ASCII (Apple //e, specifically) to USB HID keyboard?

Tony Duell ard at p850ug1.demon.co.uk
Tue Jul 31 15:25:07 CDT 2007


> The Goog isn't being much help with pinouts.  Anybody have a pinout  
> spec for the //e?
Y

I don't even much care for the Apple ][ line, but I did buy the //e 
techref when I saw it...

Here's a pinout for the 26 pin keyboard connector : 

1 : Y0        2 : Y1
3 : +5V       4 : Y2
5 : N/C       6 : Y3
7 : N/C       8 : Y4
9 : N/C       10 : Y5
11 : Ctrl/    12 : Y8
13 : Ground   14 : X0
15 : N/C      16 : X2
17 : X7       18 : X1
19 : X5       20 : X3
21 : X4       22 : Y9
23 : Y6       24 : Shift/
25 : Y7       26 : X6

There is also a keypad connector, which is an 11 pin SIL thing. The 
pinout is : 

1 : Y0
2 : Y1
3 : Y3
4 : Y4
5 : Y2
6 : Y5
7 : N/C
8 : X7
9 : X4
10 : X6
11 : X5


The Xn and Yn lines are the connections to the 2 'sides' of the switch 
matrix. Unfortunately, I can't find anything in the manual which gives a 
diagram of which key occupies each postiion in the matrix, and while, in 
the //e, the keyboard is scanned by a fairly standard encoder chip, the 
outputs of that go into an EPROM which effectively re-maps the keyboard. 
So I can't help you there.

I beleive the shift and control keys are connected between the 
appropriate pins on the connector and ground, so those are easy...

-tony




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