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The Worlds First Personal ComputeR |
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Release Date: |
January, 1977, at Consumer Electronics Show in Chicago |
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CPU |
1 Mhz MOS 6502 |
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Original Cost |
$795 which is $4,000 in 2024 dollars |
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RAM Memory |
8 Kb (8192 bytes) |
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Offline Storage |
Cassette Tape Drive built-in, later floppy disk drives |
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O/S / ROM: |
18 Kb with COMMODORE BASIC by Bill Gates and Paul Allen |
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PORTS |
2 Datassette ports, 1 IEEE-488 Parallel Port, Custom User Port |
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Keyboard |
Chicklet (calculator) keys: no other computers had keyboard |
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Display |
9” integrated white monochrome monitor 40 x 25 characters |
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Sound / Game Port |
None (added with home brew modifications via User Port) |
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Reset Button |
None |
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Restoration |
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PET Serial Number Project Mother Board |
Link to entry. Manufacture date late 1978 Voltage Regulator replaced, ROM chips pin soldering |
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System |
Long debugging of hang after 10 min was ROMs problem. |
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Monitor |
Capacitors replaced |
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Datassette |
Cleaned and replaced belt, adjusted height of head. |
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Keyboard |
Used ferrous paint to restore membrane key contact, resoldered wires |
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Modifications/Add Ons |
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ROM / RAM Replacement |
Tynemouth Software board with selective replacement of RAM/ROM up to 32 KB and Basic 1, Basic 2, and Basic 4 |
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Sound / Game Port |
Home brew board with CB2 audio out and joystick port. |
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Music |
Home brew buffered 8-bit audio DAC board + 4 voice S/W |
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Mass Storage |
PETdisk MAX SD and internet device using Atmel ATmega1284 |
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Reset Button |
Added home brew push button that ground /RESET line. |
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PETRock PETpix |
M5Stack M5StickC Plus ESP32 powered spectrum analyzer display Raspberry Pi powered display of video with PETSCII graphics |
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