 Acer File Extensions |
Packard Bell 22/23 M/Board
Specification
- Battery : 3.6V DC Lithium (removable)
- BIOS : 128 KB - Phoenix BIOS V1.01.08
- Bus Architecture : ISA based system bus
- Cache : 8 KB Internal (Level 1) Cache Write Through External (Level 2)
- CPU : Intel 486 processor
- Interfaces :
- 1 DB-25 Parallel Port
- 2 DB-9 Serial port
- 1 PS/2 Keyboard Port
- 1 PS/2 mouse port
- 1 15-pin VGA
- RAM : 4 MB Standard on Motherboard 32 MB Maximum
- Speaker : Piezoelectric soldered on motherboard
- Video : Built in Oak Extended VGA
Jumpers
* Indicates default settings. For J27 the default setting depends on the original CPU configuration.
When Modem Port is Enabled (J11 JUMPED), it becomes COM1 and Serial Port 1 is disabled.
| Function | Jumper | Description |
|---|---|---|
| Modem Select (J11) | CLOSED OPEN | * Enabled Disabled |
| Mouse Select (J12) | CLOSED OPEN | * Enabled Disabled |
| VGA Select (J13) | 1-2 3-4 | * Enabled Disabled |
| Serial 1 Select (J14) | 1-2 2-3 | * COM1 COM3 |
| Serial 2 Select (J15) | 1-2 2-3 | * COM2 COM4 |
| Parallel Port (J16) | 1-2 2-3 | * LPT1 LPT2 |
| Parallel Port IRQ (J18) | 1-2 2-3 | * IRQ 7 IRQ 5 |
| Interlacing (J19) | CLOSED OPEN | * Interlaced Non-Interlaced |
| IDE Address (J20) | 1-2 2-3 | * Primary Secondary |
| FDD Address (J22) | 1-2 2-3 | * Primary Secondary |
| Speaker Select (J26) | 1-2 2-3 | * Onboard External |
| CPU Select (J27) | 486 486sx 487 | 486DX installed 486SX installed 487 installed |
| Speaker Select (J28) | NC C | * No Cache Cache Installed |
Upgrades
- Cache : The following cache modules are supported on this system :
- Intel Turbo Cache 485 MA (64K) (Available from Intel)
- Intel Turbo Cache 485 MB (128K) (Available from Intel)
- PB Cache (128K) (Available from Packard Bell)
- Maths Co-Processor : This system supports a math co-processor. It does not support upgrade processors (ODPs and OPDRs). The CPU frequency cannot be changed. WARNING! Do not insert a 20 or 25MHz processor into a 33MHz system. See jumpers section for necessary jumper changes.
- RAM : 32MB maximum. 256k/1MB/4MB 30 pin SIMMs, recommended speed is 80ns. No jumper changes necessary.
- Video Memory : This system has 512k video memory soldered (not upgradeable).