EPx (EISA Desktop) Motherboard Layout

EPx (J3 Motherboard) (Rev 1.3.8)

RAM Configuration

The motherboard comes with either 4 or 8MB. SIMMs used are 72-pin 80ns.

It supports 4MB, 16MB, and 64MB single-density SIMMs, and 8MB, 32MB double-density SIMMs

486 CPU Board

Using Single-Density SIMMs 4MB - 64MB, 64MB - 148MB, 148MB - 256MB, Using Double-Density SIMMs

Pentium CPU Board

Memory Configurations

Using 486 CPU Board

Memory Configurations Using Single-Density SIMMs. (4MB - 64MB)
Bank 0	Bank 1	Bank 2	Bank 3	Total
4MB				4MB
4MB	4MB			8MB
4MB	4MB	4MB		12MB
4MB	4MB	4MB	4MB	16MB

16MB				16MB
4MB	16MB			20MB
4MB	4MB	16MB		24MB
4MB	16MB	4MB		24MB

4MB	4MB	16MB	4MB	28MB
4MB	16MB	4MB	4MB	28MB
16MB	16MB			32MB
4MB	16MB	16MB		36MB

16MB	16MB	4MB		36MB
4MB	4MB	16MB	16MB	40MB
4MB	16MB	16MB	4MB	40MB
16MB	16MB	4MB	4MB	40MB

16MB	16MB	16MB		48MB
4MB	16MB	16MB	16MB	52MB
16MB	16MB	16MB	4MB	52MB
16MB	16MB	16MB	16MB	64MB

Using 486 CPU Board

Memory Configurations Using Single-Density SIMMs. (64MB - 148MB)
Bank 0	Bank 1	Bank 2	Bank 3	Total

64MB				64MB
4MB	4MB	64MB		72MB
16MB	64MB			80MB
4MB	16MB	64MB		84MB

16MB	64MB	4MB		84MB
4MB	4MB	16MB	64MB	88MB
16MB	64MB	4MB	4MB	88MB
16MB	16MB	64MB		96MB

16MB	64MB	16MB		96MB
4MB	16MB	16MB	64MB	100MB
16MB	64MB	16MB	4MB	100MB
16MB	16MB	16MB	64MB	112MB

16MB	64MB	16MB	16MB	112MB
64MB	64MB			128MB
64MB	64MB	4MB		132MB
4MB	4MB	64MB	64MB	136MB

64MB	64MB	4MB	4MB	136MB
16MB	64MB	64MB		144MB
64MB	64MB	16MB		144MB
4MB	16MB	64MB	64MB	148MB

Using 486 CPU Board

Memory Configurations Using Single-Density SIMMs. (148MB - 256MB)
Bank 0	Bank 1	Bank 2	Bank 3	Total
64MB	64MB	16MB	4MB	148MB
16MB	16MB	64MB	64MB	160MB
16MB	64MB	16MB	64MB	160MB
64MB	64MB	16MB	16MB	160MB

64MB	64MB	64MB		192MB
16MB	64MB	64MB	64MB	208MB
64MB	64MB	16MB	64MB	208MB
64MB	64MB	64MB	64MB	256MB

Using 486 CPU Board

Memory Configurations Using Double-Density SIMMs.
Bank 0	Bank 1	Bank 2	Bank 3	Total
8MB				8MB
8MB	8MB			16MB
32MB				32MB
32MB	32MB			64MB

NOTE: You can only utilise SIMM sockets 0 and 1 when using double-density SIMMs

Using Pentium CPU Board

Memory Configurations
Note that the 590 CPU Board has an additional four SIMM sockets giving eight in total (ie double the capacity shown below)
Bank 0		Bank 1		Total
Socket 0	Socket 1	Socket 2	Socket 3
4MB	4MB			8MB
4MB	4MB	4MB	4MB	16MB
8MB	8MB			16MB
4MB	4MB	8MB	8MB	24MB
8MB	8MB	4MB	4MB	24MB
8MB	8MB	8MB	8MB	32MB
16MB	16MB			32MB
4MB	4MB	16MB	16MB	40MB
16MB	16MB	4MB	4MB	40MB
8MB	8MB	16MB	16MB	48MB
16MB	16MB	8MB	8MB	48MB
16MB	16MB	16MB	16MB	64MB
32MB	32MB			64MB
4MB	4MB	32MB	32MB	72MB
32MB	32MB	4MB	4MB	72MB
8MB	8MB	32MB	32MB	80MB
32MB	32MB	8MB	8MB	80MB
16MB	16MB	32MB	32MB	96MB
32MB	32MB	16MB	16MB	96MB
32MB	32MB	32MB	32MB	128MB
NOTE: You have to use the same type and size of SIMMs on a bank.

