I got really frustrated with not being able to answer questions because of
how little I knew about the system, so I stripped it to the chasis and
inspected every single number and every single pin on every single
component. Low and behold, when i brought the motherboard out into the
light - I'm still amazed it didn't combust or shrivel up - it had
descriptors! Lots of 'em! Faded little things escaped notice under a mere
flashlight. So, with the help of my trusty magnifying glass, I have spent
the last few hours blinding myself to document every aspect of the system
for your review.
Please, pay particular attention to the CPU settings on the motherboard and
tell me if they are correct as is or need to be modified. Also, what about
that first voltage setting on the motherboard (JP1)? Isn't something
supposed to be jumpered there?
Any suggestions are appreciated!
Thanks,
Drew
[EMAIL PROTECTED]
** !!WARNING!! **
The following is a list of component settings that is long, boring, and
maybe even tedious. It is the stuff that separates the men from the boys;
where newbies knash their teeth on the bones of slim pickings and
enthusiasts gorge their bloodlust to make the inane possible and rejuvenate
a worthless pile of dusty circuit boards into a raging inferno of computing
power! Of course, if that particular drama doesn't appeal to you, then
maybe you can help out a poor college kid and be the Hero of the Day.
On to the Beast...
**************************************************************
486 System notes
A quick appendix:
closed = jumpered = on
open = no jumper = off
1-2 = jumper on pins 1 and 2
POWER SUPPLY:
LSI Switching Power Supply
230 Watts
AC Input: 115/230V ~50/60Hz 6/3A
DC Output:
+5V -5V +12V -12V
23A 0.5A 9A 0.5A
MOTHERBOARD:
UM4980 v. 1.1
AT form
Socket 3
Battery:
Tadiran TL-5207/W 0193
3.6V High energy Lithium battery
4 pin connector - pin 2 filled
Chipset:
UMC UM8498F
CPU:
AMD 40486-DX4-120SV8B
RAM:
256KB Data Cache RAM (8x8)
4 72-pin RAM banks
BIOS:
Phoenix MB 486 ISA BIOS ROM - A246308 ©1993
Slots:
1 ISA
4 EISA
3 EISA - VESA
Jumpers:
1: 3 pins
Definition: Voltage setting
JP1: 1-2 => +5V
JP1: 2-3 => +12V
Current Setting:
no pins jumpered
2: 4 pins (pin 2 broken)
Definition: Battery plug
3: could not locate
4, 5, 6, 10, 11, 12, 13:
Definition: Cache Data RAM
JP4 JP5 JP6 JP10
JP11 JP12 JP13
128KB (32k 8*4) 1-2 1-2 1-2 off
off off off
256KB (64k 8*4) 1-2 1-2 off off
off off on
256KB (32k 8*8) 2-3 2-3 2-3 off
off off on
512KB (64k 8*8) 2-3 2-3 2-3 off
on off on
512KB (128k 8*4) 1-2 2-3 2-3 1-2
on off on
1 MB (128k 8*8) 2-3 2-3 2-3 2-3
on on on
Current Setting:
256KB (32k 8*8) 2-3 2-3 off off
off off on
7, 8, 9:
Definition: Motherboard Clock Speed
JP7 JP8 JP9
25 on off off
33 on on on
40 on on off
50 off off on
Current Setting:
40 on on off
14, 15, 16, 17, 18, 19:
Definition: CPU setting
JP14 JP15 JP16
JP17 JP18 JP19
486SX open 2-3 open
open 2-3 open
486DX/DX2 open 1-2,3-4 1-2
open 2-3 open
486SX/SL 3-4,1-2 2-3 open
5-6 1-2 1-2
486DX/SL 1-2,3-4 1-2,3-4 1-2
5-6 1-2 1-2
