Processor	Alpha
Processor Speed	166/200/233/275MHz
Chip Set	Digital
Max. Onboard DRAM	512MB
Cache	512KB/2MB
BIOS	Aspen
Dimensions	330mm x 218mm
I/O Options	32-bit PCI slots (3), floppy drive interface, SCSI connectors (2), parallel port, PS/2 mouse interface, serial ports (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Remote diagnostics	J4	Internal SCSI interface	J22
Speaker	J11	Reset switch	J24
Serial port 2	J12	External SCSI interface	J29
Floppy drive interface	J13	PS/2 mouse interface	J31
Parallel port	J14	LED	J90
Keylock	J18	LED	J91
Serial port 1	J20	32-bit PCI slots	PC1 - PC3

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Factory configured - do not alter	J3	Open
»	Factory configured - do not alter	J19	Open
»	Factory configured - do not alter	J25/4	Open
»	Factory configured - do not alter	J25/5	Open
»	Factory configured - do not alter	J25/6	Open

DRAM CONFIGURATION
Size	Bank 0	Bank 1
16MB	(4) 1M x 36	NONE
32MB	(4) 1M x 36	(4) 1M x 36
32MB	(4) 2M x 36	NONE
48MB	(4) 2M x 36	(4) 1M x 36
64MB	(4) 2M x 36	(4) 2M x 36
64MB	(4) 4M x 36	NONE
80MB	(4) 4M x 36	(4) 1M x 36
96MB	(4) 4M x 36	(4) 2M x 36
128MB	(4) 4M x 36	(4) 4M x 36
128MB	(4) 8M x 36	NONE
144MB	(4) 8M x 36	(4) 1M x 36
160MB	(4) 8M x 36	(4) 2M x 36
192MB	(4) 8M x 36	(4) 4M x 36
256MB	(4) 8M x 36	(4) 8M x 36
256MB	(4) 16M x 36	NONE
272MB	(4) 16M x 36	(4) 1M x 36
288MB	(4) 16M x 36	(4) 2M x 36
320MB	(4) 16M x 36	(4) 4M x 36
384MB	(4) 16M x 36	(4) 8M x 36
512MB	(4) 16M x 36	(4) 16M x 36

DRAM JUMPER CONFIGURATION
Size	J25/7	J25/8	J25/9	J25/12	J25/13	J25/14
16MB	Closed	Closed	Closed	Open	Closed	Closed
32MB	Open	Closed	Closed	Open	Closed	Closed
32MB	Closed	Closed	Closed	Closed	Open	Closed
48MB	Open	Closed	Closed	Closed	Open	Closed
64MB	Closed	Open	Closed	Closed	Open	Closed
64MB	Closed	Closed	Closed	Open	Open	Closed
80MB	Open	Closed	Closed	Open	Open	Closed
96MB	Closed	Open	Closed	Open	Open	Closed
128MB	Open	Open	Closed	Open	Open	Closed
128MB	Closed	Closed	Closed	Closed	Closed	Open
144MB	Open	Closed	Closed	Closed	Closed	Open
160MB	Closed	Open	Closed	Closed	Closed	Open
192MB	Open	Open	Closed	Closed	Closed	Open

DRAM JUMPER CONFIGURATION
Size	J25/7	J25/8	J25/9	J25/12	J25/13	J25/14
256MB	Closed	Closed	Open	Closed	Closed	Open
256MB	Closed	Closed	Closed	Open	Closed	Open
272MB	Open	Closed	Closed	Open	Closed	Open
288MB	Closed	Open	Closed	Open	Closed	Open
320MB	Open	Open	Closed	Open	Closed	Open
384MB	Closed	Closed	Open	Open	Closed	Open
512MB	Open	Closed	Open	Open	Closed	Open

DRAM SPEED CONFIGURATION
Speed	J25/10	J25/11	J25/15	J25/16
60ns	Closed	Open	Closed	Open
70ns	Open	Closed	Open	Closed
80ns	Closed	Closed	Closed	Closed
Note: J25 (10 & 11) are for Bank 1 and J25 (15 & 16) are for Bank 0.

CACHE JUMPER CONFIGURATION (REV. B BOARD)
Size	J25/1	J25/2	J25/3
None	Open	Closed	Closed
512KB	Closed	Open	Closed
2MB	Open	Open	Open

CACHE JUMPER CONFIGURATION (REV. D BOARD)
Size	J25/1	J25/2	J25/3
None	N/A	Closed	Closed
2MB	N/A	Open	Open

COMANCHE CONFIGURATION (REV. D BOARD)
Size	J25/1	J25/2	J25/3
Comanche fast write enabled	Closed	N/A	N/A
Comanche fast write disabled	N/A	Open	Open

CPU SPEED CONFIGURATION
Speed	J16A	J16B	J16C
166MHz	Open	Open	Closed
200MHz	Closed	Closed	Open
233MHz	Open	Closed	Open
275MHz	Open	Open	Open