Description
| Zombie Components LLC | Sylmar, California |
Dell System 486P system board with its matching Dell 3-slot ISA riser card. LPX form
factor, Dell Computer Corporation, copyright 1991. An Intel i486SX-20 processor is
installed under the heatsink and one 72-pin SIMM is fitted in socket S1. The board was
photographed running its own BIOS Setup utility, both screens, where BIOS A07 reports
Microprocessor i486SX-20, Total Memory 4096 KB, Video Memory 512 KB and no system
password set. Sold as a board level assembly. This is not a complete computer.
60 Day Money Back Guarantee. Powered on, POSTs and enters BIOS Setup; BIOS A07 reports i486SX-20, 4096 KB total memory, 512 KB video memory.
- Board POSTs and reaches BIOS Setup, both screens photographed.
- CPU present and identified by BIOS as i486SX-20; heatsink fitted.
- 4 MB installed, 3 of 4 SIMM sockets free, 64 MB maximum.
- Matching Dell proprietary ISA riser included; these are hard to source separately.
- External battery pack included, and the board shows no battery corrosion.
- No system password set, so the board is not locked out.
- Full onboard I/O present: VGA (WD90C30-LR), 2 serial, parallel, PS/2 keyboard and mouse.
- IDE and diskette headers.
- All large ICs present, none desoldered or socket-robbed.
| Parameter | Value |
| MPN | 486P |
| Brand | Dell Computer Corporation |
| Model | System 486P system board |
| Form factor | LPX, board approximately 13.7 x 7.3 in (349 x 185 mm) |
| Processor installed | Intel i486SX-20, 20 MHz, 8 KB internal cache |
| Family processor options | i486SX-16/-20/-25, i487SX, i486DX-33, IntelDX2-50 and -66, IntelDX4 OverDrive |
| Memory reported by BIOS | 4096 KB total |
| Memory sockets | 4, 36-bit 72-pin SIMM, 1 MB, 4 MB and 16 MB modules, 64 MB maximum |
| Memory architecture | page mode 4-way interleaved, 80 ns tRAC, 20 ns tCAC |
| Video | Western Digital WD90C30-LR onboard, 512 KB standard, upgradable to 1 MB, 1024 x 768 at 512 KB, 1280 x 1024 at 1 MB |
| Chipset | VLSI VL82C330, VL82C331, VL82C332, VL82C106 with ACC Micro 3201 |
| BIOS version | A07 |
| Expansion | 3 ISA 16-bit slots on the included Dell riser card |
| Bus | 8 MHz I/O bus, 16-bit data width, 7 DMA channels, 15 interrupt levels |
| Serial UART | 16450 |
| External ports | PS/2 keyboard 6-pin mini-DIN, PS/2 mouse 6-pin mini-DIN, VGA DB-15, two serial DB-9, one parallel DB-25 |
| Internal headers | IDE 40-pin, diskette 34-pin, 26-pin video feature connector |
| Power input | AT style 6-pin P8 plus 6-pin P9 |
| Backup battery specified by Dell | Rayovac 844, 4.5 V alkaline |
| Quantity | 1 |
Dell System 486P system board with i486SX-20 and heatsink installed
One 72-pin SIMM installed in socket S1
Dell 3-slot 16-bit ISA riser card
External battery pack module on a two wire lead
Not included:
Chassis, cover, power supply, drive bays and mounting hardware
Diskette drive, hard drive, drive cables and I/O cables
Keyboard, mouse, monitor, power cord
Expansion cards, math coprocessor, video RAM upgrade
Software, diskettes, documentation
Requires an AT style power supply with P8 and P9 connectors. The riser card is proprietary
to the Dell LPX chassis, and expansion cards install horizontally into the riser. The board
is drilled for a Dell low profile chassis, so a standard AT or ATX case will not line up
without custom standoffs. Memory must be 36-bit 72-pin SIMMs of 1 MB, 4 MB or 16 MB;
30-pin SIMMs and 32-bit parity-free modules are not supported. The diskette header supports
two diskette drives, or one diskette drive and one tape drive. The system supports one
internal hard disk drive. Video output is the onboard VGA DB-15.
Where possible, electronics are tested. The value of an item determines the effort put into testing; items not specifically tested in detail are visually inspected and reviewed for operational status. Any exceptional wear is noted in the description. Most items are covered by a money-back guarantee.
Box 15 x 15 x 7 in, ship weight 4 lb. Ships double boxed, board bagged in antistatic and
suspended in foam, riser packed separately. Ships from Sylmar, California.
Orders may take up to 3 business days to ship from payment; weekends are not counted. If you need faster service, contact us before ordering so we can adjust priorities. We reserve the right to change the selected shipping method to an equivalent or better service that fits the item.
We ship worldwide. USPS may not be an acceptable choice for international shipping due to size, weight, and export documentation restrictions; you may be asked to select FedEx, UPS, or DHL at a higher price. Confirm your shipping choice with us before ordering if in doubt.
International shipments may be delayed or cancelled due to EAR and ITAR export compliance requirements. The vast majority of our items need no export license and ship under EAR99 and other exemptions; items that require a license are indicated in the listing.
This listing carries a 60 day money back guarantee: return your purchase for any reason within 60 days for a full refund or exchange. Returned items must be in the condition received and in the original packaging.
All items are guaranteed to be as described. Any item not as described can be returned at our expense for a full refund, regardless of any as-is marking.
If you are dissatisfied for any reason, contact us first and give us a chance to work things out; if we cannot fix it, you receive 100% of your purchase price back.
We do not keep or share your information anywhere. Your information resides only on eBay and is available to us only for a limited time while we interact with you on an inquiry, order, or return, per eBay usage policies.
Additional information
| Weight | 4.0000 lbs |
|---|---|
| Dimensions | 15 × 15 × 7 in |
| Brand | |
| TYPE | Motherboard |
| MPN | |
| VINTAGE | Yes |
| Condition Description |
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