8080 Assembler-Text Editor (ATE)

I wrote my first 8080 assembler as a cross assembler on an IBM 360 mainframe (in fortran iirc)... took advantage of the "scads" of memory available, and wrote it as a single pass which kept the output in core and generated a "fixup" table to patch forward references at the end ... worked, but the listing did not show the byte values for forward referenced symbols correctly, so I abandoned the approach for my next 8080 assembler... Which was a two pass assembler resident on the 8080 machine. One of my first significant micro projects, this was a tiny little editor/assembler which I managed to squeeze into about 2000 bytes so I could put it into a 2716 (Hot new *BIG* EPROM!) - Worked only in hex (didn't support decimal - or octal) - even the editor line numbers were in hex. The mainframe cross assembler is completely gone ... I have no code or copies of any of it anymore. I thought the first resident assembler was also lost, however last year a hand-built machine from the time period came to me with the editor/assembler still in ROM. I've got more details up on the web site (look for "PIMPS"). I even put together an I/O definition file to let my Horizon/Z80 simulator match the I/O of the hand-built board so that you can actually run the thing (just in case anyone has a burning desire to experience come of my earliest code for micros). Dave -- dave06a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html