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CMPD4800AIO EISA VESA ZIF

ACER, INC.

CMPD4800AIO EISA VESA ZIF

Processor

80486DX/80486DX2

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

OPTI

Video Chip Set

None

Maximum Onboard Memory

Unidentified

Maximum Video Memory

None

Cache

64/128/256/512/1024KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

P4

Reset switch

P9

Serial port 2

P5

IDE interface LED

P10

Parallel port

P6

Speaker

P11

IDE interface

P7

Power LED & keylock

P12

Floppy drive interface

P8

32-bit VESA local bus slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

IDE I/O channel RDY signal select none

J1

Open

 

IDE I/O channel RDY signal select drive

J1

Closed

»

Flash BIOS programming disabled

J2

Open

 

Flash BIOS programming enabled

J2

Closed

»

Factory configured - do not alter

J3

Unidentified

»

Factory configured - do not alter

J4

Unidentified

»

ISA BUS ready timing ISA RDY

J26

Open

 

ISA BUS ready timing EISA RDY

J26

Closed

»

READY RTN generation select local bus

J28

Pins 1 & 2 closed

 

READY RTN generation select system

J28

Pins 2 & 3 closed

»

VL BUS not delayed

J29

Closed

 

VL BUS delayed

J29

Open

»

Monitor type select color

J31

Closed

 

Monitor type select monochrome

J31

Open

DRAM CONFIGURATION

Note: The maximum amount of memory is unidentified.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U61)

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 64K x 1

Unidentified

128KB

(4) 32K x 8

None

(1) 64K x 1

Unidentified

256KB

(4) 32K x 8

(4) 32K x 8

(1) 64K x 1

Unidentified

512KB

(4) 64K x 8

(4) 64K x 8

(1) 64K x 1

Unidentified

1MB

(4) 128K x 8

(4) 128K x 8

(1) 64K x 1

Unidentified

Note: The location of banks 0 & 1 is unidentified.

CACHE JUMPER CONFIGURATION

Size

J19

J20

J21

J22

J23

64KB

Open

Open

Open

Open

Open

128KB

Open

Closed

Open

Open

Open

256KB

Closed

Closed

Open

Open

Open

512KB

Closed

Closed

Closed

Open

Closed

1MB

Closed

Closed

Closed

Closed

Closed

CACHE JUMPER CONFIGURATION(CON’T)

Size

J24

J25

J27

J30

64KB

Open

Open

Pins 2 & 3 closed

Pins 2 & 3 closed

128KB

Open

Closed

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Closed

Closed

Pins 2 & 3 closed

Pins 2 & 3 closed

512KB

Closed

Closed

Pins 1 & 2 closed

Pins 1 & 2 closed

1MB

Closed

Closed

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU SPEED SELECTION

Speed

J11

J12

J13

J15

J16

J17

J18

25MHz

2 & 3

Open

Open

Closed

Open

Open

Closed

33MHz

2 & 3

Closed

Open

Closed

Open

Open

Open

40MHz

2 & 3

Open

Closed

Open

Open

Open

Closed

50iMHz

2 & 3

Open

Open

Closed

Open

Open

Closed

50MHz

1 & 2

Closed

Closed

Closed

Open

Open

Closed

66iMHz

2 & 3

Closed

Open

Closed

Open

Open

Open

Note: Pins designated should be in the closed position.

DMA CHANNEL SELECTION

Channel

J5

J6

J7

J8

J9

J10

5

Open

Open

Closed

Closed

Open

Open

6

Open

Closed

Open

Open

Closed

Open

7

Closed

Open

Open

Open

Open

Closed

VL BUS WAIT STATE SELECTION

Setting

J14

»

0

Open

 

1

Closed