PC2/50, PC2B/50 Hard Disk/Floppy Controller Settings and Configuration

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.