[ KEYBOARDS AND INTEGRATED POINTING DEVICES // IDENTIFIED COMPONENT ]
IBM 101-Key Enhanced Keyboard (Model M 1390120)
Buckling-spring keyboard, 1980s IBM PC/AT. This file identifies a specific part or clearly bounded model family, rather than an overview of the category.
IDENTIFY THE REVISION: Check the complete product code, suffix, board revision, region, firmware, and date code. Similar names do not guarantee the same hardware.
Part specifications
| Catalog subcategory | Keyboards and integrated pointing devices |
|---|---|
| Catalog identity | IBM 101-Key Enhanced Keyboard (Model M 1390120) |
| Generation / family | Buckling-spring keyboard, 1980s IBM PC/AT |
| Architecture / ratings | 101-key US layout; buckling-spring mechanism; detachable SDL cable; PS/2 or AT adapter depends on cable. |
| Interface / fit | Requires compatible keyboard controller/adapter; SDL cable pinouts are not interchangeable with arbitrary SDL accessories. |
| Variants / field identification | 1390120 is one layout/production series; 1391401 and terminal variants differ. |
| Evidence to collect | Photograph the nameplate and PCB labels; record test system, firmware, installed accessories, condition, and manual/datasheet revision used to verify specifications. |
Compatibility, care & service
- Check electrical signaling, pinout, voltage, current, connector, mounting and supported firmware before installation; do not rely on matching shapes alone.
- Inspect physical condition and manufacturer warnings; mains PSUs, CRTs, batteries and spinning media may retain hazardous energy or require specialist service.
- For vintage equipment, use the correct bus generation, BIOS, driver, media type, cable orientation and resource configuration documented for the machine.
- Record measured results separately from the manufacturer's published limits and state the setup and measurement conditions.
Model-specific notes
Requires compatible keyboard controller/adapter; SDL cable pinouts are not interchangeable with arbitrary SDL accessories.
1390120 is one layout/production series; 1391401 and terminal variants differ.
Sources & further reading
- Manufacturer / standards reference — IBM 101-Key Enhanced Keyboard (Model M 1390120)Source for product-family specifications; compare exact suffix, revision, and region with the unit label. Original page is gone; this is the Internet Archive’s copy.
- Manufacturer / standards reference — IBM 101-Key Enhanced Keyboard (Model M 1390120)Source for product-family specifications; compare exact suffix, revision, and region with the unit label.
Links lead to manufacturer or standards references where available. If a source covers a family, use the exact model's manual as the final authority.