Jonos Escort

This is a portable CP/M computer with an STD back plane for system cards and expansion. The C2150 model shown here came with an additional card to add LPT Parallel, 64KB of RAM, video output(unconfirmed), and an RTC.

The front of the computer only has three controls, main power, reset, and CRT intensity.

The Sony floppy drives in the machine are very early models and may need the shutter held open before putting them in the machine.

Repairs - Modifications
A note for working on this machine, the front faceplate uses Velcro strips to hold it to the internal cage. So you will hear a "tearing" sound when you slide the cage out. The keyboard faceplate is also held on this way, the keyboard cable is on a connector on both ends as well.

2023-09

 * Unit was not shipped well and needed to have components secured back in place. No permanent damage from shipping appears to have occurred.
 * Sony floppy drives needed cleaning and relubrication

Floppy Disk Drives
My unit from mid 1983 shipped with Sony OA-D31V, these have the shutter opening arm included but it is possible other units may have OA-D30V without the arm. These drives have do not use the later 3.5" 34 pin interface standard on later drives but may be adapted to it with a rewired cable.

Greaseweazle - diskdef
disk jonos.dd   cyls = 70 heads = 1 tracks * ibm.mfm secs = 9 bps = 512 interleave = 2 end end Linux path:
 * 1) Jonos Escort CP/M

cpmtools - diskdef
diskdef jonos35 seclen 512 tracks 70 sectrk 9 blocksize 2048 maxdir 64 boottrk 2 os 3 end Linux path:
 * 1) Jonos Courier/Escort C2100

Archived Media

 * ROMs from STD cards: https://archive.org/details/capture000021