Thread: UM4981 Al0 Ver:1 Motherboard User Manual

- 4-72 pin SIMM slots (1-64meg FPM DRAM)
- 2-32bit VESA Local Bus slots
- 6-16bit ISA slots
- 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- PHOENIX Auto-Detect Flash Bios with Energy Mgmt.
- Supports LBA Mode Control & Large Disk DOS Compatibility.
- Green PC Connector
- external 3.6v lithium battery not included
- UMC UM8498F 9452 chipset
- Supports 3.3v/5volt CPU's and clock speeds 2x/3x.
- 237pin ZIF CPU socket which supports these processors:
INTEL 80486SX/SX2,80486DX/DX2/DX4,P24D
SL80486SX/SX2/DX/DX2
CYRIX CX486S(M6),CX486DX/DX2(M7)
AMD AM486DX/DX2,AM486DXL/DXL2
UMC GREEN CPU U5S-SUPER
- Supports speeds of 25/33/40/50/66/75/100(internal)MHz.
- 32bit Bus master for 2 IDE interfaces supporting 4 IDE devices.
- Multi-I/O chip supports 2 - 16550 Fast UART serial ports
1 - parallel port with EPP & ECP, 1 - floppy disk interface.
- Manufactured by: ELITEGROUP COMPUTER SYSTEMS

==View or Print jumper settings using Fixedsys or New Courier fonts==

UM4981 AIO Ver:1.0 486 VESA Motherboard

- BIOS ID String UM4981 A10 V1.2 9-16-1994 Phoenix Bios Version 4.03
- BIOS ID string UM4981 AIO v1.3 01/12/1995 Phoenix bios ver 4.03
- 4-72 pin SIMM slots (1-64meg FPM DRAM)
- 2-32bit VESA Local Bus slots
- 6-16bit ISA slots
- 64k-256k CACHE support in 8-28pin sockets + 1 TAG RAM socket
- PHOENIX Auto-Detect Flash Bios with Energy Mgmt.
- Supports LBA Mode Control + Large Disk DOS Compatibility.
- Green PC Connector
- external 3.6 or 6v battery not included
- UMC UM8498F 9452 chipset
- Supports 3.3v/5volt CPU's and clock speeds 2x/3x.
- 237pin ZIF CPU socket which supports these processors:
INTEL 80486SX/SX2,80486DX/DX2/DX4,P24D
SL80486SX/SX2/DX/DX2
CYRIX CX486S(M6),CX486DX/DX2(M7)
AMD AM486DX/DX2,AM486DXL/DXL2
UMC GREEN CPU U5S-SUPER
- Supports speeds of 25/33/40/50/66/75/100(internal)MHz.
- 32bit Bus master for 2 IDE interfaces supporting 4 IDE devices.
- Multi-I/O chip supports 2 - 16550 Fast UART serial ports
1 - parallel port with EPP + ECP, 1 - floppy disk interface.
- Manufactured by: ELITEGROUP COMPUTER SYSTEMS INC.
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Parallel port J1 External battery JP1
Serial port 1 J2 Green PC connector JP15
Serial port 2 J3 Power LED/keylock JP30
Floppy interface J4 Speaker JP31
Primary IDE interface J5 Reset switch JP32
Secondary IDE inter J6 Turbo LED JP33
IDE interface LED JP39 32bit VESA slots SL1,SL2
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5volt Flash Bios JP2 1-2
12volt Flash Bios JP2 2-3
On board I/O enabled JP3 1-2
On board I/O disabled JP3 2-3
Parallel port IRQ7 JP4 2-3
Parallel port IRQ5 JP4 1-2
Parallel port normal JP8 open
Parallel port ECP mode JP8 closed
Primary IDE enabled JP35 1-2
Primary IDE disabled JP35 2-3
Secondary IDE enabled JP36 1-2
Secondary IDE disabled JP36 2-3
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DRAM CONFIGURATION
Size Bank 0 Bank 1 Bank 2 Bank 3
1MB (1) 256Kx36 NONE NONE NONE
2MB (1) 256Kx36 (1) 256Kx36 NONE NONE
2MB NONE NONE (1) 512Kx36 NONE
3MB (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 NONE
4MB (1) 256Kx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36
4MB NONE NONE (1) 512Kx36 (1) 512Kx36
4MB (1) 1mx36 NONE NONE NONE
5MB (1) 1Mx36 (1) 256Kx36 NONE NONE
6MB (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 NONE
7MB (1) 1Mx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36
8MB (1) 1Mx36 (1) 1Mx36 NONE NONE
8MB NONE NONE NONE (1) 2Mx36
9MB (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 NONE
10MB (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 (1) 256Kx36
12MB (1) 1Mx36 (1) 1M x36 (1) 1Mx36 NONE
13MB (1) 1Mx36 (1) 1Mx36 (1) 1mx36 (1) 256Kx36
16MB (1) 1Mx36 (1) 1Mx36 (1) 1Mx36 (1) 1Mx36
16MB NONE NONE (1) 2Mx36 (1) 2Mx36
16MB (1) 4Mx36 NONE NONE NONE
17MB (1) 4Mx36 (1) 256Kx36 NONE NONE
18MB (1) 4Mx36 (1) 256Kx36 (1) 256Kx36 NONE
19MB (1) 4Mx36 (1) 256Kx36 (1) 256Kx36 (1) 256Kx36
20MB (1) 4Mx36 (1) 1Mx36 NONE NONE
21MB (1) 4Mx36 (1) 1Mx36 (1) 256Kx36 NONE
22MB (1) 4Mx36 (1) 1Mx36 (1) 256Kx36 (1) 256Kx36
24MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 NONE
25MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 (1) 256Kx36
28MB (1) 4Mx36 (1) 1Mx36 (1) 1Mx36 (1) 1Mx36
32MB (1) 4Mx36 (1) 4Mx36 NONE NONE
33MB (1) 4Mx36 (1) 4Mx36 (1) 256Kx36 NONE
34MB (1) 4Mx36 (1) 4Mx36 (1) 256Kx36 (1) 256Kx36
36MB (1) 4Mx36 (1) 4Mx36 (1) 1Mx36 NONE
37MB (1) 4Mx36 (1) 4Mx36 (1) 1Mx36 (1) 256Kx36
40MB (1) 4Mx36 (1) 4Mx36 (1) IMx36 (1) 1Mx36
48MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 NONE
49MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 256Kx36
52MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 1Mx36
64MB (1) 4Mx36 (1) 4Mx36 (1) 4Mx36 (1) 4Mx36
================================================== =====================
CACHE Size Bank 0 Bank 1 TAG
---------------------------------------------------------
64k 4 - 8kx8 4 - 8kx8 1 - 8kx8
128k 4 - 32kx8 none 1 - 8kx8
256k 4 - 32kx8 4 - 32kx8 1 - 32kx8
CACHE config JP22 JP23 JP24 JP25
-------------------------------------------------
64k 2-3 open open open
128k 1-2 1-2 open closed
256k 2-3 2-3 closed closed

