JC INFORMATION SYSTEMS CORPORATION

MODEL 2020

Processor	80386DX
Processor Speed	25/33MHz
Chip Set	C & T PEAK/DM
Max. Onboard DRAM	32MB
Cache	64KB
BIOS	C & T/Phoenix
Dimensions	330mm x 218mm
I/O Options	32-bit external memory card slot
NPU Options	80387

CONNECTIONS
Purpose	Location	Purpose	Location
External battery	J4	Speaker	SPK
Power LED & keylock	KEYL	Self test	TEST
Reset switch	RSW	Turbo LED	TLED
32-bit external memory card	S1	Turbo switch	TSW

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	W2	open
»	Factory configured - do not alter	W3	pins 1 & 2 closed
»	Factory configured - do not alter	W6	closed
»	Factory configured - do not alter	W9	pins 2 & 3 closed
»	CMOS memory normal operation	W10	pins 2 & 3 closed
	CMOS memory clear	W10	pins 1 & 2 closed
»	Monitor type select color	W11	closed
	Monitor type select monochrome	W11	open
Note:The locations of W2, W3, W6, and W9 are unknown.

DRAM CONFIGURATION
Size	Bank 0	Bank 1	W4
1MB	(4) 256K x 9	NONE	pins 1 & 2 closed
2MB	(4) 256K x 9	(4) 256K x 9	pins 1 & 2 closed
4MB	(4) 1M x 9	NONE	pins 1 & 2 closed
5MB	(4) 1M x 9	(4) 256K x 9	pins 2 & 3 closed
8MB	(4) 1M x 9	(4) 1M x 9	pins 1 & 2 closed
16MB	(4) 4M x 9	NONE	pins 1 & 2 closed
32MB	(4) 4M x 9	(4) 4M x 9	pins 1 & 2 closed

CACHE CONFIGURATION
Size	Cache CACHE	Location	TAG
64KB	(8) 8K x 8	CACHE	(2) 16K x 1

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MODEL 2020, motherboard, processor, socket, pentium, pentium pro, celeron, powerpc, alpha, 8088, 8086, 286, 386, 486, configuration, RAM, DRAM, floppy, jumper, connections