As for assemblers for the 64 if you want to do on-the-fly assembly Supermon is cool, there is a version of it in just about all the popular super utility cartridges (i.e. Super Snapshot, Final Cartridge, etc.) As far as more quality (disk based) assemblers I would go with Lew Lasher's Editor Assembler (circa 1985, hard to find, freeware, and nice) or Merlin (especially Merlin 128 for the Commodore 128). Both are good ones to learn with. There are other like Buddy, PAL, Bettwe Working, etc. but those use the BASIC interpreter to code (line numbers and all.) I think the person added it himself. There are four flavors of the Commodore 64. Commodore 64 - The original unit, roundy brownish-grey case dk. brown keyboard, a good machine. Commodore 64c - The updated (low-profile lt.cream case, white keys) cost reduced model unlike other reponses no voices were removed. The story is Commodore did a 'bug fix' on the sound chip that affected games that utilized a perceived flaw on the sound chip that made digitized sound playback easy, on the 64c you can barely hear the digitized segments. Commodore SX-64 - the Commodore 64 in a luggable all-in-one unit included 64, 5" color display, built-in 1541 disk drive and audio speaker. Pretty cool, used original C64 chips though Commodore altered the ROMs to better support the built in drive at the sacrifice of cassette support (and compatibility with some programs and hardware that required it.) Commodore-128 - One of the facets of the Commodore 128 is the C64 mode, the chips reflect the older 64 and is 99.94% perfect in emulation except for one memory location which can bump the computer into 2mgz mode thereby messing up the display provided by the 1mghz 40 column display chip. :/ Some earlier games inadvertanly activate this mode. If I wanted to do only 64 stuff the original grey 64 is the one to get. -- -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- Larry Anderson - Sysop of Silicon Realms BBS (300-2400bd) (209) 754-1363 Visit my Commodore 8-Bit web page at: http://www.goldrush.com/~foxnhare/commodore.html -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-