Dmitry Janushkevich has used this project as the basis for a new design with bigger memory chips, a real-time clock, and on-board bus arbiter. Check it out on Twitter: https://twitter.com/InfoSecDJ/status/1346532012535009282and GitHub: https://github.com/dev-zzo/stebus...
Features:Voltage monitors for 5V, 12V and -12V supply railsLCD interfaceSTEbus arbiterCentronics printer interfaceThese features allow the board to monitor bus health, display it, and record it on a printer. It can reset the system and switch an alarm...
I started this page as a placeholder in 2018, but lacked the time to implement it. In 2021 Benoit told me that he had implemented such a project. Glad to see my evangelical work has encouraged others to adopt STEbus!The project so far is Benoit's...
The MC10 is based on the 6803 and the 6847. The 6803 is a 6800 with extra i/o and instructions. The MC10 firmware uses the extra instructions often. I used a 6811 assembler and made a file that assembles but I have not checked to output against...
The SCPC486 is a single height Eurocard PC AT based on the Intel 486DX4 processor. The bus interface complies with the ANSI/IEEE 1000-1987 standard for STEbus. It provides the following advanced features:Full PC AT compatible core. 486DX4-100...
Eventually PC ISA cards had chips that had COM1, COM2, LPT1, integrated with game ports, floppy disk and hard disk controllers. The floppy drive interface had DMA signals that could not be adapted to the STEBus interface, and were carried to the SCPC88...
One of the first boards, it aimed to provide a full CP/M development system. It was found that customers would develop programs on bigger machines, and wanted very simple Z80 boards for putting into control systems. I'm not sure where I want to go with...
The SG84 is a fast, high resolution colour graphics board. It contains an advanced display controller and a powerful graphics-optimised processor in a single chip, the Hitachi 63484 ACRTC. The graphics processor uses hardware and microcode to perform...
Introduction In 1986, my first boss said "Designing your own computer is a mug's game. You spend ages designing it, even longer debugging it, and end up with a computer nobody else has. So then you have to write your own software, and that takes...
The Zilog ZS180 seems to be the last member of the 64180 family in active production. For 33MHz clock max:3 clocks per memory cycle = 11 MHz cycle rate. 3 clocks per instruction = 11 MHz instruction rate (one opcode). 6 clocks per...
The circuit shows how simple it is. Technology has progressed so much that one can easily fit a megabyte of RAM on a processor board for less than the cost of a DIN41612 connector. Graphics cards are memory mapped, but these days most people have a PC...
At first sight, parallel digital I/O seems simple and straightforward. You make a board with 40 lines of I/O and cable it to a 40-channel signal conditioning board. Some people needed more, and that doubles the boards and cabling. One can try making...
Any fool can invent a bus, and many have. It isn't as simple as most people think, because as wires get longer they start behaving like transmission lines. Signals take time to travel, and bounce back from the end of wires. Wires act like antennae,...
The PD32, was published in Micro Cornucopia number 32, (October/November 1986), page 6. Supports the 32016. Has 512k bytes of DRAM modules. It is a complete processor board. It has no bus interface. It communicates through an 8-bit bus, but not...