P24D 1-2,3-4 1-2,3-4 1-2
3-4,5-6 1-2,4-5 1-2,4-5
P24T 1-2,3-4 1-2,3-4 2-3
5-6 1-2 1-2
M6 2-3,4-5 2-3 open
2-3,4-5 1-2,3-4,5-6 1-2,3-4,5-6
AMD486DXLT open 1-2,3-4
1-2,3-4 1-2 2-3 2-3
P24C(DX4) 1-2,3-4 1-2,3-4 1-2
5-6 1-2 1-2
U5 open 2-3 3-4
1-2 2-3 2-3
M7 2-3 1-2,3-4 1-2
2-3,4-5 1-2,3-4,5-6 1-2,3-4,5-6
Current Setting:
486DX/SL 1-2,3-4 1-2,3-4 1-2
5-6 1-2 1-2
P24C(DX4)
20, 21, 22:
Definition: Voltage Setting
JP20 JP21 JP22
5V 1-2 1-2 open
3.45V 2-3 2-3 1-2
3.3V 2-3 2-3 2-3
Current Setting:
3.3V 2-3 2-3 2-3
23: could not locate
24: 3 pins
Definition: Clock Multiplier
Open for "DX4" int clock 3X
Closed for "DX4" int clock 2X
Current Setting:
Open for "DX4" int clock 3X
25:
Definition: UNKNOWN
Current Setting: closed
26:
Definition: UNKNOWN
Current Setting: closed
27:
Definition: Suspend/Resume
Current Setting: open
28:
Definition: LED
29:
Definition: Speaker
30:
Definition: Reset
31:
Definition: Turbo
Current Setting: closed
32:
Definition: Keylock
Current Setting: open
IDE CONTROL ADAPTER:
GoldStar Prime 2C 9414 (EB52)
FCC ID: JGBPRIME2C
IDE interface
Connectors:
Parallel Port (25 pins - female)
DB-9 Serial Port (9 pins - male)
DB-25 Serial Port (25 pins - male)
Game Port (?? pins - female)
Connections:
CON1: 16 pins (8x2)
Definition: Game Bus
Current Connected: none
CON2: 10 pins (5x2)
Definition: Serial Bus
Current Connected: none
CON3: 40 pins (20x2)
Definition: IDE Bus
Current Connected: one IDE drive
CON4: 34 pins (17x2)
Definition: FDD bus
Current Connected: none
CON5: 10 pins (5x2)
Definition: Serial Bus
Current Connected: one DB-9 serial port
CON6: not located
CON7: 2 pins
Definition: UNKNOWN
Current Setting: open
Jumpers: all 3 pins - on/off unmarked, so assuming based on performance
results
J1: FDD ENA/DISA
Current Setting: off
J2: FDD Address
Current Setting: on
J3: IDE ENA/DISA
Current Setting: on
J4: IDE Address
Current Setting: on
J5: SIO0 ENA/DISA
Current Setting: on
J6: SIO0 Address
Current Setting: on
J7: SIO1 ENA/DISA
Current Setting: on
J8: SIO1 Address
Current Setting: on
J9: PRT ENA/DISA
Current Setting: on
J10: PRT Address
Current Setting: on
J11: Game ENA/DISA
Current Setting: on
SCSI CONTROL ADAPTER:
Adaptec AHA-2840A/42A
FCC ID: FGT2842A
EIDE-VESA interface
Connectors:
External:
SCSI-2 Connector (50 pins)
Internal:
SCSI-2 Connector (50 pins)
FDD Connector (34 pins)
Jumpers:
J1: LED connections (4 pins)
J2: FDD connector
J3: SCSI-2 connector
J4: Ext. SCSI-2 connector
J5: UNKNOWN (2 pins)
Current Setting: closed
Switchs:
1, 2, 3, 4:
Definition: I/O Port Settings
I/O Port sw1 sw2 sw3 sw4
1C00H off off off off
2C00H on off off off
3C00H off on off off
4C00H on on off off
5C00H off off on off
6C00H on off on off
7C00H off on on off
8C00H on on on off
9C00H off off off on
AC00H on off off on
BC00H off on off on
CC00H on on off on
DC00H off off on on
EC00H on off on on
FC00H off on on on
Reserved on on on on
Current Setting:
1C00H off off off off
5:
Definition: Enable/Disable Floppy
on = Disable Floppy
off = Enable Floppy
Current Setting:
on = Enable Floppy
