ACTION DESK 4000+ Motherboard Settings and Configuration

Processor	80486SX/80486DX/80486DX2/P24T
Processor Speed	25/33/50(internal)/50/66(internal)MHz
Chip Set	Unidentified
Video Chip Set	Cirrus Logic
Maximum Onboard Memory	64MB
Maximum Video Memory	2MB
Cache	64/128/256KB
BIOS	Phoenix
Dimensions	254mm x 218mm
I/O Options	Floppy drive interface, IDE interface, game interface, riser slot
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
Floppy drive interface	CN1	Turbo switch	J22
Game interface	CN2	Riser slot	SL1
IDE interface	CN7

USER CONFIGURABLE SETTINGS
Function		Label	Position
»	Factory configured – do not alter	CN8	Unidentified
»	Parallel port LPT select LPT1	J5	Pins 1 & 2 closed
	Parallel port LPT select LPT2	J5	Pins 2 & 3 closed
»	Serial port 1 COM select COM1	J6	Pins 1 & 2 closed
	Serial port 1 COM select COM3	J6	Pins 2 & 3 closed
»	Serial port 2 COM select COM2	J7	Pins 1 & 2 closed
	Serial port 2 COM select COM4	J7	Pins 2 & 3 closed
»	Floppy drive interface enabled	J8	Pins 1 & 2 closed
	Floppy drive interface disabled	J8	Pins 2 & 3 closed
»	VGA IRQ9 disabled	J14	Open
	VGA IRQ9 enabled	J14	Closed
»	Fast speed enabled	J22	Open
	8 Mhz enabled	J22	Closed
»	Battery type select internal	J34	Pins 2 & 3 closed
	CMOS memory clear	J34	Pins 3 & 4 closed
»	IDE interface enabled	J35	Pins 1 & 2 closed
	IDE interface disabled	J35	Pins 2 & 3 closed

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(1) 256K x 36	None
2MB	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	None
5MB	(1) 1M x 36	(1) 256K x 36
6MB	(1) 1M x 36	(1) 512K x 36
8MB	(1) 1M x 36	(1) 1M x 36
8MB	(1) 2M x 36	None
9MB	(1) 2M x 36	(1) 256K x 36
10MB	(1) 2M x 36	(1) 512K x 36
12MB	(1) 1M x 36	(1) 2M x 36
16MB	(1) 2M x 36	(1) 2M x 36
16MB	(1) 4M x 36	None
17MB	(1) 4M x 36	(1) 256K x 36
18MB	(1) 4M x 36	(1) 512K x 36
20MB	(1) 4M x 36	(1) 1M x 36
24MB	(1) 4M x 36	(1) 2M x 36
32MB	(1) 4M x 36	(1) 4M x 36
32MB	(1) 8M x 36	None
33MB	(1) 8M x 36	(1) 256K x 36
34MB	(1) 8M x 36	(1) 512K x 36

DRAM CONFIGURATION (CON’T)
Size	Bank 0	Bank 1
36MB	(1) 8M x 36	(1) 1M x 36
40MB	(1) 8M x 36	(1) 2M x 36
48MB	(1) 8M x 36	(1) 4M x 36
64MB	(1) 8M x 36	(1) 8M x 36
Note: Board also accepts x 32 SIMMs.

CACHE CONFIGURATION
Size	Bank 0	Bank 1	TAG
64KB	(4) 8K x 8	(4) 8K x 8	Unidentified
128KB	(4) 32K x 8	None	Unidentified
256KB	(4) 32K x 8	(4) 32K x 8	Unidentified
Note: The location of banks 0 & 1 and the TAG are unidentified.

CACHE JUMPER CONFIGURATION
Size	J25	J26	J27	J28
64KB	Pins 1 & 2 closed	Pins 1 & 2 closed	Open	Pins 2 & 3 closed
128KB	Pins 2 & 3 closed	Pins 1 & 2 closed	Pins 1 & 2 closed	Pins 1 & 2 closed
256KB	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed	Pins 2 & 3 closed

VIDEO MEMORY CONFIGURATION
Size	Bank 0	Bank 1
1MB	1MB	None
2MB	1MB	(2) 256K x 16
Note: Bank 0 is factory installed and is not configurable.

CPU SPEED SELECTION
Speed	J16
25MHz	Pins 5 & 6 closed
33MHz	Pins 1 & 2 closed
50iMHz	Pins 5 & 6 closed
50MHz	Pins 3 & 4 closed
66iMHz	Pins 1 & 2 closed

CPU TYPE SELECTION
Type	J17	J19
80486SX	Pins 2 & 3 closed	Open
80486DX	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
80486DX2	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed
P24T	Pins 1 & 2, 3 & 4 closed	Pins 1 & 2 closed

ON BOARD VIDEO SELECTION
Setting	J36	J37
Enabled	Closed	Closed
Disabled	Open	Open