ECA 33M50 Motherboard Settings and Configuration

EFA CORPORATION

ECA 33M50

Processor
80386DX/80486SX/80486DX
Processor Speed
16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set
UMC
Max. Onboard DRAM
32MB
SRAM Cache
64/128/256KB
BIOS
AMI
Dimensions
330mm x 218mm
I/O Options
None
NPU Options
4167

CONNECTIONS
Purpose
Location
Purpose
Location
Power LED & keylock
J1
Turbo LED
J4
Speaker
J2
Turbo switch
J5
Reset switch
J3
External battery
J17

USER CONFIGURABLE SETTINGS
Function
Jumper
Position
»
Monitor type select monochrome
J16
open

Monitor type select color
J16
closed
»
Factory configured - do not alter
J21
open

BIOS type select 64K
J22
pins 2 & 3 closed

BIOS type select 128K
J22
pins 1 & 2 closed

SRAM CONFIGURATION
Size
Cache SRAM
Location
TAG (U22)
TAG (U24)
64KB
(8) 8K x 8
Banks 0 & 1
(1) 32K x 8
(1) 16K x 4
128KB
(4) 32K x 8
Bank 0
(1) 32K x 8
(1) 16K x 4
256KB
(8) 32K x 8
Banks 0 & 1
(1) 32K x 8
(1) 16K x 4

SRAM JUMPER CONFIGURATION
Size
J7
J8
J9
J10
J11
J12
J13
J14
J15
64KB
2 & 3
2 & 3
open
open
open
open
closed
1 & 2
open
128KB
1 & 2
2 & 3
open
closed
open
closed
closed
2 & 3
1 & 2
256KB
1 & 2
1 & 2
closed
closed
closed
closed
closed
1 & 2
2 & 3
Note:Pins designated should be in the closed position.

DRAM CONFIGURATION
Size
Bank 0
Bank 1
1MB
(4) 256K x 9
NONE
2MB
(4) 256K x 9
(4) 256K x 9
4MB
(4) 1M x 9
NONE
5MB
(4) 1M x 9
(4) 256K x 9
8MB
(4) 1M x 9
(4) 1M x 9
16MB
(4) 4M x 9
NONE
20MB
(4) 4M x 9
(4) 1M x 9
32MB
(4) 4M x 9
(4) 4M x 9

CPU TYPE CONFIGURATION

CPU
S1
switch 1
S1
switch 2
S1
switch 3
S1
switch 4
S2
switch 1-6
Jumper
J23
80486DX2
closed
closed
open
open
open
pins 1 & 2
ODP486SX
closed
closed
open
open
open
pins 2 & 3
80486DX
closed
closed
open
open
open
pins 1 & 2
80487SX-25
closed
closed
open
open
open
pins 2 & 3
80487SX-20
closed
closed
open
closed
open
pins 2 & 3
80486SX-25
open
open
closed
open
open
open
80486SX-20
open
open
closed
closed
open
open
80386DX
closed
closed
open
open
closed
N/A

CPU SPEED CONFIGURATION

CPU
iOSC
SPEED
S3
switch 1
S3
switch 2
S3
switch 3
S3
switch 4
S2
switchs 1-6
80486DX2-50
25MHz
closed
closed
open
closed
open
ODP486SX-66
33MHz
closed
open
closed
closed
open
ODP486SX-50
25MHz
closed
closed
open
closed
open
80486DX-50
50MHz
open
open
open
open
open
80486DX-33
33MHz
closed
open
closed
closed
open
80486DX-25
25MHz
closed
closed
open
closed
open
80487SX-25
25MHz
closed
closed
open
closed
open
80487SX-20
40MHz
open
open
closed
open
open
80486SX-25
25MHz
closed
closed
open
closed
open
80486SX-20
40MHz
open
open
closed
open
open
80386DX-40
80MHz
closed
open
open
open
closed
80386DX-33
66MHz
open
open
open
closed
closed
80386DX-20
20MHz
closed
closed
closed
open
closed
80386DX-16
16MHz
closed
closed
closed
closed
closed

