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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

SM4 https://th99.infania.net/c/A-B/20805.htm

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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

SM4 https://th99.infania.net/c/A-B/20805.htm

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  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.

SM4 https://th99.infania.net/c/A-B/20805.htm

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