From: Aaron Christopher Finney <A_Finney(a)wfi-inc.com> Subject: Re: Mac hi-res monitor [snip] You would also want to look for O/MGH's "6502 Assembly Language Subroutines" by Lance Leventhall as well as Winththrop Saville. The first section contains an excellent overview of the 6502 command set, it's quirks (such as not placing indirect reference commands near page boundries etc. Not to mention the rest with routines for interger and floating point math, string manipulation, sorting, etc.) The routines are fairly generic so it would not be hard to implement on any 6502 machine. I'd consider that and 6502 Assembly Language Programming well worth the effort to find. Larry Anderson -- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Visit our web page at: http://www.goldrush.com/~foxnhare/ Call our Commodore 64 BBS (Silicon Realms 300-2400 baud) at: (209) 754-1363 -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-