PeripheralsPeripheral's controllers are built as Units. For example, the "COMM Unit" contains a number of UARTs for RS-232 ports accessible from its rear panel. Different controllers can be housed within the same Unit for convenience. For example, an IDE hard drive could be placed in the COMM Unit in order to save space.
In Heritage/1, all peripherals are memory mapped. This implies that device's registers and buffers occupy a portion of the overall (64 Kwords) addressable space. These memory chips (wired as dual-port memory) and associated circuitry reside in the peripheral's Unit. The address range is manually set by the mean of DIP switches located in the unit in question.
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Homebuilt CPUs WebRing
JavaScript by Qirien Dhaela
Join the ring?
David Brooks, the designer of the Simplex-III homebrew computer, has founded the Homebuilt CPUs Web Ring. To join, drop David a line, mentioning your page's URL. He will then add it to the list.
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Project start date: May 13 of 2009
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