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ML-757

CHAINTECH COMPUTER COMPANY, LTD.

ML-757

Data bus:

32-bit VL-bus

Size:

Three-quarter length, half-height card

Hard drive supported:

Four IDE(AT) drives

Floppy drives supported:

Two 360KB, 720KB, 1.2MB, or 1.44MB drives

CONNECTIONS

Function

Location

40-pin primary IDE(AT) connector

J1

40-pin secondary IDE(AT) connector

J2

34-pin cable connector - floppy drive

J3

10-pin serial port 1 internal, 9-pin serial port 1 - external

J4

10-pin serial port 2 - internal

J5

16-pin game port

J6

25-pin parallel port - external

J7

4-pin connector - drive active LED

J8

PARALLEL PORT ADDRESS SELECTION

LPT

JP13

JP14

LPT1 (378h)

pins 1 & 2 closed

pins 1 & 2 closed

 

LPT2 (278h)

pins 2 & 3 closed

pins 2 & 3 closed

 

LPT3 (3BCh)

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

pins 1 & 2 closed

pins 2 & 3 closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

IDE(AT) interface enabled

JP1/pins 1 & 2

closed

 

IDE(AT) interface disabled

JP1/pins 2 & 3

closed

Primary & secondary IDE enabled

JP2/pins 1 & 2

closed

 

Primary IDE enabled, secondary disabled

JP2/pins 2 & 3

closed

CPU clock is 40 or 50MHz

JP3/pins 1 & 2

closed

 

CPU clock <=33MHz

JP3/pins 2 & 3

closed

Factory configured - do not alter

JP4

N/A

Factory configured - do not alter

JP5

N/A

Floppy drive order is normal (A:, B:)

JP6/pins 1 & 2

closed

 

Floppy drive order is reversed (B:, A:)

JP6/pins 2 & 3

closed

Floppy controller primary address is 3F0h

JP7/pins 1 & 2

closed

 

Floppy controller secondary address is 370h

JP7/pins 2 & 3

closed

Floppy drive interface enabled

JP8/pins 1 & 2

closed

 

Floppy drive interface disabled

JP8/pins 2 & 3

closed

Parallel port is unidirectional

JP15

closed

 

Parallel port is bi-directional

JP15

open

Parallel port IRQ 7 select

JP16/ 1

closed

 

Parallel port IRQ 5 select

JP16/ 2

closed

Game port enabled

JP17

closed

 

Game port disabled

JP17

open

SERIAL PORT 1 ADDRESS SELECTION

COM

JP9

JP10

COM1 (3F8h)

pins 1 & 2 closed

pins 1 & 2 closed

 

COM3 (3E8h)

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

pins 2 & 3 closed

pins 1 & 2 closed

SERIAL PORT 2 ADDRESS SELECTION

COM

JP11

JP12

COM2 (2F8h)

pins 1 & 2 closed

pins 1 & 2 closed

 

COM4 (2E8h)

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

pins 2 & 3 closed

pins 1 & 2 closed

MISCELLANEOUS TECHNICAL NOTES

Pin 1 in jumper blocks is unidentified.