YOUNG MICRO SYSTEMS, INC.
VEGA 486 PCI/VESA
|
Processor |
80486SX/80486DX/80486DX2/Pentium Overdrive |
|
Processor Speed |
20/25/33/50(internal)/66(internal)MHz |
|
Chip Set |
Intel |
|
Max. Onboard DRAM |
128MB |
|
Cache |
64/128/256/512KB |
|
BIOS |
AMI |
|
Dimensions |
330mm x 218mm |
|
I/O Options |
32-bit VESA local bus slots (3), PCI bus slots (4) |
|
NPU Options |
None |
|
CONNECTIONS |
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|
Purpose |
Location |
Purpose |
Location |
|
PS/2 mouse port |
J1 |
Reset switch |
J5 |
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Power LED & keylock |
J2 |
32-bit VESA Local bus slots |
SL1, SL2, SL3 |
|
Speaker |
J3 |
32-bit PCI slots |
P1, P2, P3, P4 |
|
Turbo switch |
J4 |
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USER CONFIGURABLE SETTINGS |
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|
Function |
Jumper |
Position |
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|
Factory configured - do not alter |
J6 |
Open |
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Factory configured - do not alter |
JP15 |
Open |
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Parity check enabled |
JP16 |
Open |
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Parity check disabled |
JP16 |
Closed |
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Monitor type select color |
JP21 |
pins 1 & 2 closed |
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Monitor type select monochrome |
JP21 |
pins 2 & 3 closed |
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Factory configured - do not alter |
JP41 |
Open |
|
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Factory configured - do not alter |
JP43 |
Open |
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Factory configured - do not alter |
JP44 |
Open |
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Factory configured - do not alter |
JP81 |
Open |
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CMOS CONFIGURATION |
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|
Type |
JP22 |
JP23 |
JP26 |
|
CMOS memory normal |
Closed |
Open |
Open |
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CMOS memory clear |
Open |
Closed |
Closed |
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DRAM CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
|
2MB |
(2) 256K x 36 |
NONE |
|
4MB |
(2) 256K x 36 |
(2) 256K x 36 |
|
8MB |
(2) 1M x 36 |
NONE |
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10MB |
(2) 1M x 36 |
(2) 256K x 36 |
|
16MB |
(2) 1M x 36 |
(2) 1M x 36 |
|
32MB |
(2) 4M x 36 |
NONE |
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34MB |
(2) 4M x 36 |
(2) 256K x 36 |
|
40MB |
(2) 4M x 36 |
(2) 1M x 36 |
|
64MB |
(2) 4M x 36 |
(2) 4M x 36 |
|
64MB |
(2) 8M x 36 |
NONE |
|
66MB |
(2) 8M x 36 |
(2) 256K x 36 |
|
72MB |
(2) 8M x 36 |
(2) 1M x 36 |
|
96MB |
(2) 8M x 36 |
(2) 4M x 36 |
|
128MB |
(2) 8M x 36 |
(2) 8M x 36 |
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CACHE CONFIGURATION |
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|
Size |
Bank 0 |
Bank 1 |
TAG |
|
64KB |
(4) 8K x 8 |
(4) 8K x 8 |
(2) 16K x 4 |
|
128KB |
(4) 32K x 8 |
NONE |
(2) 16K x 4 |
|
256KB |
(4) 32K x 8 |
(4) 32K x 8 |
(2) 16K x 4 |
|
512KB |
(4) 128K x 8 |
NONE |
(2) 32K x 4 |
|
CACHE JUMPER CONFIGURATION |
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|
Size |
JP6 |
JP7 |
JP8 |
JP9 |
|
64KB |
Open |
Open |
Open |
Open |
|
128KB |
Closed |
Open |
Open |
Closed |
|
256KB |
Closed |
Closed |
Open |
Closed |
|
512KB |
Closed |
Closed |
Closed |
Closed |
|
CACHE JUMPER CONFIGURATION (CON'T) |
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|
Size |
JP10 |
JP11 |
JP17 |
JP18 |
|
64KB |
Open |
Open |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
128KB |
Open |
Open |
pins 2 & 3 closed |
pins 1 & 2 closed |
|
256KB |
Closed |
Open |
pins 1 & 2 closed |
pins 2 & 3 closed |
|
512KB |
Closed |
Closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
