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L50

ACER, INC.

L50

Data bus:

32-bit VL-bus

Size:

Three-quarter length, full-height card

Hard drive supported:

Four IDE(AT) drives

Floppy drives supported:

Two 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB drives

CONNECTIONS

Function

Location

40-pin primary IDE(AT) connector

CN1

40-pin secondary IDE(AT) connector

CN2

34-pin cable connector - floppy drive

CN3

10-pin serial port 1

CN4

10-pin serial port 2

CN5

16-pin game port

CN6

15-pin video port

CN7

25-pin parallel port

CN8

VESA feature connector

CN9

4-pin connector - drive active LED

JP28

VGA CONFIGURATION

Mode

JP4

JP5

Enabled

pins 1 & 2 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

USER CONFIGURABLE SETTINGS

Function

Location

Setting

IRQ9 disabled

JP3/pins 1 & 2

closed

 

IRQ9 enabled

JP3/pins 2 & 3

closed

Primary IDE(AT) interface enabled

JP6/pins 1 & 2

closed

 

Primary IDE(AT) interface disabled

JP6/pins 2 & 3

closed

Floppy drive interface enabled

JP11/pins 1 & 2

closed

 

Floppy drive interface disabled

JP11/pins 2 & 3

closed

Ignores cable select configuration for floppy drives

JP12/pins 1 & 2

closed

 

Checks for cable select configuration

JP12/pins 2 & 3

closed

Game port enabled

JP13/pins 1 & 2

closed

 

Game port disabled

JP13/pins 2 & 3

closed

Parallel port IRQ 7 select

JP18/pins 1 & 2

closed

 

Parallel port IRQ 5 select

JP18/pins 2 & 3

closed

PARALLEL PORT ADDRESS SELECTION

LPT

JP14

JP15

LPT1 (378h)

pins 1 & 2 closed

pins 1 & 2 closed

 

LPT2 (278h)

pins 1 & 2 closed

pins 2 & 3 closed

 

LPT3 (3BCh)

pins 2 & 3 closed

pins 2 & 3 closed

 

Disabled

pins 2 & 3 closed

pins 1 & 2 closed

SERIAL PORT 1 ADDRESS SELECTION

COM

JP21

JP22

COM1 (3F8h)

pins 1 & 2 closed

pins 1 & 2 closed

 

COM2 (2F8h)

pins 1 & 2 closed

pins 2 & 3 closed

 

COM3 (3E8h)

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

SERIAL PORT 2 ADDRESS SELECTION

COM

JP23

JP24

COM2 (2F8h)

pins 1 & 2 closed

pins 1 & 2 closed

 

COM1 (3F8h)

pins 1 & 2 closed

pins 2 & 3 closed

 

COM4 (2E8h)

pins 2 & 3 closed

pins 1 & 2 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

SERIAL PORT 1 INTERRUPT SELECTION

IRQ

JP25/Pins 1 & 2

JP26/Pins 1 & 2

JP27/Pins 1 & 2

IRQ4

closed

open

open

 

IRQ3

open

closed

open

 

IRQ5

open

open

closed

SERIAL PORT 2 INTERRUPT SELECTION

IRQ

JP25/Pins 2 & 3

JP26/Pins 2 & 3

JP27/Pins 2 & 3

IRQ3

open

closed

open

 

IRQ4

closed

open

open

 

IRQ5

open

open

closed

PARALLEL PORT MODE CONFIGURATION

Mode

JP16

JP17

SPP

pins 1 & 2 closed

pins 1 & 2 closed

 

EPP

pins 1 & 2 closed

pins 2 & 3 closed

 

ECP

pins 2 & 3 closed

pins 1 & 2 closed

DMA SELECTION FOR ECP MODE

Channel

JP19

JP20

DMA 3

pins 1 & 2 closed

pins 1 & 2 closed

 

DMA 1

pins 2 & 3 closed

pins 2 & 3 closed

MEMORY ADDRESSING

Linear Address

JP1

JP2

64MB

pins 1 & 2 closed

pins 1 & 2 closed

 

2GB

pins 2 & 3 closed

pins 2 & 3 closed

SECONDARY IDE ADDRESS SELECTION

Address

JP7

JP8

Secondary

pins 1 & 2 closed

pins 1 & 2 closed

 

Primary

pins 1 & 2 closed

pins 2 & 3 closed

 

Disabled

pins 2 & 3 closed

pins 2 & 3 closed

SECONDARY IDE INTERRUPT SELECTION

IRQ

JP9

JP10

15

pins 1 & 2 closed

pins 1, 2 & 3 open

 

10

pins 1, 2 & 3 open

pins 1 & 2 closed

 

12

pins 1, 2 & 3 open

pins 2 & 3 closed

 

14

pins 2 & 3 closed

pins 1, 2 & 3 open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(8) 256K x 4

None

2MB

(8) 256K x 4

(2) 256K x 16