Two old and remarkable machines, but no idea of the dates when they were built.
They are complete implementations of a Model III TRS-80 in homebuilt S-100 chassis, using a combination of homebuilt and modified commercial S-100 cards.
Both systems run using unmodified copies of the TRS-80 Model III ROMS, and come up with the TRS-80 Model III BASIC prompt. They can run TRS-80 BASIC and machine language programs, and the unit with the disk controller boots Model III TRS-DOS exactly as if it were a factory TRS-80.
13 slot backplane, 32K of memory but no disk controller.
Also a 6 slot backplane, 64K of memory, with a homebrew disk controller and dual diskette drives.
I was just a tad too young and with too little money to participate in the S100 era. But the idea of a dozen cards in a proper case (with proper PSU) is rather attractive.
All the standard file and system maintenance utilities
Several editors, including a fairly decent one which operates line by line or full-screen visual. (The system includes a TTY specification subsystem which allows you to taylor the screen oriented programs to pretty much any terminal.)
HELP : A vax/vms like help command, which provides interactive documentation to all commands, applications and utlities.
ASM : 6809 assembler
RAID : A fairly powerful 6809 debugger.
BASIC : A BASIC interpreter
C : A complete implementation of my Micro-C compiler (in fact the 6809 was the first target for the compiler).
FORTH : A very fast FORTH which compiles to directly executable 6809 machine code instead of threaded lists.
MAPL : A little APL system.
SIM80 : An 8080 simulator - allowed me to run most of the code I had written for my Altair on CUBIX (I included on the disk as examples, an 8080 BASIC interpreter, and an 8080 CHESS program)
