I'm quite excited to hereby introduce fist prototype of SIMM RAM 30pin 4MB x 9 with parity. This is 4 layer PCB - if it works -> then redesign to 2 layers
30pin SIMM RAM expansion for the Amiga A500
4MB 30pin SIMM RAM Memory with Parity 4x9 60ns for Apple, Macintosh, Musical Sampler, Old PC, Video Controller at Amazon.com