Disk Drives

MB	Make	Model	Type	Part Number
170	Quantum	ELS 170 AT	IDE	VA52455
170	Quantum	LPS 170 AT	IDE	SU52565
240	Quantum	LPS 240 AT	IDE	VA52456
270	Quantum	LPS 270 AT	IDE	SU52577
270	Quantum	MV 270 AT	IDE	SU53459
365	Quantum	LT 365 AT	IDE	SU54080
525	Quantum	LPS 525 A	IDE	VA52457
540	Quantum	LPS 540 AT	IDE	SU52578
540	Quantum	MV 540 AT	IDE	SU53460

Tape Drives

MB	Make	Model	Type	Part Number
150	Archive	Viper150	SCSI	VA52459
525	Archive	Viper525	SCSI	VA52460
2-8GB	Archive	DDS-DC	SCSI	VA52461

Floppy Drives

MB	Make	Model	Type	Part Number
2 MB	Sony		3.5"
	Panasonic		5.25"	SU52600

CD-ROM

MB	Make	Model	Type	Part Number
	Sony	CDU561	SCSI	SU52732

Ethernet Options

IBM Token Ring card	XB42148
IBM Token Ring card remote boot ROM	SN47602
3Com Ethernet card, thin/thick (3C503)	XB50902
3Com Ethernet card, UTP/thick (3C503B-TP)	XB50901
3Com triple-combo (thick/thin/UTP) Ethernet card, (3C509)	XB51623
3Com AUI to UTP Transceiver (3C583)	XB50900
3Com EISA Ethernet card (3C579)	XB52462

Jumper Settings

Pentium CPU Board

EPx Motherboard Jumper Settings

1 - Serial 2	6 - Power Connector 2	11 - EISA Slots
2 - Serial 1	7 - SCSI Connectors	12 - Keyboard Controller
3 - Fixed Disk Drive Connector	8 - CPU Board Slot	13 - PS/2 Mouse
4 - Power Connector 2	9 - VESA Local Bus Slots	14 - PS/2 Keyboard
5 - SIMM Sockets	10 - BIOS	15 - Parallel Port

**EPx Motherboard Jumper Settings**
JP1	SCSI	JP2	SCSI
JP3	High Speed Write for Local Bus	JP4	CPU Speed Select for VESA Local Bus
JP6	Security	JP7	Reset Button
JP8	IRQ Select	JP9	Buzzer / Speaker Select
JP10	RTC Select	JP11	RTC Select
JP12	RTC Select	JP13	RTC Select

**SCSI**
JP1, JP2	Open	With SCSI
	Closed	Without SCSI

**High Speed Write for Local Bus**
JP3	1 - 2	0 min wait
	2 - 3	1 min wait

**CPU Speed Select for VESA Local Bus**
JP4	1 - 2	<= 33 MHz
	2 - 3	> 33 MHz

**Security**
JP6	1 - 2	Security Enable
	2 - 3	Security Disable

**Reset Button**
JP7	Closed	Reset Enable
	Open	Reset Disable

**IRQ Select**
JP8	1 - 2	IRQ10
	2 - 3	IRQ 11

**Buzzer / Speaker Select**
JP9	1 - 2	Onboard Buzzer
	2 - 3	External Speaker

**RTC Select**
Jumper	Dallas	B.M.
JP10	2 - 3	1 - 2
JP11	2 - 3	1 - 2
JP12	2 - 3	1 - 2
JP13	2 - 3	1 - 2

486 CPU Board Jumper Settings

JP1	CPU Clock Frequency Setting	JP2	CPU Clock Frequency Setting
JP3	LADS Setting for VESA Local Bus (Master Support)
JP4	PGA CPU Type Setting	JP8	System Speed
JP9	System Speed	JP10	Local Bus Enabling
JP11	SRAM (cache) Size	JP12	SRAM (cache) Size
JP13	SRAM (cache) Size	JP14	SRAM (cache) Size
JP15	SRAM (cache) Type	JP16	SRAM (cache) Type
JP17	CPU Speed Selection for VESA Local Bus	JP18	SRAM (cache) Size
JP19	SRAM (cache) Size	JP20	SRAM (cache) Size

**CPU Clock Frequency Setting**
JP1	Open	25 MHz (DX2-50)
		33 MHz (DX2-66)
	Closed	40 MHz
		50 MHz
JP2	Open	25 MHz (DX2-50)
		40 MHz
	Closed	33 MHz (DX2-66)
		50 MHz

