IPTools!

ESA-MB
GMX, INC.

ESA-MB

Processor	80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed	33/66(internal)MHz
Chip Set	National/INTEL
Max. Onboard DRAM	256MB
SRAM Cache	64/128 (optional on CPU card only)
BIOS	AMI (located on CPU card)
Dimensions	307.34mm x 330.20mm
I/O Options	Floppy drive interface, IDE interface, parallel port, proprietary CPU card, serial port (2)
NPU Options	None

CONNECTIONS
Purpose	Location	Purpose	Location
8-bit ISA slot	J9	Serial port (COM2)	P7
Proprietary CPU card	J10	Speaker	P10
Keyboard interface	P1	Turbo Switch	P11
Floppy drive interface	P2	Power LED & keylock	P12
IDE interface	P3	IDE interface LED	P13
Auxiliary power connector	P4	Reset switch	P14
Parallel port	P5	Lockable reset switch	P15
Serial port (COM1)	P6

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
�	IDE interface select IORDY at pin 21	JA-2	pins 2 & 4 closed
	IDE interface select IORDY at pin 27	JA-2	pins 4 & 6 closed
�	Watchdog strobe select 1.8MHz clock	JA-4	pins 5 & 6 closed
	Watchdog strobe select host address strobe	JA-4	pins 3 & 4 closed
	Watchdog strobe select signal watchdog	JA-4	pins 1 & 2 closed
�	IDE interface address latch enabled at IDE pin 28	JA-5	Closed
	IDE interface address select spindle sync at IDE pin 28	JA-5	Open
�	ISA bus select 0 wait state	JA-7	pins 1 & 3 open
	ISA bus select 1 wait state	JA-7	pins 1 & 3 closed
�	Posted memory write cycles enabled	JA-7	pins 2 & 4 closed
	Posted memory write cycles disabled	JA-7	pins 2 & 4 open
�	Factory configured - do not alter	JA-8 & JA-9	N/A
�	Keyboard buffer full interrupts from keyboard controller	JA-10	pins 2 & 3 closed
	Keyboard buffer full interrupts from 82351 at IRQ1	JA-10	pins 1 & 2 closed
�	Address enable active on slot 0 & slot 8 (J9)	JA-11	pins 1 & 2 closed
	Address enable active on slot 8 (J9) only	JA-11	pins 1 & 2 open
	. Factory configured - do not alter	JA-12	N/A
�	Factory configured - do not alter	JA-13	N/A
�	Memory speed select speed 1	JA-14	pins 1 & 3 closed
	Memory speed select speed 0	JA-14	pins 2 & 4 closed
�	CMOS memory normal operation	JA-15	pins 2 & 3 closed
	CMOS memory clear	JA-15	pins 1 & 2 closed
	Floppy drive select 2 drives	JA-17	Open
	Floppy drive select 3 drives	JA-17	pins 1 & 2, 3 & 4 closed
�	UART type 16550	JA18	pins 1 & 2 closed
	UART type 16540	JA18	pins 2 & 3 closed
�	IDE interface select National chipset	JA-19	pins 1 & 2 closed
	IDE interface Intel chipset	JA-19	pins 2 & 3 closed
�	Floppy drive select National chipsey	JA--20	pins 1 & 2 closed
	Floppy drive select Intel chipset	JA-20	pins 2 & 3 closed
�	Keylock disabled	JA-21	pins 2 & 3 closed
	Keylock enabled	JA-21	pins 1 & 2 closed
Note:SW1 & SW2 are software dependent.

DRAM CONFIGURATION

Size

Bank0

Bank1

Bank2

Bank3

Bank4

Bank5

Bank6

Bank7

1MB

256K

NONE

2MB

256K

NONE

2MB

512K

NONE

3MB

256K

NONE

4MB

256K

NONE

4MB

512K

NONE

4MB

NONE

5MB

256K

NONE

6MB

256K

NONE

6MB

256K

512K

NONE

6MB

512K

NONE

7MB

256K

NONE

8MB

256K

8MB

256K

512K

NONE

8MB

256K

NONE

8MB

512K

NONE

8MB

NONE

8MB

NONE

9MB

512K

256K

NONE

10MB

512K

256K

NONE

10MB

512K

NONE

11MB

512K

256K

NONE

12MB

512K

256K

12MB

512K

NONE

12MB

512K

NONE

12MB

NONE

14MB

512K

NONE

16MB

512K

16MB

512K

NONE

16MB

512K

NONE

16MB

NONE

16MB

NONE

16MB

NONE

17MB

256K

NONE

18MB

256K

NONE

18MB

512K

NONE

19MB

256K

NONE

20MB

256K

20MB

512K

NONE

20MB

NONE

22MB

512K

NONE

24MB

512K

24MB

NONE

DRAM CONFIGURATION (CONTINUED)

