Differences

This shows you the differences between two versions of the page.

--- boards:sbc:mini_mc14500:mini_mc14500 [2021/03/03 09:16] – Revision from 2021-03-03
+++ boards:sbc:mini_mc14500:mini_mc14500 [2026/06/15 12:31] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+/* Imported from Wayback Machine
+   Original URL : https://retrobrewcomputers.org/doku.php?id=boards:sbc:mini_mc14500:mini_mc14500
+   Snapshot date: 2025-11-17
+   Generator    : wayback-archiver
+*/
+====== Mini MC14500 ======
+{{[[lib:plugins:ckgedit:fckeditor:userfiles:image:boards:sbc:mini_mc14500:mini_mc14500.jpg]]
+===== Introduction =====
+The Mini MC14500 SBC is a very simple board built around the Motorola MC14500B ICU (Industrial Control Unit) https://en.wikipedia.org/wiki/Motorola_MC14500B. The impetus for this board was an article on the VASTOR processor that was built at the University of Toronto. The following article explains that processor http://www.dissonance.com/archive/journals/Loucks82.pdf. This board is not a VASTOR processor but a single ICU proof of concept based on reference design from Motorola.
+All Data, Instruction and Clock entry is done via switches.
+The Mini MC14500 board has the following features
+LED's for state output
+Switches for programming and data input
+Expansion header to allow direct connection to say a parallel port for control by another CPU.
+The silk screen for the board has all of the OP codes for quick reference
+===== Hardware Documentation =====
+Board: [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:mini_mc14500_board_layout.pdf|mini mc14500 Board Layout]]
+Schematic: [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:mini_mc14500_schematic.pdf|mini mc14500 Schematic]]
+KiCAD and Manufacturing Files: [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:minimc14500_-_kicad.zip|mimi mc14500 KiCAD and Manuf]]
+===== Build Information =====
+BOM: [[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:minimc14500_bom.xls|Mini MC14500 BOM]]
+**Test Programs**
+To run the test programs you need to undertake the following as the precursor
+Data: 1
+Control: IEN (1010)
+Clock
+Control: OEN (1011)
+//**Logical AND example**//
+Data: 1
+Control: IEN (1010)
+Clock
+Control: OEN (1011)
+Clock
+LD (0001)
+Clock
+AND (0011)
+Clock
+STO (1000)
+Clock
+===== Builder's Notes/Comments =====
+Note the currently manufactured board has a single erata that requires the cutting of one track and soldering of one wire between 2 points. The build files have not been updated.
+The build is very simple. Install
+Resistors and capacitors
+Transistors and IC sockets
+LED's
+Switches
+Undertake the required modification as per the erata photo
+===== Photo Gallery =====
+[[https://youtu.be/GkPj3lOSu30|Demonstration Video]]
+Bare board
+{{[[lib:plugins:ckgedit:fckeditor:userfiles:image:boards:sbc:mini_mc14500:img_8359.jpg]]
+Erata Photo - Rear cut and wire jump
+{{[[lib:plugins:ckgedit:fckeditor:userfiles:image:boards:sbc:mini_mc14500:img_8367.jpg]]
+===== File List =====
+Filename
+Filesize
+Last modified
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:img_8359.jpg|img_8359.jpg]]
+.8 MiB
+/01/16 20:14
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:img_8362.jpg|img_8362.jpg]]
+.9 MiB
+/01/16 20:14
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:img_8367.jpg|img_8367.jpg]]
+.9 MiB
+/01/16 20:15
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:mini_mc14500.jpg|mini_mc14500.jpg]]
+.4 KiB
+/01/16 20:23
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:mini_mc14500_board_layout.pdf|mini_mc14500_board_layout.pdf]]
+.9 KiB
+/01/16 19:54
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:mini_mc14500_schematic.pdf|mini_mc14500_schematic.pdf]]
+.9 KiB
+/01/16 19:41
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:minimc14500_-_kicad.zip|minimc14500_-_kicad.zip]]
+.2 KiB
+/01/16 19:46
+[[https://retrobrewcomputers.org/lib/exe/fetch.php?media=boards:sbc:mini_mc14500:minimc14500_bom.xls|minimc14500_bom.xls]]
+.0 KiB
+/01/16 20:36