CPU Type JP16 JP17 JP18 JP19 JP20 JP21
-----------------------------------------------------------------------
80486SX/SX2 open open 2-3 open open 2-3
80486DX/DX2 open open 2-3 open 1-2 1-2,3-4
80486DX4 1-2,3-4 5-6 1-2 1-2 1-2 1-2,3-4
P24D 1-2,3-4 3-4,5-6 1-2,4-5 1-2,4-5 1-2 1-2,3-4
P24T 1-2,3-4 5-6 1-2 1-2 2-3 1-2,3-4
CX486S 2-3,4-5 2-3,4-5 1-2,3-4,5-6 1-2,3-4 open 2-3
CX486DX/DX2 2-3 2-3,4-5 1-2,3-4,5-6 1-2,3-4 1-2 1-2,3-4
SL80486SX/SX2 1-2,3-4 5-6 1-2 1-2 open 2-3
SL80486DX/DX2 1-2,3-4 5-6 1-2 1-2 1-2 1-2,3-4
AM486DX/DX2 open open 2-3 open 1-2 1-2,3-4
AM486DXL/DXL2 open 1-2 2-3 2-3 1-2,3-4 1-2,3-4
U5S open 1-2 2-3 2-3 3-4 2-3
================================================== ======================
CPU Speed JP9 JP10 JP11
-------------------------------------
25MHz open open closed
33MHz closed closed closed
40MHz open closed closed
50iMHz open open closed
50MHz closed open open
66iMHz closed closed closed
75iMHz open open closed
100iMHz closed closed closed
INTEL 80486DX4 Multiplier JP29
---------------------------------------
2x 2-3
3x open
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CPU Voltage JP26
---------------------------------------
3.3v (on board regulator) 3-4
3.3v (special power supply) 5-6
5v (standard power supply) 1-2
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VESA Wait States JP27
------------------------------
0 wait state open
1 wait state closed
BUS Speed Config
CPU Speed JP28
------------------------------
<= 33MHz open
> 33MHz closed
ECP Mode Config
Setting JP5 JP6
------------------------------------
DRQ1/DACK1 1-2 1-2
DRQ3/DACK3 2-3 2-3
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HARD DRIVE TIMING CONFIG
Active Time Cycle Time Speed HDD Capacity JP37 JP38
---------------------------------------------------------------------
15T 30T 1 40/50MHz 2-3 2-3
15T 19T 2 25/33MHz 1-2 2-3
9T 13T 3 <20MHz/enhanced IDE 2-3 1-2
18T 37T 0 <40MHz/non ATA support 1-2 1-2
(if anyone can supply more detailed info from their manual send it in)
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