(Configuration in photo may differ from text).

Configured state of Unit 5401723K (2024 Apr).

Configuration

Boards from right to left:

• Replacement front panel interface board.
  • Front-panel.RDY jumpered to S100.pRDY.
  • Jumpers AB, CD & EF present.

• CPU: MITS88-CPU recreation, 8080 at 2MHz.

• JAIR V2.4 board [ref] configured to provide:
  • ROM: Phantom ROM at 0000 for booting. Disabled after booting to provide access to RAM.
  • RAM: Range 0000::FFFF
  • IO: Serial port for console, cable from COM1,1:1 connector on board to DB25F,DCE on rear.
  • IO: A 2nd serial port.
  • IO: Disk interface to SD card.
  • The onboard 8080 CPU is disabled.

The toggle switch on the rear panel controls the fan, not really needed in this configuration.

Jair board.

Booting CP/M

• Attach RS-232 console terminal at 9600,8N1 to console port on rear.

• Press RESET, followed by RUN if machine was stopped.

• After a few seconds, text should appear with several options. By default, after a further 5 seconds the boot process will continue.

• More text will appear, with two options and a prompt at the end. Pressing "c" (or "C") boots to CP/M. Shortly afterwards the CP/M prompt "a>" will appear.

• Executing the "survey" command will present an analysis of the machine configuration.