Jonos Escort
| General Info | |
|---|---|
| Release Year | 1982 |
| Manufacturer | Jonos Computers LTD. |
| Condition | Working |
| Identifiers | |
| Model Number | C2150 |
| Serial Number | 238 |
| Technical Specifications | |
| Software Environment | CP/M |
| CPU | Z80A @ 6MHz |
| Removable Storage | 3.25" FDD |
| Sound | Piezo speaker |
| Display Interface | Composite |
| External Connectors |
|
| Power Requirements | |
| Input Voltage | 120V AC |
| Power Connector | IEC C13/C14 Socket |
| QR Code | |
 | |
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 do not use the later 3.5" 34 pin interface standard on later drives but may be adapted to it with a rewired cable.
Floppy Disk Format
Greaseweazle - diskdef
# Jonos Escort CP/M disk jonos.dd cyls = 70 heads = 1 tracks * ibm.mfm secs = 9 bps = 512 interleave = 2 end end
Linux path: ~/.local/lib/python3.10/site-packages/greaseweazle/data/diskdefs.cfg
cpmtools - diskdef
# Jonos Courier/Escort C2100 diskdef jonos35 seclen 512 tracks 70 sectrk 9 blocksize 2048 maxdir 64 boottrk 2 os 3 end
Linux path: /etc/cpmtools/diskdefs
Photos
System Chassis
STD Boards
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Floppy Controller (top)
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Floppy Controller (bottom)
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Monitor and Keyboard interface (top)
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Monitor and Keyboard interface (bottom)
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RTC, LPT Parallel, additional 64k RAM, external video out for C2150 (top)
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RTC, LPT Parallel, additional 64k RAM, external video out for C2150 (bottom)
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CPU and Serial (top)
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CPU and Serial (bottom)
Archived Media
- ROMs from STD cards: https://archive.org/details/capture000021
External links
- CP/M 3.0 System Disks: https://oldcomputers-ddns.org/public/pub/archiv/maslin/masl-dsk/images-97/jonos/index.html