PC 40-40 “Key”
Serial: DA4 014718
The PC 40-40 is a PC 40 with a 40MB hard disk from factory instead of the 20MB one. The unit came without floppy drives and without PSU, but had an 80287 co-processor installed, an additional RAM card and two i/o cards.
It is probably the only existing machine with its original keys 🙂
- Mainboard: NBI 4200:
- Processor: 80286
- Processor Speed: 10MHz
- Onboard Memory: 1MB [512kB/512kB]
- BIOS: Award
- NPU Options: 80287 installed
- Video Card: ATI EGA Wonder Rev. 1 from 1987
- Video RAM: 256kB
- Supports CGA, Hercules mono & EGA graphics modes
- Floppy drives:
- HDD: Hitachi DK521-5:
- Interface: MFM
- Physical Size: 5.25″ HH
- Capacity: 40MB
- Speed: 3,600RPM
- Type 26: 823/6/17
- RAM expansion: 2MB 16 bit ISA card by unknown manufacturer.
- DIP settings:
- 1011111111 = 512kB
- 1011101111 = 1024kB
- 1011100111 = 2048kB
- DIP settings:
- work performed:
- whole machine completely dismantled and cleaned
- PSU recapped with Rubycon 105° caps
- motherboard and all expansion cards recapped, all tantalums replaced with Rubycon 105° aluminum caps
- small spots on metal cover and chassis repainted
- internal battery velcro re-attached
- all metal slot covers restored to former shine and glory
- missing floppy drives and missing PSI replaced
- one corner of the front badge re-glued
- damaged stickers on the back halfway re-attached
- missing floppy grounding wires replaced
- HDD backup [Ghost 2]
- notes:
- right-back case screw does not fit, the thread hole is half-covered by the case cover. Put smaller screw in.
- RAM card issue: only 1MB working, everything above is FFFFFFFF.
