Hi, I send you this link previously: PET Keyboard Expansion Project | | | PET Keyboard Expansion Project | | | You'll see at the bottom the 700 keyboard matrix wiring and connector pinouts at the bottom. I hope my diagrams are clear enough. Steve From: didier derny <didier@aida.org> To: cbm-hackers@musoftware.de Sent: Saturday, March 24, 2018 5:00 AM Subject: ps/2 for cbm 700 I'm making a ps2 interface for the cbm 700 but I have very little information on this machine (not seen it since 1984/1985) Apparently there are not connector inside the machine ? only a DB25 connector ? from the schematics on zimmer I made this table: | SIGNAL | PORT | PIN 6525 | PIN DB25 | | ROW0 | PC0 | 25 | 13 | | ROW1 | PC1 | 26 | 19 | | ROW2 | PC2 | 27 | 20 | | ROW3 | PC3 | 28 | 21 | | ROW4 | PC4 | 29 | 23 | | ROW5 | PC5 | 30 | 13 | | | | | | | COL0 | PA0 | 2 | 12 | | COL1 | PA1 | 3 | 11 | | COL2 | PA2 | 4 | 10 | | COL3 | PA3 | 5 | 9 | | COL4 | PA4 | 6 | 8 | | COL5 | PA5 | 7 | 7 | | COL6 | PA6 | 8 | 6 | | COL7 | PA7 | 9 | 5 | | COL8 | PB0 | 10 | 17 | | COL9 | PB1 | 11 | 4 | | COL10 | PB2 | 12 | 16 | | COL11 | PB3 | 13 | 3 | | COL12 | PB4 | 14 | 15 | | COL13 | PB5 | 15 | 2 | | COL14 | PB6 | 16 | 14 | | COL15 | PB7 | 17 | 1 | | | | | | | GND | | | 22 | | GND | | | 23 | | GND | | | 24 | could you confirm if it's correct - not sure row/col are not inverted - not sure the col number are not inverted - not sure the row number are not inverted thanksReceived on 2018-03-24 15:00:02
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