Restoration and validation workflow for monochrome and color text-era adapters, including monitor timing and character ROM behavior.

Adapter Modes

MDA, Hercules-compatible, CGA text and graphics

Output Paths

TTL monochrome, composite, RGBI output checks

Clock Profiles

14.31818MHz domain checks and divider validation

ROM Handling

Character ROM preservation and checksum workflow

Display Validation

Geometry, sync, and phosphor persistence tests

Field Scope

Pre-286 display stack bring-up and troubleshooting

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

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