolean>
	Allow squeezed memory display

COLOR <element> <foreground> [<background>]
	Set <element> color to <foreground> on BLACK [or <background>].
	For a list of <elements> and <colors> see mamedbg.cfg

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PGUP	 Move cursor up one page in disassembly window
PGDN	 Move cursor down one page in disassembly window
HOME	Move cursor to first page in disassembly window
END	Move cursor to last page in disassembly window
LEFT	Back to the previous point in 'follow history'
RIGHT	Follow the current instruction's code or data reference
TAB	Switch between windows (backwards SHIFT+TAB)
D	Change disassembly case style to default
L	Change disassembly case style to lower case
U	Change disassembly case style to upper case
M	Toggle disassembly opcode display mode
H	Toggle between hex, ASCII and full character set mode
P	Toggle memory display between DATA and PROGRAM memory (Harvard-architecture CPUs)
I	Toggle memory display between CPU internal and normal memory
M	Switch memory display mode between bytes, words and dwords
S	Search memory for a sequence of bytes
F1	Help - maybe you realized this ;)
F2	Toggle breakpoint at current cursor position
F4	Set data watchpoint to current memory location
F6	Set the focus to the next (not ignored) CPU
F8	Step one instruction
F9	Animate (trace) at speed set by last \"A\" command
F10	Step over instruction at cursor (ie. execute call, jsr or bsr)
F12	Go!
ESC	Go!