This neat microcomputer was made for training, education and schooling. It was published in Germany by the "Berufsfortbildungszenter Essen" ("Professional training center Essen") around 1984. It's powered by an Intel 8085 processor at 2MHz clock speed and is modular in many ways. This computer really helps understanding how microcomputers work and is a great tool to learn assembly. Together with its monitor program expansion you can even use a BASIC interpreter, or with a different BIOS and a floppy disk controller board run DOS or CP/M.
Because the Computer was almost only used in Germany, most of the documents and images are written/labeled in German.
A typical workplace of the MFA computer can be seen in the first picture, followed by my system in the second picture:
This table shows all the modules I own, but there are many more available than theese:
Many more manuals can be found on oldcomputers-ddns.org, many thanks to fritzeflink who put all the effort in scanning and editing the documents and files.
This 8085 computer uses 64-Pin DIN 41612 connectors which have the following pin assignment:
The memory map is rather simple, the "MAT85" monitor program is placed at 0000H-1FFFH and only needs RAM at F800H-FFFFH. If the service pack "SP1" is also installed, you have to install additional RAM after 6000H to use BASIC, and RAM after E000H to use the SPS program.
On startup the system boots into MAT85 and lists all available commands. You can either hit the first letter to run that command or hit "Space" and enter the SP1. By hitting "H", the computer will list all commands available in the SP1. For example, by hitting "B" you enter the BASIC interpreter. If a program is beeing executed, you can hit the reset switch on the "PROZESSOR 8085"-module to get back to the command-line. No data will be lost if you reset the CPU.
This page was last modified 03/03/2022 00:24:47.