 Acer File Extensions |
Advent 450-D PC
| CPU | 486DLC2 50 |
| BIOS | Phoenix 128KB Flash EPROM A486 Ver 1.03, 10/04/93 |
| Memory | 4MB Simms upgradeable to 32MB using 72 pin simms at a speed of 80ns |
| Cache | Internal: 8KB, External: 256KB |
| Hard Drive | 170MB |
| CD Drive | Not Fitted |
| Sound Card | Not Fitted |
| Keyboard | Standard AT type keyboard |
| Mouse | PS/2 Style with PS/2 Port |
| Interfaces | 1x Keyboard port (PS/2 compatible) IRQ 1 1x Mouse port (PS/2 style) IRQ 12 2x Serial Ports 9 pin 1x Centronics Parallel Port IRQ 7 1x Video Port IRQ 9 |
| Expansion | 3 x 16 Bit AT Slots |
| Cache | Internal: 8KB, External: 256KB |
Motherboard Information
Cache
| Cache Size | Bank 1 | Tag | J28 | J30 | J32 | J33 |
|---|---|---|---|---|---|---|
| 0K | Empty | Empty | Off | Off | Off | Off |
| 64K | 8KB | 8KB | 1-2 | Off | Off | Off |
| 256K | 32KB | 32KB | 2-3 | On | On | On |
Memory
The Base memory can be configured in two ways. There are 4 Slots on the Motherboard for 72 pin simms.
1. With no fixed memory and one SIMM, the following memory configurations can be used -
FIXED - 0MB
SLOT1 - 1,2,4,8, OR 16MB 72 Pin, 80 ns Simm
SLOT2 - 1,2,4,8 OR 16MB 72 pin, 80ns Simm
The simms can be combined in any combination to give a total memory size of 2MB to 32MB.
2. With 4MB of fixed memory, for which the following memory combinations can be used -
FIXED - 4MB
SLOT1 - 1,2,4,8, OR 16MB 72 Pin, 80 ns Simm
SLOT2 - 1,2,4,8 OR 16MB 72 pin, 80ns Simm
The simms can be combined in any combination to give a total memory size of 4MB to 36MB.
Jumpers
J4 : Main Processor Configuration. Off - Enabled, On - Disabled
J11: Flash EPROM program configuration. 4-5 - Enabled, 3-4 - Disabled (5 pin EPROM fitted). On - Normal System Operation (2 pin EPROM fitted).
J22, J23: Processor Clock Selection. J22 On, J23 Off - 25MHz. J22 Off, J23 On - 33MHz.
J36: On Board Floppy Disk Drive Controller. Off - Enabled, On - Disabled.*
J37: On Board IDE Hard Disk Drive Controller. Off - Enabled, On - Disabled.*
*Some models have these jumpers removed. The floppy/hard disk configuration will be controlled by the Bios Setup program.
In the Box
Documentation Supplied
- PC DOS 6.1 Registration Card
- IBM Conditions of Use
- Proof of Entitlement for future upgrades
- Special Offers for PC DOS 6.1 Customers
- PC DOS 6.1 Keyboard and Code Pages
- PC DOS 6.1 Disc Compression Function Order Form
- PC DOS 6.1 User's Guide
- Advent User Guide
- Microsoft Windows User's Guide
- Getting Started with Microsoft Windows
Known Issues
Forgotten Password
Switch off machine, remove lithium CMOS battery and leave for 30mins. Replace battery and restart machine.
Can you upgrade to an alternative VLB Video card?
Yes. Simply unplug the on-board video card (it lies horizontally and just unclips and lifts off), and plug the new card into the VLB slot. No jumpers to reset, system automatically accesses the card.