ISA Memory Expander - Engineering Application
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
CGA/MDA Video Adapter Lab - Engineering Application
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
XT-Emporium