Size

Bank0

Bank1

Bank2

Bank3

Bank4

Bank5

Bank6

Bank7

24MB

NONE

24MB

NONE

28MB

NONE

32MB

NONE

32MB

NONE

32MB

NONE

32MB

NONE

32MB

NONE

33MB

256K

NONE

34MB

256K

NONE

34MB

512K

NONE

35MB

256K

NONE

36MB

256K

36MB

512K

NONE

36MB

NONE

38MB

512K

NONE

40MB

512K

40MB

NONE

40MB

NONE

44MB

NONE

48MB

NONE

48MB

NONE

48MB

NONE

56MB

NONE

64MB

NONE

64MB

NONE

64MB

NONE

64MB

NONE

65MB

256K

NONE

66MB

256K

NONE

66MB

512K

NONE

67MB

256K

NONE

68MB

256K

68MB

512K

NONE

68MB

NONE

70MB

512K

NONE

72MB

512K

72MB

NONE

72MB

NONE

DRAM CONFIGURATION (CONTINUED)
Size	Bank0	Bank1	Bank2	Bank3	Bank4	Bank5	Bank6	Bank7
80MB	4M	4M	4M	4M	2M	2M	NONE	NONE
80MB	4M	4M	4M	4M	4M	NONE	NONE	NONE
88MB	4M	4M	4M	4M	2M	2M	2M	NONE
96MB	4M	4M	4M	4M	4M	4M	NONE	NONE
96MB	4M	4M	4M	4M	8M	NONE	NONE	NONE
96MB	4M	4M	4M	4M	2M	2M	2M	2M
96MB	8M	8M	8M	NONE	NONE	NONE	NONE	NONE
128MB	8M	8M	8M	8M	NONE	NONE	NONE	NONE
128MB	4M	4M	4M	4M	8M	8M	NONE	NONE
129MB	8M	8M	8M	8M	256K	NONE	NONE	NONE
130MB	8M	8M	8M	8M	256K	256K	NONE	NONE
130MB	8M	8M	8M	8M	512K	NONE	NONE	NONE
131MB	8M	8M	8M	8M	256K	256K	256K	NONE
132MB	8M	8M	8M	8M	256K	256K	256K	256K
132MB	8M	8M	8M	8M	512K	512K	NONE	NONE
132MB	8M	8M	8M	8M	1M	NONE	NONE	NONE
134MB	8M	8M	8M	8M	512K	512K	512K	NONE
136MB	8M	8M	8M	8M	512K	512K	512K	512K
136MB	8M	8M	8M	8M	1M	1M	NONE	NONE
136MB	8M	8M	8M	8M	2M	NONE	NONE	NONE
140MB	8M	8M	8M	8M	1M	1M	1M	NONE
144MB	8M	8M	8M	8M	1M	1M	1M	1M
144MB	8M	8M	8M	8M	2M	2M	NONE	NONE
144MB	8M	8M	8M	8M	4M	NONE	NONE	NONE
152MB	8M	8M	8M	8M	2M	2M	2M	NONE
160MB	8M	8M	8M	8M	2M	2M	2M	2M
160MB	8M	8M	8M	8M	4M	4M	NONE	NONE
160MB	8M	8M	8M	8M	8M	NONE	NONE	NONE
176MB	8M	8M	8M	8M	4M	4M	4M	NONE
192MB	8M	8M	8M	8M	4M	4M	4M	4M
192MB	8M	8M	8M	8M	8M	8M	NONE	NONE
224MB	8M	8M	8M	8M	8M	8M	8M	NONE
256MB	8M	8M	8M	8M	8M	8M	8M	8M
Note: The 512K x 36, 2M x 36, and 8M x 36 SIMMs are double-sided SIMMs.

FLOPPY DRIVE 0 CONFIGURATION
A:	JA-1/pins 2 & 4
3.5"	Closed
5.25"	Open

FLOPPY DRIVE 1 CONFIGURATION
B:	JA-1/pins 1 & 3
3.5"	Closed
5.25"	Open

FLOPPY DRIVE POWER CONFIGURATION
Drive Type	RP3
Normal 3.5"	150 W
Low power 3.5"	1K W

IDE INTERFACE I/O READY SIGNAL CONFIGURATION
IORDY	JA-2/pins 2, 4, & 6
At pin 21 of IDE interface	pins 2 & 4 closed
At pin 27 of IDE interface	pins 4 & 6 closed
Note:If the hard drive has the IORDY signal at at both pins then either configuration will work.

IDE INTERFACE DMA CONFIGURATION
DMA	JA-2/pins 1 & 2	JA-2/pins 3 & 5	JA-6 & JA-16
DMA6	Closed	Closed	pins 1 & 2 closed
Disabled	Open	Open	pins 2 & 3 closed
Note:If the drive supports DMA then the IORDY signal must be at pin 27 of the IDE interface.

WATCHDOG TIMER CONFIGURATION
Timeout Minimum	Timeout Typical	Timeout Maximum	JA-3
50ms	150ms	250ms	pins 1 & 2 closed
250ms	600ms	1000ms	Open
400ms	1200ms	2000ms	pins 2 & 3 closed

CONNECTIONS
Purpose	Location
CPU cooling fan power +12VDC	P1
Optional secondary cache module (64K or 128K)	U7
Note:All DRAM banks must be populated on the motherboard before any cache modules can be installed.

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
�	Flash memory normal operation at address A16	JA-1	pins 2 & 3 closed
	Flash memory inverted operation at address A16	JA-1	pins 1 & 2 open
�	Flash BIOS write protect enabled	JA-2	pins 1 & 3, 2 & 4 closed
	Flash BIOS write protect disabled	JA-2	pins 1 & 3, 2 & 4 open

CPU TYPE CONFIGURATION
Type	Speed	JA-3	JA-4
80486SX	33MHz	pins 1 & 2 closed	pins 2 & 4 closed
80486DX/DX2	33/66i MHz	pins 1 & 2 closed	pins 1 & 2, 3 & 4 closed
ODPR486DX	33MHz	pins 1 & 2 closed	pins 1 & 2, 3 & 4 closed
ODP486DX	33MHz	pins 2 & 3 closed	pins 1 & 2, 3 & 4 closed
Note:ODPR486DX is pin compatible with the 80486DX/80486DX2 processors.