Basic hardware configuration

QIC-02 tape drive bootstrings

Use the ct driver bootstring to override the default tape configuration included on the SCO OpenServer tape cartridge distribution. It is intended for use during installation and does not replace the functions of the Hardware/Kernel Manager or mkdev tape described in ``Installing a tape drive''. If you later run the Hardware/Kernel Manager or mkdev tape to add a cartridge tape drive, you are prompted as to whether you wish to modify the current tape bootstring, retain it, or remove it entirely.

NOTE: The ct bootstring only applies to QIC-02 cartridge tape drives; it does not work for SCSI, QIC-40, or Irwin drives. SCSI bootstrings are described in ``SCSI peripheral bootstrings''.

The ct bootstring has the general format:

ct=controller(base,irq,dma)

where:

controller: is the brand name of the tape drive controller
base: is the base address of the controller
irq: is the controller's interrupt request number (IRQ)
dma: is the controller's DMA channel number

Numbers prefixed with 0x are assumed to be hexadecimal, other numbers are assumed to be decimal. You must also specify the kernel boot device. A complete boot line could look like this:

   Boot: hd(40)unix ct=wangtek(0x338,5,1)

When you invoke the tape bootstring manually, you must specify hd(40)unix or fd(64)unix, not just unix. The tape bootstring is not checked until the driver is initialized. If the configuration information supplied in the bootstring appears to be invalid (for example, the controller named in the bootstring is not supported), then a warning message is printed, and the tape driver ignores the bootstring and uses the default configuration.