 Acer File Extensions |
Packard Bell 400/401T M/Board
Specification
- Battery : 3.6V DC NiCad soldered on motherboard
- BIOS : 128 KB - Phoenix BIOS V1.01.08. Press Ctrl-Alt-S after post to access.
- Bus Architecture : ISA based system bus
- Cache : Write Back: 8 KB Internal (Level 1) Cache External (Level 2) 0 - 256 Kb
- CPU : Intel 486 processor
- Interfaces :
- 1 DB-25 Parallel Port
- 1 DB-9 Serial port
- 1 PS/2 Keyboard Port
- 1 PS/2 mouse port
- 1 15-pin VGA
- 1 15 pin Game (only with CL5424 Systems)
- RAM : 2 MB or 4 MB Standard on Motherboard 6 MB or 18 MB or 20 MB Maximum
- Speaker : Piezoelectric soldered on motherboard
- Video : Built in Oak Extended VGA
Jumpers
| Function | Jumper | Description |
|---|---|---|
| Battery (J8(Jbts)) | IN OUT | * Onboard Battery Enabled External Battery in Use |
| Onboard VGA (J10(Jvgas)) | 1-2 2-3 | * Enabled Disabled |
| Game Port (J12(Jgams)) | 2-3 1-2 | * Enabled Disabled |
| VESA Select (J14(Jvnde)) | IN OUT | * Normal VGA in use VESA Connector Enabled |
| Monitor Type (J16(Jvd)) | IN OUT | * Colour Monochrome |
| PS/2 Mouse Port (J17(Jmrq)) | IN OUT | * Enabled Disabled |
| Modem Port (J18(Jc13)) | 1-2 2-3 | * COM1 COM3 |
| Serial Port (J20(Jc24)) | 1-2 2-3 | * COM2 COM4 |
| LPT Port (J22(Jlpt)) | 1-2 2-3 | * LPT1 LPT2 |
| LPT IRQ (J23(Jlrq)) | 1-2 2-3 | * IRQ7 IRQ5 |
| IDE (J24(Jhdc)) | 1-2 2-3 | * IDE1 IDE2 |
| FDC (J26(Jfdc)) | 1-2 2-3 | * FDC1 FDC2 |
| Speaker (J29(Jspks)) | 1-2 2-3 | * Onboard Buzzer External Speaker |
| CPU Select (J31(Jcpup)) | IN OUT | Upgrade CPU Socket (U74) * Original CPU Socket (U73) |
| Fast CPU (J34(Jfcpu)) | IN OUT | 80486DX2/OVERDRIVE in use No Fast CPU |
| J101 (Jmod) | 1-2 2-3 | Enabled Disabled |
Note - J101 - Not present on all motherboards.
Note - J14 - Enable VESA connector J13 for PBTV to function.
CPU Type (J30(Jcpus))
| Processor | 1-2 | 3-4 | 5-6 | 7-8 | 9-10 |
|---|---|---|---|---|---|
| 80486sx PGA | OUT | IN | OUT | OUT | OUT |
| 80486sx PQFP | IN | IN | OUT | OUT | OUT |
| 80486DX 80486DX2 OVERDRIVE | IN | OUT | IN | IN | OUT |
| 80487sx | IN | OUT | IN | OUT | IN |
CPU Clock (J35(Jfreq))
| MHz | 1-2 | 3-4 |
|---|---|---|
| 16 | IN | IN |
| 20 | OUT | IN |
| 25 | IN | OUT |
| 33 | OUT | OUT |
Cache Size (J36(Jcach))
| Cache | 1-2 | 3-4 | 5-6 | 7-8 | 9-10 |
|---|---|---|---|---|---|
| 0 | OUT | OUT | OUT | OUT | OUT |
| 64 | OUT | OUT | OUT | OUT | OUT |
| 128 | IN | OUT | IN | IN | OUT |
| 256 | IN | IN | IN | OUT | IN |
- 0K - No CACHE Installed
- 64K - 8Kx8 in both banks
- 128K - 32Kx8 in even banks
- 256K - 32Kx8 in both banks
Upgrades
- Battery : This computer can use a 3.6 volt Lithium battery. To install the external battery, remove the cap on jumper J8. Then connect the battery to connector J7. The positive terminal of the battery connects to pin 1, and the ground terminal is connected to pin 4.
- Cache : Cache can be upgraded as follows (See jumpers section for more information) -
- 64K - 8Kx8 in both banks
- 128K - 32Kx8 in even banks
- 256K - 32Kx8 in both banks
- CPU : This system accepts the following processors (See jumpers section for more information)
- 486SX/20 PGA
- 486SX/20 PQFP
- 486SX/25 PGA
- 486SX/25 PQFP
- 486DX/33
- 486DX2/50
- 486DX2/66
- RAM : There are 3 different configurations of this motherboard -
- 2MB soldered DRAM and OPTi 82C495 System Controller - 256k or 1MB 30pin SIMMS up to a maximum of 6MB.
- 2MB soldered DRAM and OPTi 82C495B1 System Controller - 1MB or 4MB 30pin SIMMS up to a maximum of 18MB.
- 4MB soldered DRAM - 256k/1MB/4MB 30pin SIMMs up to a maximum of 20MB.
- Recommended speed (all versions) 80ns, though 70ns should work.
- Speaker : Use an 8 ohm, 1/2 watt computer speaker. Set jumper J29 to short pins 2 and 3. Then connect the speaker to J28, with the positive terminal of the speaker connected to pin 4, and the ground connected to pin 1.
- Video Memory : The video DRAM sockets are 20-pin. The memory can be upgraded to 1MB. DRAM ordered for memory upgrade need to be 20-pin, speed 70ns. These are NOT proprietary DRAMs. Video mode 59h (1024x768, 256 colors) is always interlaced.