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SITU-SOL is a programming environment for 6502-based computers that was written by hand during RetroChallenge 07/2015.
This repository contains the following supporting tools, written in BASIC:
binloader, the first version of the simulated bit-entering facility, used in the warm-up
frontpanel, the improved version of the front-panel simulator, used to enter SITU-MON
BASIC sources for these are in
src; the tokenized PRG files are in
Note that these programs begin writing to memory at $8100, which is normally inside the memory range that BASIC will also use — thus you are in danger of BASIC overwriting what you enter with its own variable data. So, to safely run either of these programs, you should do something like this:
POKE 56,128:NEW LOAD "FRONTPANEL",8 RUN
situ-monis a PRG file containing a dump of what memory $8100-$81FF looked like just after SITU-MON was entered and fixed. You can run it from BASIC immediate mode like so:
LOAD "SITU-MON",8,1 SYS 33024
situ-solis a PRG file containing a dump of what memory $8100-$8520 looked like just after SITU-SOL was entered and fixed. It also includes SITU-MON — because SITU-SOL calls routines from it — and 256 bytes of almost-unused code between $8200 and $82FF.
It can be started from BASIC immediate mode like so:
LOAD "SITU-SOL",8,1 POKE 2304,0:SYS 33830
But! There is no symbal table. (The
POKE 2304,0is to stop SITU-SOL from mistakenly behaving as if there's a symbal table at that address, in case that byte isn't zero.) You may wish to load a symbal table first, but I haven't got one handy, yet.
This repository might, at some point, also contain text files containing disassembled machine code that was entered.