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L2 CACHE CONFIGURATION |
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|
Size |
JI1 |
JI2 |
JI3 |
|
Standard |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Interleaved |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
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CACHE CONTROL CONFIGURATION |
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|
Wait states |
Tag bit size |
JP14 |
JP20 |
|
O wait states |
7 bit |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
1 wait state |
8 bit |
pins 2 & 3 closed |
pins 2 & 3 closed |
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CACHE MODE CONFIGURATION (L2) |
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|
Type |
JP4 |
JP19 |
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L2 cache (write-through) |
Open |
pins 1 & 2 closed |
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L2 cache (write-back) |
Closed |
pins 1 & 2 closed |
|
L2 cache (disabled) |
N/A |
pins 2 & 3 closed |
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CACHE MODE CONFIGURATION (PENTIUM OVERDRIVE) |
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|
Type |
JP2 |
JP60 |
|
Overdrive (write-through) |
Open |
pins 1 & 2 closed |
|
Overdrive (write-back) |
Closed |
pins 2 & 3 closed |
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CPU TYPE CONFIGURATION |
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|
Type |
JP1 |
JP3 |
JP12 |
JP13 |
JP27 |
JP28 |
|
80486SX-20 |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3 |
Closed |
Closed |
|
80486SX-25 |
2 & 3 |
1 & 2 |
2 & 3 |
2 & 3 |
Open |
Closed |
|
80486SX-33 |
2 & 3 |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
Open |
|
80486DX-20 |
1 & 2, 3 & 4 |
1 & 2 |
2 & 3 |
2 & 3 |
Closed |
Closed |
|
80486DX-25 |
1 & 2, 3 & 4 |
1 & 2 |
2 & 3 |
2 & 3 |
Open |
Closed |
|
80486DX-33 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
Open |
|
80486DX2-50 |
1 & 2, 3 & 4 |
1 & 2 |
2 & 3 |
2 & 3 |
Open |
Closed |
|
80486DX2-66 |
1 & 2, 3 & 4 |
1 & 2 |
1 & 2 |
2 & 3 |
Closed |
Open |
|
Overdrive |
1 & 2, 3 & 4 |
2 & 3 |
1 & 2 |
2 & 3 |
Closed |
Open |
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Note: Pins designated should be in the closed position. |
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CPU VOLTAGE CONFIGURATION |
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|
Voltage |
JP5/A |
JP5/B |
JP5/C |
JP5/D |
|
5.0V CPU |
Open |
Open |
Closed |
Closed |
|
80486DX4 CPU |
Open |
Open |
Open |
Open |
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VESA WAIT STATE/BUS SPEED CONFIGURATION |
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CPU speed |
Wait states |
JP36 |
JP37 |
|
< 33MHz |
0 wait states |
Open |
Open |
|
> 33MHz |
1 wait state |
Closed |
Closed |
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PCI ADDRESS CONFIGURATION |
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|
Address (Slot 1) |
Address (Slot 2) |
JP70 |
JP71 |
|
Address 17 |
Address 17 |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Address 28 |
Address 29 |
pins 2 & 3 closed |
pins 2 & 3 closed |
|
PCI IRQ CONFIGURATION |
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|
IRQ Type |
JP33 (IRQ9) |
JP34 (IRQ10) |
JP35 (IRQ11) |
JP38 (IRQ14) |
|
Standard |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
pins 1 & 2 closed |
|
Inverted |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
pins 2 & 3 closed |
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PCI LEVEL TRIGGER IRQ CONFIGURATION |
|
|
IRQ Type |
JP39 |
|
IRQ9 |
pins 1 & 2 closed |
|
IRQ10 |
pins 3 & 4 closed |
|
IRQ11 |
pins 5 & 6 closed |
|
IRQ14 |
pins 7 & 8 closed |
|
IRQ15 |
pins 9 & 10 closed |
|
SYSTEM BIOS CONFIGURATION |
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|
Type |
JP24 |
JP25 |
|
Normal |
Open |
pins 1 & 2 closed |
|
Flash |
Closed |
pins 1 & 2 closed |
|
Recover |
Open |
pins 2 & 3 closed |