This site describes the project to restore my ancient 2650-based computer that I call the "P1".
The 2650 microprocessor is an 8-bit microprocessor from Signetics from the late '70s and early '80s. Several companies sold boards using this processor, including Central Data. I obtained a modified copy of the Central Data board in 1980 or 1981. The board is marked "PHCC-2", and has slight modifications from the original board. Eventually I expanded this board with a printer interface, a 32 KByte RAM card, a floppy controller and two 5 1/4" floppy drives. I used the P1 computer for simple word processing and for programming in assembler, Basic, Pascal and Forth. I also added an interface to a box of electronics to create drum sounds, with a simple notation and program to convert sheet music to sound. It has been sitting in my attic after I bought a IBM PC clone. Recently I decided to restore this old bit of history to its former glory, although some of the hardware and all of its software have been lost.
Current contents on this site:
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