MHMON

Monitor ROM for my 65C02 system

Floppy/FAT12 Support

Supports reading FAT12 floppies and running programs from them
There is no support for writing or directories (yet)

Functions (subject to change)

Name	Address	Arguments	Returns	Notes
CHARIN	E000	none	A: Character, Carry set if character available	Non-blocking, if Carry is clear no char was returned
CHAROUT	E003	A: Character to send
CRLF	E006			Print Carriage return & Linefeed
RESERVED	E009
RESERVED	E00C
CLS	E00F			CLear Screen
HEXTOASC	E012	A: Hex number to print
CHARINW	EO15		A: Character	Waits for a character before returning
HEXOUT	E018	A: Hex nibble to print		Print hex nibble
CHARINU	E01B		A: Character	Returns input character converted to uppercase
FOPEN	E01E			TODO: document
FCLOSE	E021			TODO: document
FREAD	E024			TODO: document
ERRMSG	E027			TODO: document

Commands

All arguments (Except filename) must be entered as hex digits

Command	Arguments	Description	Example
B		Print colour bars	B
C		Clear Screen	C
D	<start address> [end address]	Display memory addresses	D 0100
E	<pathspec>	Execute program from disk	E A:EHBASIC.COM
F	<start> <end> <value>	Fill memory with a specific value	F 1000 2000 FF
J	<addr>	Jump to program	J 1000
L		Load from SREC	L
M		Memory test	M
R	<addr>	Read memory location	R 0100
S	<seconds>	Sleep	S 0A
W	<addr> <value> [<value> ...]	Write memory location(s)	W 0100 AA
?		Display help	?