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IBM Personal Computer 330 100DX4

From Higher Intellect Vintage Wiki

Description[edit]

The IBM Personal Computer 330 1000DX4 was a IBM compatible PC released sometime around 1994-1995 and based on the intel 80486 microprocessor. It shares parts and general design with the IBM PC 350 100DX4. There were also DX2 versions of this machine as well.

Specifications[edit]

  • CASE: IBM PC-330 LPX Desktop Chassis
  • PSU: 150 Watt IBM Baby-AT
  • MoBo: IBM T/C 6571 Socket 3 Motherboard with SurePath flash BIOS, Socket 3
  • CPU: Intel 80486 DX4-100MHz CPU
  • RAM: 4MB-128MB, compatible with Parity, non-parity, Fast-Page, AND EDO memory
  • FDD: 1.44MB 3.5" Floppy Drive standard
  • HDD: HDD in capacities ranging from 240MB to 2.1GB
  • OPT: CD-ROM drive optional
  • GFX: On-Board Cirrus Logic CL-5429 1MB SVGA w/ Feature connector
  • SND: Internal Speaker, likely IBM MWave sound card was availible as an option
  • NET: Token Ring, Ethernet, or 3270 Emulator Card
  • O/S: MS-DOS/Windows For Workgroups 3.11, OS/2 2.1, or Windows 95 (later)

Technical Details[edit]

The IBM PC-330 and 350 series were often nicknamed the "Select-A-Bus" series because the LPX riser card installed in the system could be either PCI or VESA Local Bus based based on the card installed and a pair of jumpers next to it. It had a 5 chip L2 Cache that could allow for up to 1MB of L2 Cache, and the socket 3 CPU socket could handle 5V and 3.3V CPUs. It was primarily sold as a mid-tier enterprise class machine. It's consumer equivalent would be the early IBM NetVista machines which often used the same components.

Externally, the machines in this series were defined by it's sliding cover that would hide the floppy/cd-rom drives, an IBM Logo that could be turned to put the PC into a "Tower" orientation, and the heavily ridged front bezel. In back there's a white plastic beauty cover that covers the rear of the chassis as well. Typically it shipped with an IBM G-40 monitor, PS/2 mouse, and Model "M" Keyboard.

Jumper Settings[edit]

Processor

80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T

Processor Speed

20/25/33/40/50(internal)/50/66(internal)/75(internal)/ 100(internal)MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

Unidentified

Cache

128/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit VESA/PCI local bus slot, floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2),VESA feature connector, VGA port, riser slot, VRM connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED

CN1

IDE interface 2

J10

IDE interface LED

CN2

VESA feature connector

J14

PS/2 mouse port

J2

Speaker

J27

Serial port 1

J3

On/off switch connector

J29

Serial port 2

J4

On/off switch power supply connector

J30

Parallel port

J5

Riser slot

SL1

VGA port

J6

32-bit VESA/PCI local bus slot

SL2

Floppy drive interface

J7

VRM connector

VRM

IDE interface 1

J9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Flash BIOS write protect disabled

J13

Pins 2 & 3 closed

 

Flash BIOS write protect enabled

J13

Pins 1 & 2 closed

»

On board video enabled

J15

Pins 1 & 2 closed

 

On board video disabled

J15

Pins 2 & 3 closed

»

Factory configured - do not alter

JP2

Unidentified

»

Modem answers on ring

JP5

Pins 2 & 3 closed

 

Modem does not answer on ring

JP5

Pins 1 & 2 closed

»

Factory configured - do not alter

JP11

Unidentified

»

PS/2 mouse enabled

JP12

Closed

 

PS/2 mouse disabled

JP12

Open

»

CMOS memory normal operation

JP14

Pins 1 & 2 closed

 

CMOS memory clear

JP14

Pins 2 & 3 closed

»

VGA IRQ9 enabled

JP15

Closed

 

VGA IRQ9 disabled

JP15

Open

»

Floppy drive write protect disabled

WP

Open

 

Floppy drive write protect enabled

WP

Closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 32

None

None

None

8MB

(1) 1M x 32

(1) 1M x 32

None

None

8MB

(1) 2M x 32

None

None

None

12MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

None

12MB

(1) 1M x 32

(1) 2M x 32

None

None

16MB

(1) 4M x 32

None

None

None

16MB

(1) 1M x 32

(1) 1M x 32

(1) 2M x 32

None

16MB

(1) 2M x 32

(1) 2M x 32

None

None

16MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

20MB

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

None

20MB

(1) 1M x 32

(1) 4M x 32

None

None

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

24MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

None

24MB

(1) 1M x 32

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

24MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

None

28MB

(1) 1M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

28MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

(1) 1M x 32

32MB

(1) 4M x 32

(1) 4M x 32

None

None

32MB

(1) 8M x 32

None

None

None

32MB

(1) 2M x 32

(1) 2M x 32

(1) 4M x 32

None

32MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

36MB

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

None

40MB

(1) 1M x 32

(1) 1M x 32

(1) 8M x 32

None

40MB

(1) 1M x 32

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

48MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

None

48MB

(1) 2M x 32

(1) 2M x 32

(1) 8M x 32

None

48MB

(1) 2M x 32

(1) 2M x 32

(1) 4M x 32

(1) 4M x 32

52MB

(1) 1M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

64MB

(1) 8M x 32

(1) 8M x 32

None

None

64MB

(1) 4M x 32

(1) 4M x 32

(1) 8M x 32

None

64MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

68MB

(1) 1M x 32

(1) 8M x 32

(1) 4M x 32

(1) 4M x 32

72MB

(1) 1M x 32

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

80MB

(1) 2M x 32

(1) 2M x 32

(1) 8M x 32

(1) 8M x 32

84MB

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

96MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

None

96MB

(1) 4M x 32

(1) 4M x 32

(1) 8M x 32

(1) 8M x 32

100MB

(1) 1M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

128MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

Note: Board also accepts x 36 SIMMs.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

None

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

J16

J17

J38

128KB

Pins 2 & 3 closed

Open

Open

256KB

Pins 1 & 2 closed

Closed

Open

CPU SPEED SELECTION

Speed

J35

J36

J37

20MHz

Closed

Open

Open

25MHz

Open

Closed

Closed

33MHz

Open

Closed

Open

40MHz

Open

Open

Closed

50iMHz

Open

Closed

Closed

50MHz

Open

Open

Open

66iMHz

Open

Closed

Open

75iMHz

Open

Closed

Closed

100iMHz

Open

Closed

Open

CPU TYPE SELECTION

Type

J23

J24

80486SX

Pins 1 & 2 closed

Open

486 Overdrive

Pins 2 & 3 closed

Open

80486DX

Pins 2 & 3 closed

Open

80486DX2

Pins 2 & 3 closed

Open

80486DX4

Pins 2 & 3 closed

Open

P24T

Pins 2 & 3 closed

Closed

CPU MULTIPLIER SELECTION (80486DX4 ONLY)

Multiplier

JP10

Other multiplier

Pins 1 & 2 closed

2x

Pins 3 & 4 closed

3x

Open

LOCAL BUS SELECTION ON RISER SLOT

Setting

JP3

JP4

JP7

JP13

VESA local bus

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

Closed

PCI local bus

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

Open

DMA CHANNEL SELECTION

Channel

JP8

JP9

1

Pins 2 & 3 closed

Pins 2 & 3 closed

3

Pins 1 & 2 closed

Pins 1 & 2 closed

See Also[edit]