Upgrading an older TDS2020 to Flash Forth

Previous TDS2020 users can enjoy Flash Forth. To use it with TDS2020 boards before revision F, a 220pF capacitor should be soldered across the 28-pin socket on your TDS2020 computer. It suppresses an address-decoding spike that is irrelevant to RAMs, but can cause a problem with Flash-EEPROMs. PCB revision F incorporates the capacitor.

You also need to order a new microprocessor containing Flash Forth, part number H8/532-402.

Picture for illustrative purposes only, alternative makes may be supplied.