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G8MNY > IBM 23.11.20 09:01l 51 Lines 1205 Bytes #999 (0) @ WW
BID : 13555_GB7CIP
Read: GAST
Subj: Diskette Drive Connector
Path: DB0FFL<OE5XBL<OE5XBR<OE1XAB<HG8LXL<XE1FH<LU3DVN<LU9DCE<EC5W<PE1RRR<
W0ARP<VE2PKT<UA6ADV<I0OJJ<GB7CIP
Sent: 201123/0747Z @:GB7CIP.#32.GBR.EURO #:13555 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : IBM@WW
34 Pin connector Diskette/Fixed Disk
DRV CRD
SIGNAL DESCRIPTION PIN DIRECTION
Ground - Odd Numbers 1-33 -
Reduced Write 2 <
Reserved 4 -
Drive Select 3 6 <
Index 8 >
Drive Select 0 10 <
Drive Select 1 12 <
Drive Select 2 14 <
Motor On 16 <
Direction Select 18 <
Step 20 <
Write Data 22 <
Write Gate 24 <
Track 00 26 >
Write Protect 28 >
Read Data 30 >
Side 1 Select 32 <
Diskette Change 34 >
The d/drive is a Citezen OPDA-12A.
The Atari has a 14 pin socket as follows...
SIGNAL DESCRIPTION PIN
Read data 1
Side 0 select 2
Logic ground 3
Index pulse 4
Drive 0 select 5
Drive 1 select 6
Logic ground 7
Motor on 8
Direction in 9
Step 10
Write data 11
Write gate 12
Track 00 13
Write protect. 14
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
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