Bank-switched memory expansion module tuned for XT, AT, and 286 deployments requiring deterministic mapping, parity instrumentation, and robust coexistence with DMA-heavy workloads.

Capacity Profiles

256KB, 512KB, 1MB address-space maps

Parity Modes

Strict parity enforcement and monitor-only mode

Switching

Hardware DIP plus jumper matrix for deterministic layout

Timing Control

Wait-state presets for weak chipset implementations

Diagnostics Tooling

DOS burn-in suite with map integrity reports

Target Systems

8088, V20, 286, 386SX hybrid benches

COM/LPT/FDC multi-function ISA cards configured for deterministic IRQ and DMA behavior in restoration and industrial control systems.

Interfaces

COM1-COM4, LPT1-LPT3, optional game port and floppy

IRQ Mapping

2, 3, 4, 5, 7 selectable profiles

Address Ranges

3F8h/2F8h/3E8h/2E8h and custom map options

UART Coverage

8250, 16450, 16550A compatibility paths

Tooling

Loopback and parity stress diagnostics

Deployment

Field profile templates for mixed adapter stacks