Commodore Amiga A500 Technical Reference Manual page 10

As
you will notice, the A500 and 2000 deletes clocks and interrupt
lines from the A1 000. The
+
l -
5Vdc and reset lines are also de-
leted. The
+
1
-
12Vdc lines are identical to a PC1 0120.
The following signals (formerly on the RS232 connector) can
be
found
on other connedors:
ResB
=
parallel connector
C2
=
video connector
Centronics Port
The Centronics port also has some non-standard signals. Below is a
table comparing the A1
000
Centronics port with the A500lA2000
Centronics port. Again, this is the opposite sex from the A1 000
and the same sex connector as an IBMB-PC (i.e., a female DB25
connector).
PIN A1 000 ASOO/AZOOO PC1 0
Video Output
DRDY*
Data
0
Data 1
Data 2
Data
3
Data
4
Data 5
Data
6
Data
7
ACK*
BUSY (data)
POUT(clk)
SEL
CND
CND
CND
CND
GND
+
5v
N C
Reset*
STROBE*
Data
0
\
Data 1
j
Data 2
Data
3
k ;
\
\
Data
7
ACK*
k .
BUSY
h
POUT
. SEL
% * A
+
5v pullup
N C
RESET*
GND
GND
GND
GND
GND
STROBE*
Data
0
Data 1
Data 2
Data
3
Data
4
Data 5
Data 6
Data
7
ACK*
BUSY
POUT
SEL
AUTOFDXT*
ERROR*
INIT*
SLCT IN*
GND
GND
GND
GND
The
A500
and A2000, like the A1
000,
use a DB23 video connector.
This 2 3 pin connector contains all the signals necessary to work with
a Genlock, but the current Genlock will need to be redesigned in or-
der to meet the physical requirements of the
A500
and A2000, in-