PB400/PB401T Video Memory Upgrade Information

Warning

Only authorized service personnel should upgrade the system. Anyone who wants to upgrade the system herself/himself should know about the dangers of ESD (Electro-Static Discharge) and the necessary precautions. Unknowingly zapping the components of the computer will void the warranty.

Video Memory

Note

The video DRAM sockets are 20-pin. DRAM ordered for memory upgrade need to be 20-pin. These are NOT proprietary DRAMs.

Video mode 59h (1024x768, 256 colors) is always interlaced.

    ╔════════╤═════════╤════════════════════╗
    ║ Total  │ Surface │ Sockets            ║
    ║ Memory │ Mount   │ U23 - U26          ║
    ╠════════╪═════════╪════════════════════╣
    ║ 512KB  │ 512KB   │ None               ║
    ╟────────┼─────────┼────────────────────╢
    ║ 1MB    │ 512KB   │ (4) 256K x 4, 70ns ║
    ╚════════╧═════════╧════════════════════╝