| <-- |
TRST |
1 |
U
8271
Disk
Contr
|
40 |
Vcc |
|
| <-- |
SELECT Ø |
2 |
39 |
LOW CURRENT |
|
| --> |
4 MHZ CLOCK |
3 |
38 |
LOAD HEAD |
-- |
| --> |
RESET |
4 |
37 |
DIRECTION |
--> |
| --> |
READY 1 |
5 |
36 |
SEEK/STEP |
--> |
| <-- |
SELECT 1 |
6 |
35 |
WR ENABLE |
--> |
|
| --> |
!DACK |
7 |
34 |
INDEX |
|
| <-- |
DRQ |
8 |
33 |
WR PROTECT |
<-- |
from drive |
| --> |
!RD |
9 |
32 |
READY Ø |
<-- |
| --> |
!WR |
10 |
31 |
TRACK Ø |
<-- |
| <-- |
INT |
11 |
30 |
COUNT UP 1 |
<-- |
| <-> |
DØ |
12 |
29 |
WR DATA |
--> |
| <-> |
D1 |
13 |
28 |
FAULT |
<-- |
| <-> |
D2 |
14 |
27 |
RD DATA |
<-- |
Unseparated Data |
| <-> |
D3 |
15 |
26 |
DATAW |
<-- |
Data Window |
| <-> |
D4 |
16 |
25 |
PLO / SS |
<-- |
| <-> |
D5 |
17 |
24 |
CS |
<-- |
| <-> |
D6 |
18 |
23 |
INSYNC |
|
| <-> |
D7 |
19 |
22 |
A1 |
<-- |
| |
GND |
20 |
21 |
A0 |
<-- |
|
Data Sheet
For full details see "http://bbc.nvg.org/doc/datasheets/8271DataSheet.zip"
Intel Floppy Drive Controller data sheet (Zipped TIF)