User wikokim on the bought this system in 1978/79. And published the following documents and ROM dumps.

The ESCO 1 was DM 520, the ESCO Monitor DM 460 (German Marks). The backplane was DM 190. He added a 16KB Static Memory Card from KF (?) and modified the Card to work with the ESCO Bus. He also made a LED based Bus Monitor including the KIM-1 based Single Cycle /Single Step Logic.

ESCO stands for Europa Single Board Computer.
The ESCO system was desigend and sold by the firm Neumüller. The firm still exist, though they remember nothing about the ESCO.

The ESCO SBC has:

  • 4 SRAMS TMS4045 makes 2K RAM
  • several address decoders, including 145 like the KIM-1
  • A 4MHz crystal, divided to 2 MHz or less MHz.Since the 6502 is the 1 MHz NMOS part, likely 1 MHz
  • the 6820 is a PIA, the empty slot is for a second PIA
  • 4 IC sockets for2516 EPROMS, here with monitor and an Editor/Assembler

The optional ESCO monitor, consisting of a EuroCard and a separate keyboard PCB, with the usual hex keybaord, 6 seven segment LED displays, audio cassette interface, and a serial 20 mA TTY interface.

Texteditor and Assembler in action. Started Texteditor with “Q” (home made ESCO Monitor extension q $8000). Then “T” to start Texteditor. “TEXT:” entered 2000 (start of texteditor Storage Area). “N Or O” for new or old Text. Entered “O” , “2000 2038 0005” Text Start @2000 to 2038 5 Lines entered . “A T” Starts Assembler 1 Pass to Terminal (SYMS, SYME, Code left default) . “D” Starts pass 2 to terminal.

Available documents and ROM dumps:

Brochure ESCO and ESCO Monitor
ESCO Assembler Editor.pdf
ESCO-1 Monitor
ESCO Assembler editor part 1 E000
ESCO Assembler editor part 2 E800
ESCO Assembler editor part 3 F000
ESCO Assembler editor combined in 6K ROM image