**PGA CPU Type Setting**
JP4	Open	486DX, 486DX2
	1 - 2	486SX
	2 - 3	487SX, ODP 486SX, P24T

**LADS Setting for VESA Local Bus** (Master Support)
JP3	1 - 2	33 MHz
	2 - 3	50 MHz

**Local Bus Enabling**
JP10	1 - 2	Disable
	2 - 3	Enable

**System Speed**
JP8	1 - 2	25 MHz, 33 MHz
	2 - 3	40 MHz, 50 MHz
JP9	1 - 2	25 MHz, 40 MHz
	2 - 3	33 MHz, 50 MHz

**SRAM** (cache) **Size**
JP11, JP19	Open	64 KB
	Closed	128 KB, 256 KB, 1 MB
JP12, JP20	Open	64 KB, 128 KB
	Closed	256 KB, 1 MB
JP13, JP14, JP18	Open	64 KB, 128 KB, 256 KB
	Closed	1 MB

**SRAM** (cache) **Type**
JP15, JP16	1 - 2	Single Bank
	2 - 3	Double Bank

**CPU Speed Selection for VESA Local Bus**
JP17	1 - 2 - 3 - 4	< 33 MHz
	2 - 3	> = 33 MHz

Pentium CPU Board Jumper Settings

JP1	Oscillator Frequency	JP2	Oscillator Frequency
JP3	Oscillator Frequency	JP4	Local Bus
JP11	SRAM (Cache) Size	JP12	SRAM (Cache) Size
JP14	SRAM (Cache) Size	JP15	SRAM (Cache) Size
When upgrading from 486 to Pentium the Flash BIOS should be changed before upgrading the processor board

**Oscillator Frequency**
JP1	1 - 2	33 / 50 / 80 MHz
	2 - 3	40 / 60 MHz
JP2	1 - 2	33 / 66 / 80 MHz
	2 - 3	40 / 50 MHz
JP3	1 - 2	40 / 50 / 66 / 80 MHz
	2 - 3	33 MHz

**Local Bus**
JP4	1 - 2	Enable
	2 - 3	Disable

**SRAM** (Cache) **Size**
JP11, JP12, JP14, JP15	Open	256 KB
	Closed	1 MB

Additional Options

AdLOC Security Card

XB001

Rear Panel


1 - System Power Socket	4 - Parallel Port	7 - Expansion Slots
2 - 9 Pin Serial Port	5 - Keyboard Port	8 - VGA Port
3 - 25 Pin Serial Port	6 - Mouse Port

CMOS Discharge

There is no method of draining CMOS on this mmotherboard

You can access the Setup configuration values by pressing Ctrl-Alt-Esc.

EPX BIOS Setup - Menu

EPX BIOS Setup - System Configuration Menu

EPX BIOS Setup - Basic System Configuration - Page 1

EPX BIOS Setup - Basic System Configuration - Page 2

EPX BIOS Setup - Advanced System Configuration - Page 1

EPX BIOS Setup - Advanced System Configuration - Page 2

EPX BIOS Setup - System Security

Interrupts, Memory and I/O Ports

Interrupts (IRQ)

Interrupts (IRQ)

Interrupts	Default Function	Notes
IRQ 0	System	This cannot be used by an expansion card.
IRQ 1	Keyboard controller	This cannot be used by an expansion card.
IRQ 2	Slave interrupt cont.	This cannot be used at the same time as IRQ9.
IRQ 3	Serial port 2	Available if this feature is disabled in SETUP.
IRQ 4	Serial port 1	Available if this feature is disabled in SETUP.
IRQ 5	Not used
IRQ 6	Floppy disk controller	Available if this feature is disabled in SETUP.
IRQ 7	Parallel port	IRQ 7 is not normally used, and can be used by expansion cards
IRQ 8	Real time clock	This cannot be used by an expansion card.
IRQ 9	Not used
IRQ 10	Not used
IRQ 11	Not used
IRQ 12	Mouse	This cannot be used by an expansion card.
IRQ 13	Co processor	This cannot be used by an expansion card.
IRQ 14	Hard disk controller	Available if this feature is disabled in SETUP.
IRQ 15	Not used

Memory Map

I/O Ports

I/O ports (Hex)	Used by
000 - 01F	DMA controller 1
020 - 027	Interrupt controller 1
030 - 037	Interrupt controller 1
040 - 047	System timer
050 - 057	System timer
060 - 06F	Keyboard controller
070 - 07F	Real time clock, NMI mask
080 - 09F	DMA page register
0A0 - 0BF	Interrupt controller 2
0C0 - 0DF	DMA controller 2
0F0	Clear math coprocessor
0F1	Reset coprocessor
0F8 - 0FF	Math coprocessor
1F0 - 1F7	Hard drive controller
278 - 27F	Parallel port 2
2F8 - 2FF	Serial port 2
378 - 37F	Parallel port 1
3B0 - 3BF	Monochrome display
3C0 - 3CF	EGA, VGA, SVGA
3D0 - 3DF	CGA, VGA, SVGA
3F0 - 3F7	Floppy disk controller
3F7 - 3FF	Serial port 1