CBM Pet 2001 Questions
03-Dec-89 19:51:31
Sb: #77253-CBM Pet 2001 Questions
Fm: Bill Eastburn 70007,1657
To: JAMES D. WILLIAMS 72157,3524
PET User port:
1 Ground
2 TV video
3 IEEE-SRQ
4 IEEE-EOI
5 Diagnostic Sense
6 Tape #2 Read
7 Tape Write
8 Tape #1 Read
9 TV Vertical
10 TV Horizontal
11,12 Ground
A Ground
B CA1
C PA0
D PA1
E PA2
F PA3
H PA4
J PA5
K PA6
L PA7
M CB2
N Ground
PAx are periperal I/O lines. CA1 is standard edge sensitive input of
6522VIA. CB2 is Speicial I/O pin of VIA. That what you needed?