==View or Print jumper settings using Fixedsys or New Courier fonts==
PAT48PR V1.4 486 VESA Motherboard
- 2-72 pin SIMM slots (1-64meg FPM DRAM)
- 8-30 pin SIMM slots
- 2-32bit VESA Local Bus slots
- 7-16bit ISA slots
- 64-256k cache support in 8-28pin sockets + 2 TAG RAM sockets
- 64K/128K/256K SRAM Cache.
- AMI 1993 Auto-Detect Bios.
- OPTi 82C495 chipset
- One 237/238 ZIF CPU socket which supports these processors:
INTEL 80486SX/SX2,M6,80486DX/DX2,P24T(Pentium Overdrive)
- Supports speeds of 25/33/40/50/66(internal)MHz.
- Manufactured by: TMC Research Corporation USA
- Website http://www.mycomp-tmc.com
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Speaker J1 pins 1,2,3,4
Power LED + Keylock J1 pins 11,12,13,14,15
Turbo switch J1 pins 7+17
Turbo LED J1 pins 8+18
Reset J1 pins 9+19
IDE LED to case J1 pins 10+20
IDE LED to HDD J2
External battery J4
Internal battery JP1 2-3
External battery JP1 open (use battery on J4)
Clear CMOS BIOS memory JP1 1-2
Colour Monitor JP4 closed
Monochrome Monitor JP4 open
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DRAM CONFIGURATION
------------------------------------------
Group A 30pin SIMMs = Banks 0 + 1
72pin SIMMs = Banks 2 + 3
------------------------------------------
Group B 72pin SIMMs = Banks 0 + 1
30pin SIMMs = Banks 2 + 3
------------------------------------------
Group C 72pin SIMMs = Banks 0 + 1
When using Dual Density (double sided) 72pin SIMMs the 30pin slots
must remain empty. Single Density SIMMs maybe mixed.
Check your BIOS for parity/non-parity settings, use non-parity if possible.
DRAM Select RNB1+2 RNC1+2 RND1+2
--------------------------------------------------------
Group A open closed open
Group B open open closed
Group C closed open open
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Cache Size Bank 0 Bank 1 TAG U43 TAG U44
--------------------------------------------------------------------
64K 4 - 8kx8 4 - 8kx8 1 - 8kx8 1 - 64kx1
128K 4 - 32kx8 none 1 - 8kx8 1 - 64kx1
256K 4 - 32kx8 4 - 32kx8 1 - 32kx8 1 - 64kx1
Cache Select RND RNE RNF
--------------------------------------------------------------
64K closed open open
128K open closed open
256K open open closed
=====================================================================
CPU Select RNA3 RNB3 RNC3
---------------------------------------------------------------
80486SX open open closed
80487SX open closed open
80486DX/DX2 closed open open
Pentium Overdrive open closed open
CPU Speed JP2 W13 W14 W15 W16
---------------------------------------------------------------
20 MHz 2-3 open closed open open
25 MHz 2-3 open open closed open
33 MHz 2-3 open open open closed
40iMHz 2-3 open closed open open
40 MHz 1-2 open closed open open
50iMHz 2-3 open open closed open
50 MHz 1-2 open open closed open
66iMHz 2-3 open open open closed
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CPU type JP3 JP5 JP6 JP7
---------------------------------------------
80486DX-40/50 closed closed closed 2-3
All others open open open 1-2
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VESA WAIT STATE CONFIGURATION with (2pin or 6pin jumpers)
CPU type VESA cards installed RNE1 RNE2
-------------------------------------------------------------
80486DX-50 1 open closed
All others 2 closed open
------------------------> OR <-----------------------------
CPU type VESA cards installed W21 W22 W23
-------------------------------------------------------------
80486DX-50 1 pin1 + pin1 2-3
All others 2 closed closed 1-2
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