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Archive for Category : CP/M

Clock generation in FPGA with phase accumulator. Calculation and limits.

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Published on: 13/04/2013

In my project of a modern replica of a retro computer “Agat-7” I needed to generate several different clocks. Some of them can be produced by the PLL built in FPGA, others are a simple division of the main clock. But there is another group of clock signals that are [...]

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 [...]

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 [...]

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