README

The GAL_IO_15 files are for socket IC15 on the EVM7000-3 board and define the I/O ports.

The GAL_MEM_33 files are for socket IC33 on the EVM7000-3 board and define the memory ranges.

The monitor REV 1.4 does not support switching RAM pins A14, A15 and A16. The pins for 
BS0 (13), BS1 (14) and RAMA16 (23) are grounded for the EVM7000-3 board. To keep the board
compatible with monitor REV 1.4, the RAM A15 line should be shorted to ground.

The original Eagle schematic uses a GAL20V8 for IC33, but the files are for a GAL22V10. This
GAL is upward pin-compatible with the 20V8.

fjkraan@electrickery.nl, 2026-10-20
 

