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Data bus:

8-bit ISA

Size:

Half-length, full-height card

Hard drive supported:

None

Floppy drives supported:

Two Bernoulli Box drives

CONNECTIONS

Function

Location

34-pin Bernoulli Box connector - external drive

CN1

50-pin Bernoulli Box connector - internal drive

CN2

USER CONFIGURABLE SETTINGS

Function

Location

Setting

DMA channel 3 select

SW3

off

DMA channel 1 select

SW3

on

DMA enabled

SW4

off

PIO (Programmed Input/Ouput) enabled

SW4

on

IRQ5 select

SW6

off

IRQ7 select

SW6

on

Factory configured - do not alter

SW7

off

Two 10MB Bernoulli drives in system

SW8

off

One 10MB Bernoulli drive in system

SW8

on

PORT ADDRESS SELECTION

Address

SW1

SW2

SW5

340h

on

on

off

348h

on

on

on

350h

off

on

off

358h

off

on

on

360h

on

off

off

368h

on

off

on

370h

off

off

off

Disabled

off

off

off

ROM ADDRESS SELECTION (PC2B/50 ONLY)

Address

JP1

JP2

JP3

JP4

C800:0000h - C800:1FFFh

1 & 2

1 & 2

1 & 2

1 & 2

CA00:0000h - CA00:1FFFh

1 & 2

1 & 2

1 & 2

2 & 3

CE00:0000h - CE00-1FFFh

1 & 2

1 & 2

2 & 3

2 & 3

D000:0000h - D000:1FFFh

1 & 2

2 & 3

1 & 2

1 & 2

D200:0000h - D200:1FFFh

1 & 2

2 & 3

1 & 2

2 & 3

D400:0000h - D400:1FFFh

1 & 2

2 & 3

2 & 3

1 & 2

D600:0000h - D600:1FFFh

1 & 2

2 & 3

2 & 3

2 & 3

D800:0000h - D800:1FFFh

2 & 3

1 & 2

1 & 2

1 & 2

DA00:0000h - DA00:1FFFh

2 & 3

1 & 2

1 & 2

2 & 3

DC00:0000h - DC00:1FFFh

2 & 3

1 & 2

2 & 3

1 & 2

DE00:0000h - DE00:1FFFh

2 & 3

1 & 2

2 & 3

2 & 3

E000:0000h - E000:1FFFh

2 & 3

2 & 3

1 & 2

1 & 2

E200:0000h - E200:1FFFh

2 & 3

2 & 3

1 & 2

2 & 3

E400:0000h - E400:1FFFh

2 & 3

2 & 3

2 & 3

1 & 2

RAM/ROM disabled

2 & 3

2 & 3

2 & 3

2 & 3

Note: Designated pins should be in the closed position.

MISCELLANEOUS TECHNICAL NOTES

Model PC2/50 is the same as PC2B/50 with the exception of jumper shunts, and RAM and ROM chips. PC2/50 can be upgraded to PC2B/50 by ordering an upgrade kit that includes shunts and chips.