Ancient 6502 FOCAL source code

PAL-65 is the Assembler written by Wayne Wall and friends at the Colorado School of Mines in the mid-'70's and patterened after the PAL-10 assembler for the DEC KA-10 that CSM had at the time. Its syntax, like many DEC products, differs significant ways. The differences fall into two classes: (a) the assembler pseudo-op's, and (b) the instruction syntax. Now, I haven't used this stuff in years, but, instead of EQU, DB, DW, ORG, etc, .DEF, .BYTE, .WORD, .LOC and others. These should be quite recognizable in the early version, e.g. the FOCAL source. Later versions had word operations added as hard-coded macros to parallel what the Apple Assembler had added, just for convenience. The way in which the two deal with the indirection and indexing in the 6502 is different as well, from what was used in "the rest of the industry" ... more or less ... These differences are really quite regular and a few editor macros should fix them without incident. You do have to catch them all, however. I'll eventually have the source and executables for the PAL-65 assembler available as well, though, once again, they'll be the versions for the APEX OS, which means they'll still be of little use to those not using APEX. I have source listings for the earlier standalone version of the assembler, but they're on very aged "green-bar" paper that has deteriorated from quite readable to barely so over the 20+ years they've been around and my attempts to OCR them have been futile, so far. There's also a manual, though I'm not sure I have a machine-readable version of that at all. These will also be made available as I unearth them. Dick ----- Original Message ----- From: "Iggy Drougge" <optimus(a)canit.se> To: "Richard Erlacher" <classiccmp(a)classiccmp.org> Sent: Saturday, September 29, 2001 7:00 AM Subject: Re: Ancient 6502 FOCAL source code