SYM-1 by Ray Holt and Manny Lomas (after Microcomputer Associates they formed Synertek Systems).

Originally called VIM-1, this was a 6502 SBC meant to be a better KIM-1. The design shared the same application connector, so it was possible to produce expansions (the ASK family as Robert Tripp of The Computerist called it).
More I/O (6522’s and the 6532 for the same 6 7 segment LEDs and larger keypad), more RAM (4K), more empty ROM slots, a better monitor (vectored, so easy to interface to new hardware), optional Basic or Resident Assembler Editor.

On these pages a collection of available SYM-1 hardware and software.

• Symtool
• SYM-1 Manuals and Ref cards
• SYM-1 Monitor and RAE
• SYM-1 Pascal and Forth
• SYM-Physis The SYM-1 Users’ Group newsletter
• SYM-1 Basic
• C, Basic, RAE on the SYM-1
• SYM-1 MOD-68 MOD-69
• SYM-1 1541 DOS
  • Galactic Expansion Board
• SYM-1 6502 mini and Maxi SBC
• SYMulator a SYM-1 emulator
• Sym-1 A 6502 Phoenix!
  • Serial Interface
  • SYM-1 to MEGA Connections
  • Extensions to SYM-1 Monitor
  • SYM-1 Mega Filing System
  • SYM-1 Memory Allocation
  • SYM-1 Memory Expansion

• Books on 6502 including SYM-1
• Hardware Expansions
• 6502 magazines