Electronics Fun archive
Category : UT-88

UT-88. Using OS CP/M. Part 2/2.

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Published on: 31/03/2012

In this post we will check some programs for CP/M and learn how to load your own programs on “RAM-disk”. External command POWER is intended to work with files in a RAM and the “RAM-disk”. It allows to view files, edit them, rename or erase them, as well as to view and edit data in[...]

UT-88. Using OS CP/M. Part 1/2.

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Published on: 28/03/2012

Finally we reached the most exciting part – we will launch CP/M operation system on “UT-88″. This system was initially developed in 1975 by Gary Kildall of Digital Research, Inc. for Intel 8080 based computers. “UT-88″ is based on the Soviet analog of this processor (KR580VM80A), so it was possible to adapt it for this[...]

UT-88. MONITOR-F for full configuration

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Published on: 26/03/2012

In the previous post we learned how to launch the computer in full configuration. Lets see how it works and what commands MONITOR-F has. As you remember, Monitor-F can be launched from address F800H using the command 7 F800. MONITOR-F setups stack pointer, initialise some constants and variables in memory and makes keyboard initialisation. After that[...]

UT-88. Running in full configuration.

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Published on: 25/03/2012

I hope you enjoyed to play with minimal configuration of the computer. Now lets see how it can be launched in full configuration. “UT-88″ computer supposed to be build step by step, starting with minimal configuration and then adding additional blocks to extend its functionality. That’s why it is a bit complicated to use. After[...]

UT-88. How to use the minimal configuration with MONITOR-0.

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Published on: 19/03/2012

In the previous post we learned how to launch the computer in the minimal configuration. Now lets see how it works in details. MONITOR-0 which is responsible for the computer work in the minimal configuration is allocated in the ROM in the range 0000H-03FFH. To launch it we just need to reset the computer by “RESET” button (KEY[0][...]

UT-88. Description. Minimal configuration launch

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Published on: 16/03/2012

To build “UT-88″ replica I created an extension board for DE1. I’ve added six 7-segments indicators and 16-keys keypad on it almost like original “UT-88″ in minimal configuration had. The board should be connected to GPIO_1 extention header of DE1 to avoid changes in the project. Just in case, I’ve added tape in/out, buzzer and[...]

Soviet computer UT-88. The history.

Categories: Retro computers, UT-88
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Published on: 14/03/2012

I would like to start my blog with this computer. I’m going to make a replica of this computer using FPGA. But lets start from its history first. UT-88 is a hobbyist 8-bit computer that was build on CPU KR580VM80A which is a Soviet analog of a popular Intel 8080. Schematics and a detailed description[...]

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