8870 LFI List

Everything in a Nixdorf machine has an LFI plate stamped or stuck on it; basically a unique part number. This list will give the main LFI numbers for 8870/Quattro machines.

1528-01

DAP4 VDU CPU Processor 16K RAM

1528-03

DAP4 VDU CPU Processor 32K RAM

1528-05

DAP4 VDU CPU Processor 64K RAM (no old EPROM support)

1530-00

Hardware Arithmetic Unit

1537-01 (usually combined with a 1641-xx)

CPU Module (2 plates) and is usually attached to an internal memory module.

1559-xx (usually combined with a 1641-xx)

CPU Module (2 plates) and is usually attached to an internal memory module. Final variant of the 16-bit CPU

1641-00

Internal memory for CPU. 256Kb or 512Kb

1642-00

External memory. 512Kb

1642-01

External memory. 256Kb

1860-02

PLC2 (2 channel) Programmable Line Controller

ALME – Asynchronous Line Multiplexer Extended

1883-01 / 02

5 1/4″ Floppy Disk Controller

2549-00

MD/SMC Controller

3038-02

Battery Backup + CPU Reset switch

3109-02

Chassis PSU

3630-05

M25 Peripheral Tier (top level) backplane


Leave a Reply