This is through AI search.
The Saft6luck Rev 2.2 Amiga 4000 motherboard is a modern reimplementation of the original A4000 board with numerous upgrades designed to enhance performance, compatibility, and functionality. Here are its features in detail:
Key Enhancements:
1. Memory Improvements:
ChipRAM: 2MB integrated directly onto the PCB (eliminates the need for the 74F841 chip).
FastRAM: Supports up to 112MB using configurable SIMMs (1MB to 64MB per module).
Double-Sided Modules: Compatibility with 2x32MB or 1x128MB configurations.
2. Kickstart Upgrades:
BIGROM Integration: Supports 1MB Kickstart ROMs while remaining compatible with original ROMs.
Kickstart Switch: Integrated to toggle between different ROM configurations.
3. Modern Connectivity:
Clock Port Header: High-speed A1200-compatible clock port for expansions like USB and networking.
I2C Integration: Includes a 3.3V I2C bus for peripherals, with fan controllers and voltage monitors.
4. PCB and Component Design:
Drill Holes: Converted from vias for better reliability during assembly.
Simplified Layout: Removed unused "option" jumpers and unnecessary ICs to streamline the design.
RTC Battery: CR2032 socket with integrated diode fixes.
5. Additional Features:
Fan Support: Three fan headers (2x12V, 1x5V).
H/V Sync Buffers: For enhanced video signal quality.
Power Supply Options: Includes jumper-configured power for IDE DOMs or CF adapters.
Connector Improvements: Updated holes and dimensions for modern DB23 and RCA connectors.
6. Miscellaneous Fixes:
Delay-line compatibility for both 14-pin and 8-pin SMD versions.
Improved reliability for stacked connectors.
Enhanced power-up reset functionality and dedicated NMI connector.
Sources:
AmiBay sales thread detailing the features and upgrades.
Saft6luck Rev 2.2 upgrade documentation and user discussions.
Maybe
@saft6luck can confirm and/or add something.