Vision QD6580

Vision QD6580 is VL-bus 2-channel IDE controller, used by QDI company in 1993 - 1994
Features
  • two IDE channels
  • PIO mode 3 and 4 with IORDY support
  • Read-Ahead FIFO
  • Post-Write Buffer


    • Used in: various controllers, e.g. QD6580, QD6580W/757, QD6580W/777, QD6580W/787
    Manufacturer support: none.
    Documentation available: none.
    Drivers available: DOS, Win 3.1x, WinNT 3.5, OS/2 2.1

    Programming

    QD6580 has base address 0x30 or 0xB0 (jumper selectable).

    base + 0 - R/W timing register for channel 0

    bit 0 to bit 3 - active time, count of VLB clocks
    0000 = 17 clocks 1111 = 2 clocks
    bit 4 to bit 7 - recovery time, count of VLB clocks
    0000 = 15 clocks 1101 = 2 clocks
    Power-on-setting: 0 for ID3=0, 0x0A 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 - 1
    upper nibble: 1010 or 0101 is QD6580

    base + 2 - R/W timing register for channel 1

    bit 0 to bit 3 - active time, count of VLB clocks
    0000 = 17 clocks 1111 = 2 clocks
    bit 4 to bit 7 - recovery time, count of VLB clocks
    0000 = 15 clocks 1101 = 2 clocks
    Power-on-setting: 0 for ID3=0, 0x0A for ID3=1

    base + 3 - R/W control register

    bit 0 - read - status of jumper JP5, no jumper = 1, jumper present = 0
    0 = Both Primary and Secondary IDE ports enable (channel 0 is hda and hdb, channel 1 is hdc and hdd)
    1 = Only Primary IDE port enable (channel 0 is hda, channel 1 is hdb)
    write - must be 1
    bit 1 - read - status of jumper JP1, no jumper = 1, jumper present = 0
    0 = for disk and/or non-disk (ATAPI) peripherals
    1 = for disk peripherals only
    write - must be 1
    bit 2 - read always 0, write - must be 1
    bit 3 - read always 0, write - must be 1
    bit 4 - read always 0, write - must be 1
    bit 5 - R/O - status of ??
    bit 6 - R/W - always set to 1 by DOS driver
    bit 7 - R/W - this bit is set to 1 for non-ATAPI devices, probably Read ahead and/or post-write control?

    DOS Device drivers available:
    QD6580 v3.4
    QD6580 v3.6 (with PIO4 support)
    QD6580 v3.7 (with PIO4 support)
     

    QD6580 DOS Driver 3.7 analysis


    updated 21-May-2000 by Petr Soucek