/pub/cbm/schematics/computers/pet/cash_register/

Schematics for Universal CMOS PET, board 4090055,
and "Magic Board" printer interface

Subdirectories

firmware@
ROMS from this machine
pictures@
Pictures of the Cash Register machine

Files

4090007-01.jpg 2018-04-09 19764685
"Magic Board" Printer Interface PCB, Page 1

4090007-02.jpg 2018-04-09 17737110
"Magic Board" Printer Interface PCB, Page 2

4090007-03.jpg 2018-04-09 12834463
"Magic Board" Printer Interface PCB, Page 3

4090035.jpg 2018-04-09 12378270
"Magic Board" Printer Interface Functional Diagram

4090055-01.jpg 2018-03-15 6628055
CPU & Memory Expansion

4090055-02.jpg 2018-03-15 3911881
IEEE-488

4090055-03.jpg 2018-03-15 4735209
Cassette & Keyboard

4090055-04.jpg 2018-03-15 3946006
ROMS

4090055-05.jpg 2018-03-15 4607233
Main RAM

4090055-06.jpg 2018-03-15 3572986
Master Timing & Voltage Regulator

4090055-07.jpg 2018-03-15 3337976
Display Address MUX

4090055-08.jpg 2018-03-15 4272849
Dot Gen & Even Display RAM

4090055-09.jpg 2018-03-15 3424126
Odd Display RAMs

4090055-10.jpg 2018-03-15 3372657
CRTC & Sync Buffers

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