Commodore Amiga - Forming a Basic Playfield

AMIGA 1000 COMPONENT LEVEL REPAIR
EXTERNAL DISK CONNECTOR
- J7 -
DRESB
PIN LINE
FUNCTION
1
/RDY
Disk Ready — Active Low
2
/DKRD
Disk Ready Data — Active Low
3-7
GND
Ground
8
/MTRXD
Disk Motor Control — Active Low
9
/SEL2B
Select Drive 2 — Active Low
10
/DRESB
Disk RESET — Active Low
11
/CHNG
Disk has been Removed from Drive — Latched Low
12
+ 5
5 VDC Supply
13
/SIDEB
Select Disk Side — 0 = Upper 1 = Lower
14
/WPRO
Disk is Write Protected — Active Low
15
/TKO Drive Head Position over Track 0 — Active Low
16
/DKWE
Disk Write Enable — Active Low
17
/DKWD
Disk Write Data — Active Low
18
/STEPB
Step the Head — Pulse, First Low then High
19 DIRB
Select Head Direction — 0 = Inner 1 = Outer
20
/SEL3B
Select Drive 3 — Active Low
21
/SEL1B
Select Drive 1 — Active Low
22
/INDEX
Disk Index Pulse — Active Low
23 + 12
12 VDC Supply
1-16