ISA RAM ROM

CAUTION! UNTESTED – WORK IN PROGRESS – UNDER CONSTRUCTION

V2 Changes

ATF22v10 as a memory address decode

Supports  28 or 32 Pin devices for RAM2 & ROM

RAM 1 512k @00000-7FFFF (32pin only)

28Pin
RAM 2 128k @80000-9FFFF
ROM      64K @F0000-FFFFF (28c256)
ROM    128K @E0000-FFFFF (28c512)

32Pin
RAM 2 128k @80000-9FFFF
Jumper Selectable 
    @A0000-A7FFF
    @A8000-AFFFF
    @B0000-B7FFF
    @B8000-BFFFF
    @C0000-C7FFF
    @C8000-CFFFF
    @D0000-D7FFF
    @D8000-DFFFF
    @E0000-EFFFF

FLASH 64k @F0000-FFFFF
Jumper Selectable 
    @C0000-C7FFF
    @C8000-CFFFF
    @D0000-D7FFF
    @D8000-DFFFF
    @E0000-EFFFF