Ed
The connector is part of the machine and the memory card uses PCB edge as connector.
There is a raiser inserted in onto the 3852A processor board like the one below.
The memory card interfaces this raiser.
I was thinking of making a card using? SRAM .? The 4Mbit chips? R1LP0408DSP-5SI (512kx8) would be a good choice.? 2 chips for 1MB card.
Some things I am not sure of are:
- how the? addressing works on these systems
- how the detection of RAM is determined? by the CPU
- how DTACK signal is generated
- what address range should be used (HP had dip switched)
- how address decoding would be done with dip switches for picking range
Maciej
