LIM 4.0 focused EMS board and backplane line for pre-386 platforms, designed for deterministic page-frame mapping and predictable software compatibility.

Standard

LIM EMS 4.0 page-frame compatibility

Frame Windows

D000h and E000h profile sets

Capacity Range

2MB to 8MB banked architecture

Configuration

Register maps with conflict-safe presets

Validation Suite

Lotus 1-2-3, QEMM, DOS extender scenarios

Deployment Form

Single-card and modular backplane builds

The Amstrad PC1640 family (1987) helped make affordable IBM PC compatibles mainstream in Europe. This entry tracks a complete PC1640SD setup (monitor + keyboard + boot disk), aligned with the XT-Emporium catalog.

CPU

Intel 8086 @ 8 MHz

RAM

640 KB

Storage

Floppy + HDD variants depending on model

Graphics

CGA/EGA compatible (model dependent)

Manufacturer

Amstrad plc (UK)

Released

1987