Commodore Amiga 500 - External Disk Connector

External Disk Connector
Pin
2
3-7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
'1
•
Name
I RDY
•
11
IDKRD
GND
"
•
I MTRXD
ISEL2B
/DRESB
I CHNG
+5
ISIDEB
IWPRO
rrKO
IDKWE
IDKWD
ISTEPB
DIRB
ISEL3B
ISELIB
I INDEX
+ 12
•
10
~ 1
•
•
'I
•
x
~() 19
• •
•
7
IX
•
• •
() )
17
•
•
~
I f> I)
• •
Description
•
1
•
,
1.1
•
Disk Ready -Active Low
Disk Ready Data- Active Low
Ground
Disk Motor
Control-Active Low
Select Drive
2-Active Low
Disk RESET- Active Low
Disk has been
Removed from
Latched Low
5 VDC Supply
Drive-
Select Di sk Side--O = Upper I = Lower
Disk
is Write Protec ted-Active Low
Drive Head
Po sition over Track O-Active
Low
Disk Write
Enable-Active Low
Disk Write Data- Active Low
Step the Head-
Pul se, First Low then Hi gh
Select Head Direction--O
= Inner I = Outer
Select Drive
3-Active Low
Select Drive
I-Active Low
Di sk Index Pul se-Ac tive Low
12 VDC Supply
Technical Reference A- 9