United States
Maintenance and Service Guide Compaq Presario 7300 Series Computers
| Product Description | Troubleshooting | Illustrated Parts Catalog
Home | Removal & Replacement | Jumper & Switch Information | Specifications
System
Power supply
Diskette drive
Hard drives
CD drives
Mouse
Fax/modem
> | SPECIFICATIONS System Specifications (continued) General system specifications Video memory System interrupts System I-O System memory System DMA
> System Memory
> Size | Memory Address | System Function
> 640 K | 00000000 - 0009FFFF | Base Memory
> 128 K | 000A0000 - 000BFFFF | Video RAM
> 32 K | 000C0000 - 000C7FFF | Video ROM
> 32 K | 000C8000 - 000CFFFF | Legacy USB Device Header (when legacy support enabled)
> 64 K | 000D000 - 000DFFFF | Unused
> 48 K | 000E0000 - 000EBFFF | Unused (Not available for option cards. May use for UMBs.)
> 16 K | 000EC000 - 000EFFFF | 16-bit cacheable, shadowable, read-only memory. Not available for option cards.
> 64 K | 000F0000 - 000FFFFF | System BIOS ROM shadow image
> 15 M | 00100000 - 00FFFFFF | Standard Extended Memory
> 64 M | 01000000 - 04FFFFFF | Rest of Extended Memory
> 60 M | 05000000 - 07FFFFFF | Unused
> 512 K | 08000000 - 0807FFFF | Standard Direct Video Memory
> 512 K | 08080000 - 080FFFFF | Optional Direct Video Memory
> 1919 M | 08100000 - 7FFFFFFF | Unused
> 16 M | 80000000 - 80FFFFFF | Memory mapped I/O devices
> ~2000 M | 81000000 - FDFDFFFF | Unused/System ROM aliases
> 128 K | FDFE0000 - FDFFFFFF | System ROM (alias)
> ~32 M | FE000000 - FFFDFFFF | Unused
> 128 K | FFFE0000 - FFFFFFFF | System BIOS ROM
> System DMA
> Hardware | System Function (Default) | Alternate Mappings
> DMA 0 | ECP Parallel | 1, 2, none
> DMA 1 | Entertainment Audio | 0, 3, none
> DMA 2 | Diskette Drive | none
> DMA 3 | Entertainment Audio | 0, 1, none
> DMA 4 | Internally used for cascading |
> DMA 5 | Available |
> DMA 6 | Available |
> DMA 7 | Available |
privacy and legal statement