ps/2 for cbm 700

From: didier derny <didier_at_aida.org>
Date: Sat, 24 Mar 2018 10:00:13 +0100
Message-ID: <90879444-20f4-4e0a-d903-11ddba9b87c2@aida.org>
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

thanks
Received on 2018-03-24 11:00:03

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