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Re: [N8VEM-S100:7633] PIC32 Ascii Terminal




PIC32MX250F128B-I/SP28SPDIP
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On Sep 24, 2015, at 7:00 PM, John Monahan <mon...@vitasoft.org> wrote:

Hi Gary,

Just about to order the blank chips from Mouser. However the PIC32MX250F128 listed here:-

http://www.mouser.com/ProductDetail/Microchip-Technology/PIC32MX250F128B-I-SP/?qs=hort8UWU32oXjSTLDKUD8A%3D%3D

 

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
Sent: Wednesday, September 23, 2015 6:46 PM
To: N8VEM-S100
Subject: [N8VEM-S100:7620] PIC32 Ascii Terminal

 

I had a small batch of PC boards made up for the PIC32 Ascii Terminal from http://geoffg.net/terminal.html

In order to justify a small run of the boards for my use I had 10 PCB's fabricated in China.  I also purchased a PICKIT3 to program up the microcontrollers.

The boards are directly from the Gerber's on Geoff's site, and I've collected up a "mini-kit" of the unique parts:

Bare PCB with silk screening and solder mask
PIC32 (programmed)
27pf Caps x 2
Microchip LDO Voltage Regulator
Mill-Max IC Socket (28 pin)
USB Connector
Keyboard DIN connector
8mhz xtal
82 ohm resistor
Composite Video Connector

Most of the remaining parts are common and likely already in your parts bin. 

I have 4 PC boards and "mini-kits" left if anyone is interested.  $32 including priority mail postage in the USA to basically cover my costs.

- Gary



 

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