==View or Print jumper settings using Fixedsys or New Courier fonts==
UM4980 V1.1 486 VESA Motherboard
- BIOS ID string UM4980 v1.1 01/12/94--2C4X6H01-00
- the optional 41 page ver:1.1 PDF manual is available as a 1.1meg archive.
- the optional 46 page ver:2.1 GIF manual is available as a 2.1meg archive.
In securing these manuals certain expenses were paid and in
an effort to recover these fees its only available by donation.
- 4-72 pin SIMM slots (1-64meg FPM DRAM)
- 3-32bit VESA Local Bus slots
- 7-16bit ISA slots
- 1-8bit XT slot
- 128k-1024k CACHE support in 8-32pin sockets + 1 TAG RAM socket
- PHOENIX Bios Ver:4.03 Auto-Detect Flash Bios with Energy Mgmt.
- Supports LBA Mode Control + Large Disk DOS Compatibility.
- Green PC Connector
- external 3.6v battery not included
- UMC UM8498F chipset
- Supports 3.3v/3.45v/5volt CPU's and clock speeds 2x/3x.
- One 237 ZIF CPU socket 3 which supports these processors:
INTEL 80486SX/SX2,80486DX/DX2/DX4,P24D
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.
- Manufactured by: ELITEGROUP COMPUTER SYSTEMS
- WEBSITE http://www.ecsusa.com
===========================================================================
External Battery J2 Reset Switch J30
Green PC connector J27 Turbo Switch J31
Speaker J29 Turbo LED J28
Power LED + keylock J32 32bit VESA slots SL1-SL3
=======================================================================
Battery J2
----------------------------
Rechargeable 2-3
Clear CMOS 3-4 (short for 3-4secs only with power off)
External installed (pin1 VDD 3.6volt lithium, pin4 ground)
(battery pack available at most stores)
=======================================================================
BIOS Select JP1
----------------------------
EPROM open
5v Flash 1-2
12v Flash 2-3
Keyboard Select JP3
----------------------------
external open
internal closed
=======================================================================
VESA Bus Wait State JP26
-----------------------------
0 W/S 25MHZ OPEN
1 W/S 33MHZ CLOSED
-----------------------------------------------------------------------
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 NONE (1) 512Kx36
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
1OMB (1) 1Mx36 (1) 1Mx36 (1) 256Kx36 (1) 256Kx36
12MB (1) 1Mx36 (1) 1Mx36 (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) 1Mx36 (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
This board only supports double density simms (8meg) in Banks 2 + 3.
An 8meg 72 pin FPM simm module is defined as: (1) 2Mx36
=======================================================================
CPU Selector JP14 JP15 JP16 JP17 JP18 JP19
-------------------------------------------------------------------------
80486SX/SX2 open 2-3 open open 2-3 open
80486DX/DX2 open 1-2,3-4 1-2 open 2-3 open
80486DX2 (WB) 1-2,3-4 1-2,3-4 1-2 3-4,5-6 1-2,4-5 1-2,4-5
80486DX4 1-2,3-4 1-2,3-4 1-2 5-6 1-2 1-2
AM486DXL open 1-2,3-4 1-2,3-4 1-2 2-3 2-3
AM486DX open 1-2,3-4 1-2 open 2-3 open
AM486DXL2 open 1-2,3-4 1-2,3-4 1-2 2-3 2-3
AM486DX2 open 1-2,3-4 1-2 open 2-3 open
CX486S 2-3,4-5 2-3 open 2-3,4-5 1-2,3-4,5-6 1-2,3-4,5-6
CX486DX/DX2 2-3 1-2,3-4 1-2 2-3,4-5 1-2,3-4,5-6 1-2,3-4
SL80486SX/SX2 1-2,3-4 2-3 open 5-6 1-2 1-2
SL80486DX/DX2 1-2,3-4 1-2,3-4 1-2 5-6 1-2 1-2
UMC U5S open 2-3 3-4 1-2 2-3 2-3
=======================================================================
CPU Speed JP7 JP8 JP9 JP25 (Bus Speed)
-----------------------------------------------------
25MHZ closed open open open
33MHZ closed closed closed open
40MHZ closed closed open closed
50iMHZ closed open open closed
50MHZ open open closed closed
66iMHZ closed closed closed closed
75iMHZ closed open open closed
100iMHZ closed closed closed closed
=======================================================================
80486DX4 CPU Speed JP24
-----------------------------
2x 2-3
3x open
=======================================================================
CPU Voltage JP20 JP21 JP22
-------------------------------------
3.3V 2-3 2-3 2-3
3.45V 2-3 2-3 1-2
5V 1-2 1-2 open
=======================================================================
Cache Bank 0 Bank 1 TAG
---------------------------------------------------------
128K 4 - 32kx8 none 1 - 8kx8
256K 4 - 64kx8 none 1 - 32kx8
256K 4 - 32kx8 4 - 32kx8 1 - 32kx8
512K 4 - 64kx8 4 - 64kx8 1 - 32kx8
512K 4 - 128kx8 none 1 - 32kx8
1024K 4 - 128kx8 4 - 128kx8 1 - 64kx8
Cache JP4 JP5 JP6 JP10 JP11 JP12 JP13
-------------------------------------------------------------
128K 1-2 1-2 open open open open open
256K 1-2 1-2 1-2 open open open closed
256K 2-3 2-3 open open open open closed
512K 2-3 2-3 2-3 open closed open closed
512K 1-2 2-3 2-3 1-2 closed open closed
1024K 2-3 2-3 2-3 2-3 closed closed closed
=======================================================================
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