I have added images of my recently acquired KIM-1s to the KIM-1 Revisions Images page.

First version. I have a more time correct CPU (ceramic, pre June 1976) 6502 for this board. Needs a cleanup/restore also.

My KIM-1 first version

Rev A. Mostly original board, some small repairs.

My Rev A CPU week 15 1976

Rev G. A high quality unaltered KIM-1.

My second Rev F

The Digital Group made computers with Z80, 8080, 6800 and 6502 as choice.I found a article in MICROTREK magazine 1977 with a review of this computer.

Paul Schroeter gave me the dump of the SYM-2 ROM and photos of the backside.He also scanned his photocopy of the SYM-2 Reference Manual.

More about the SYM-1 and SYM-2 on the Synertek pages

Sources of SYM-1 and SYM-2 Monitor ROMs

Many years ago Paul R.Santa-Maria (who sadly left us in 2012) gave me the listing of the source of the Monitor ROM in the SYM-1 1.1
Delivered as a listing, with the comments from the listing in the SYM-1 Reference manual and formatted close to the printed listing.

This is the heading of the listing:

SYM-1 SUPERMON AND AUDIO CASSETTE INTERFACE SOURCES
COMBINED AND CONVERTED TO TELEMARK ASSEMBLER (TASM) V3.1

0002 0000 ;
0003 0000 ;*****
0004 0000 ;***** COPYRIGHT 1979 SYNERTEK SYSTEMS CORPORATION
0005 0000 ;***** VERSION 2 4/13/79 “SY1.1”

Since the ROM of the SYM-1 1.0, 1.1 and the ROM of the SYM-2 2.0 are available:

• Converted the listing back to source format (TASM32, standard MOS format).
• Created separate source for the SYM-1 1.0 ROM, the SYM-1 1.1 ROM (the original listing) and the SYM-2 ROM.
• Typed in the audio cassette interface sources from the 1.0 reference manual.
• Changed the SYM-2 source to the different hardware (a 6532 at AC00 instead of a VIA) and other (minor) changes.
• Binary output compared to the original ROM dumps as proof the sources match the dumps.

In this archive sources of 1.0, 1.1, 2.0 listings, binary output.

I have found a second KIM-5, also in Germany of the KIM-5.

Photos of a KIM-5 board with the Resident Assembler/Editor 6540 ROMs in a KIM-4 motherboard. Photos from the TECMUMAS, dem Technikmuseum (Matthias Schmitt)

More about the KIM-5 here.