A1200_8MB_FASTRAM

8MB FastRAM expansion for Amiga 1200 (with RTC).

Complete 5V design using Microchip ATF1508 CPLD. Source code based on "Amiga 600 8 megabytes fastRAM board": http://lvd.nedopc.com/Projects/a600_8mb/index.html and some other sources I forgot :)

An aim of this design is to learn Verilog and 68k CPU. So the pcb has a TEST connector for debug and future expansion.

Firmware:

At the moment supports only 8MB configuration.

PCB:

4-layers, gerber files included for production. Designed in Altium Designer.

First working sample (Rev 0). Had to cut a bit as it was not fit to the Amiga trapdoor place.

Revision 2 came as a bug fix:

1. Fixed short circuit between data bus by a via.
2. Corrected pcb outline to fit Amiga without any mechanical modification.
3. Added crystal footprint if the RTC is M6242B

This revision has not yet been tested but DRC issues no errors.

Suitable DRAM list:

(Based on https://github.com/SukkoPera/OpenAmiga500FastRamExpansion)

AS4C1M16E5 Alliance

GM71C18160 Hynix/LGS

HY5118164B Hynix

KM416C1200AJ SEC

KM416C1204AJ/BJ SEC

MSM5118160 OKI

TMS41860DZ Texas Instruments

4218160 NEC

4218165 NEC

VG2618165BJ Vanguard

NN5118160AJ-60 NPN

NN5118165AJ-60 NPN

GM71C18163 LGS

51C16165CJB-6 MDT

TMS418169DZ Texas Instruments

HYB5118160BSJ Siemens