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SM4

AMERICAN MULTISOURCE, INC.

SM4

Data bus:

16-bit ISA

Size:

Three/quarter-length, full-height card

Hard drive supported:

Two MFM ST506/412 drives

Floppy drives supported:

Four 360KB, 720KB, 1.2MB, 1.44MB drives

 

CONNECTIONS

Function

Location

34-pin control cable connector - hard drive

J1

20-pin data cable connector

J2

20-pin data cable connector

J3

34-pin connector - floppy drive interface (drives 1 & 2)

J4

4-pin connector - drive active LED

J5

34-pin connector - floppy drive interface (drives 3 & 4)

J6

34-pin connector - floppy drive interface (drives 3 & 4) - external

J7

USER CONFIGURABLE SETTINGS

Function

Location

Setting

Floppy drive interface address select primary

W8

open

 

Floppy drive interface address select secondary

W8

closed

Hard drive address is primary

W11

open

 

Hard drive address is secondary

W11

closed

HARD DRIVE INTERFACE CONFIGURATION

Setting

W5

W12

Enabled

pins 2 & 3 closed

closed

 

Disabled

pins 1 & 2 closed

open

FLOPPY DRIVE INTERFACE CONFIGURATION

Setting

W9

W10

Enabled

closed

closed

 

Disabled

open

open

Note: The location of W9 is unidentified.