Vision QD6500

Vision QD6500 is VL-bus IDE controller, used by QDI company in 1993.
Features
  • one selectable IDE channel
  • PIO mode 3 without IORDY support

  • Used in: various controllers, e.g. QD6500A
    Manufacturer support: none.
    Documentation available: none.
    Drivers available: DOS, Win 3.1x

    Programming

    QD6500 has base address 0x30 or 0xB0 (jumper selectable).
     

    base + 0 - R/W timing register

    bit 0 to bit 2 - active time, count of VLB clocks
    000 = 8 clocks for ID3 = 0, 9 clocks for ID3 = 1
    111 = 1 clock for ID3 = 0, 2 clocks for ID3 = 1
    bit 3 - 1, R/O
    bit 4 to bit 7 - recovery time, count of VLB clocks
    0000 = 18 clocks for ID3 = 0, 15 clocks for ID3 = 1
    1111 = 3 clocks for ID3 = 0, 0 clocks for ID3 = 1

    Power-on-setting: 0x08 for ID3 = 0, 0x0C for ID3 = 1

    base + 1 - R/O - config register

    bit 0 - IDE controller base address: 0 = 0x170, 1 = 0x1F0
    bit 1 - QD chip base address: 0 = 0x30, 1 = 0xB0
    bit 2 - ID3, bus speed: 0 = >33 MHz  1 = <=33 MHz
    bit 3 - 0 = enabled, 1 = disabled
    upper nibble:  1100 is QD6500

    DOS Device drivers available:
    QD6500 v2.1
    QD6500 v2.31
    QD6500 v2.4



    updated 21-May-2000 by Petr Soucek