 Acer File Extensions |
Acer V12P Motherboard
Jumper and Connector Layout
Note - The blackened pin of a jumper represents pin 1.
The system board has the following major features:
- CPU: Pentium (P5) 60MHz or 66MHz
- System Clock: Keyboard switchable system clock
- RAM: Default 8MB expandable to 192MB. 6 SIMM sockets supports 4MB, 8MB, 16MB, 32MB 60NS & 70NS SIMMS.
- Cache: 16KB internal cache. 256KB 2nd level cache, not upgradeable.
- ROM: 128KB memory for system BIOS & SCSI BIOS
- Video: ATI 68800AX PCI accelerator adaptor or other PCI accelerators
- SCSI: Optional SCSI NCR 53C810 card to support 520MB, 1GB, & 524MB TAPE
- FDD: Supports 360KB, 720KB, 1.2MB, 1.44 MB FDD
- HDD: Embedded hard disk interface supports two IDE hard disks, NON-PCI BUS.
- On-board I/O: Two serial ports, one parallel port, PS/2 Keyboard/Mouse port
- RTC: System clock/calendar with 128 bytes CMOS RAM Seven year battery life
- Expansion slots: Five 16-bit ISA slots, three PCI local bus slots... One of Which is a Shared Slot.
- SPS: 200W, 115V/230V switchable power supply for ID3P & IDT 250W, 115V/230V switchable power supply for IDU
- BIOS: Acer system BIOS
Jumpers
| Title | Jumper | Setting | Function |
|---|---|---|---|
| PCI Interrupt B | JP2 | 1-2 | IRQ 15 |
| 2-3 | Disabled | ||
| 3-4 | IRQ 14 | ||
| PCI Interrupt C | JP3 | 1-2 | IRQ 11 |
| 2-3 | Disabled | ||
| 3-4 | IRQ 15 | ||
| PCI Interrupt D | JP4 | 1-2 | IRQ 10 |
| 2-3 | Disabled | ||
| 3-4 | IRQ 15 | ||
| Onboard Chipset | JP5 | CLOSED* | Enabled M5105 |
| OPEN | Disabled M5105 | ||
| Parallel Port | JP6 | CLOSED* | Bidirectional parallel port |
| OPEN | UNIdirectional parallel port | ||
| Second-level Cache | JP10 | 1-2* | 512-KB |
| 2-3 | 256-KB | ||
| JP12 | 1-2* | 512-KB | |
| 2-3 | 256-KB | ||
| Burst Cache | JP13 | CLOSED* | Burst SRAM cache |
| OPEN | Standard SRAM cache | ||
| System Security | JP11 | 1-2 | Password check |
| 2-3* | Password bypass | ||
| JP17 | CLOSED* | Keylock bypass | |
| OPEN | Keylock check | ||
| Parity Check | JP7, JP8 | 1-2, 1-2* | Disable parity check |
| 1-1, 2-2 | Enable parity check |
Note - 1-1 means to close pin 1 of JP7 and pin 1 of JP8. 2-2 means to close pin 2 of JP7 and pin 2 of JP8
Memory
The system comes standard with 8-MB memory. You can upgrade the system memory by adding memory modules (SIMMs) into the SIMM sockets or by changing the SIMMs for a higher memory configuration. The system supports single and double density SIMMs: 4MB, 8MB, 16Mb, 32MB. Both 60NS and 70NS Fast Page Mode SIMMS are OK to use.
The V12P supports both parity and non-parity SIMMs, HOWEVER, you must change a jumper to support either. The system originally shipped with non-parity SIMMs. Note - Pentium systems require SIMMs to be installed in pairs.
Cache
The V12P ships with 256k write-back second-level cache, and is not upgradable.