6, 7:
Definition: BIOS Address
BIOS addr sw6 sw7
D8000H off off
C8000H on off
D0000h off on
E0000h on on
Current Setting:
D8000H off off
8:
Definition: Enable/Disable BIOS Software Configuration
on = BIOS disable
off = BIOS enable
Current Setting:
off = BIOS enable
VIDEO ADAPTER:
Diamond Computer Systems Speedstar Pro VLB Rev. B2 ©1994
FCC ID: FTUVL5426A
EIDE-VESA interface
Chipset:
Cirrus Logic CL-GD5428-80QC-A
ROM:
Diamond Speedstar Pro v. 3.05 © 1993
External Connector:
VGA connector (15 pins - female)
Jumpers:
J1: UNKNOWN - 26 pins (13x2)
J2-J10: not found
J11: IRQ2
Current Setting: closed
ETHERNET ADAPTER:
3Com EtherLink III 3C509B-TP ©1995
ASSY 03-0021-203 REV-A
FCC ID: DF63C509B
EIDE interface
10 MB/s signalling rate
Chipset:
Lucent 40-01304 (40-0130-004)
External Connectors:
AUP ethernet connector (15 pins)
10-base-T ethernet connector (8 pin plug)
Jumpers: none
DRIVES:
FDD:
Teac FD-235-HF
P/N: 19307762-40
Jumpers:
DS0:
Definintion: UNKNOWN
Current Setting: open
DS1:
Definition: UNKNOWN
Current Setting: closed
IDE:
Samsung WN312021A 1.2 GB
Specifications:
Cylinders: 2340
Heads: 16
Sectors: 63
Size: 1.2 GB
Jumpers:
DXX:
Definition: UNKNOWN
Current Setting: open
DCF:
Definition: UNKNOWN
Current Setting: open
CSEL:
Definition: Set Drive to Cable Select
Current Setting: open
C/D:
Definition: Set Drive as Master
Current Setting: closed
(Slave mode set by all open connections)
SCSI:
Seagate ST51080N 1.5GB?
no drive information available through external inspection
DEVICE TREE:
(excludes power supply)
Motherboard--------------------------Battery
\
\_____________________________Ethernet Adapter
\
\____________________________Video Adapter
\
\___________________________IDE Adapter
\ \________IDE Harddrive
\
\_________________________SCSI Adapter
\________Floppy Drive
\
\______SCSI Drive
*********************************************************
_______________________________________________
Redhat-list mailing list
[EMAIL PROTECTED]
https://listman.redhat.com/mailman/listinfo/redhat-list
- RE: Speed optimization for 486DX Drew Hunt
- RE: Speed optimization for 486DX Mikkel L. Ellertson
- RE: Speed optimization for 486DX Drew Hunt
- RE: Speed optimization for 486DX Mikkel L. Ellertson
- Re: Speed optimization for 486DX Edward Dekkers
- RE: Speed optimization for 486DX Drew Hunt
- RE: Speed optimization for 486DX Reiner Buehl
- Re: Speed optimization for 486DX fred smith
- Re: Speed optimization for 486DX Krikofer
- RE: Speed optimization for 48... Drew Hunt
- Re: Configuratin of a 486DX4 [was ... Drew Hunt
- Re: Configuratin of a 486DX4 ... Jerry Queirolo
- Re: Configuratin of a 486DX4 ... Brian Ashe
- RE: Configuratin of a 486DX4 ... Drew Hunt
- RE: Configuratin of a 486DX4 ... Drew Hunt
- Re: RE: Configuratin of a 486... Jack Bowling
- RE: RE: Configuratin of a 486... Drew Hunt
- Re: Configuratin of a 486DX4 ... Leonard den Ottolander
- Re: Speed optimization for 486DX Edward Dekkers
- RE: Speed optimization for 486DX Drew Hunt
- Re: Speed optimization for 486DX RaghuNath L