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ECA 33M50 Motherboard Settings and Configuration

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Processor	80386DX/80486SX/80486DX
Processor Speed	16/20/25/33/40/50(internal)/50/66(internal)MHz
Chip Set	UMC
Max. Onboard DRAM	32MB
SRAM Cache	64/128/256KB
BIOS	AMI
Dimensions	330mm x 218mm
I/O Options	None
NPU Options	4167

CONNECTIONS
Purpose	Location	Purpose	Location
Power LED & keylock	J1	Turbo LED	J4
Speaker	J2	Turbo switch	J5
Reset switch	J3	External battery	J17

USER CONFIGURABLE SETTINGS
Function		Jumper	Position
»	Monitor type select monochrome	J16	open
	Monitor type select color	J16	closed
»	Factory configured - do not alter	J21	open
	BIOS type select 64K	J22	pins 2 & 3 closed
	BIOS type select 128K	J22	pins 1 & 2 closed

SRAM CONFIGURATION
Size	Cache SRAM	Location	TAG (U22)	TAG (U24)
64KB	(8) 8K x 8	Banks 0 & 1	(1) 32K x 8	(1) 16K x 4
128KB	(4) 32K x 8	Bank 0	(1) 32K x 8	(1) 16K x 4
256KB	(8) 32K x 8	Banks 0 & 1	(1) 32K x 8	(1) 16K x 4

SRAM JUMPER CONFIGURATION
Size	J7	J8	J9	J10	J11	J12	J13	J14	J15
64KB	2 & 3	2 & 3	open	open	open	open	closed	1 & 2	open
128KB	1 & 2	2 & 3	open	closed	open	closed	closed	2 & 3	1 & 2
256KB	1 & 2	1 & 2	closed	closed	closed	closed	closed	1 & 2	2 & 3
Note:Pins designated should be in the closed position.

DRAM CONFIGURATION
Size	Bank 0	Bank 1
1MB	(4) 256K x 9	NONE
2MB	(4) 256K x 9	(4) 256K x 9
4MB	(4) 1M x 9	NONE
5MB	(4) 1M x 9	(4) 256K x 9
8MB	(4) 1M x 9	(4) 1M x 9
16MB	(4) 4M x 9	NONE
20MB	(4) 4M x 9	(4) 1M x 9
32MB	(4) 4M x 9	(4) 4M x 9

CPU TYPE CONFIGURATION
CPU	S1 switch 1	S1 switch 2	S1 switch 3	S1 switch 4	S2 switch 1-6	Jumper J23
80486DX2	closed	closed	open	open	open	pins 1 & 2
ODP486SX	closed	closed	open	open	open	pins 2 & 3
80486DX	closed	closed	open	open	open	pins 1 & 2
80487SX-25	closed	closed	open	open	open	pins 2 & 3
80487SX-20	closed	closed	open	closed	open	pins 2 & 3
80486SX-25	open	open	closed	open	open	open
80486SX-20	open	open	closed	closed	open	open
80386DX	closed	closed	open	open	closed	N/A

CPU SPEED CONFIGURATION
CPU	iOSC SPEED	S3 switch 1	S3 switch 2	S3 switch 3	S3 switch 4	S2 switchs 1-6
80486DX2-50	25MHz	closed	closed	open	closed	open
ODP486SX-66	33MHz	closed	open	closed	closed	open
ODP486SX-50	25MHz	closed	closed	open	closed	open
80486DX-50	50MHz	open	open	open	open	open
80486DX-33	33MHz	closed	open	closed	closed	open
80486DX-25	25MHz	closed	closed	open	closed	open
80487SX-25	25MHz	closed	closed	open	closed	open
80487SX-20	40MHz	open	open	closed	open	open
80486SX-25	25MHz	closed	closed	open	closed	open
80486SX-20	40MHz	open	open	closed	open	open
80386DX-40	80MHz	closed	open	open	open	closed
80386DX-33	66MHz	open	open	open	closed	closed
80386DX-20	20MHz	closed	closed	closed	open	closed
80386DX-16	16MHz	closed	closed	closed	closed	closed