The PDIP diagram on the Mouser web page you reference does indeed appear to be a wide package, but it says Images are for reference only. Now click the DataSheet and look at the SPDIP dimensions at the bottom of page 1: 1.365 x 0.285 x 0.135 inches. This is actually a 0.3 inch wide 28 pin package, as we see on the photos on Geoff’s Project page. I’m looking forward to building this and having a backup for my Heathkit H-19 that uses “modern” keyboard and VGA display. Bob Bell From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of John Monahan Hi Gary, Just about to order the blank chips from Mouser. However the PIC32MX250F128 listed here:- seems wider than on the circuit board in Geoff’s article. Do I have the wrong one. Will also order a programmer. I’m try to figure out if I go that route on the SBC-Z80 board what would be the best way to get data to and from the S100 bus itself. If I understand it correctly I would have to have a serial port/chip on the board. Is the “TTL Serial” (pins 5 & 6) compatible with say a 5V Zilog 8530. When you add that as well as buffers etc. the board circuit real estate mounts up. What would be nice if a PIC with a parallel port type pins was programmed/set up to go directly to a local bidirectional board bus as I have with the propeller circuit. BTW, I’m having problems at the moment getting the Propeller circuit to recognize/output characters. There are a number of minor errors on the board. I will outline to you in a day or two still a work in progress! John From: n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] On Behalf Of Gary Kaufman I had a small batch of PC boards made up for the PIC32 Ascii Terminal from http://geoffg.net/terminal.html -- -- |