CONFIG_SCSI_IZIP_SLOW_CTR: ppa/imm option - Assume slow parport control register

General informations

The Linux kernel configuration item CONFIG_SCSI_IZIP_SLOW_CTR:

• prompt: ppa/imm option - Assume slow parport control register
• type: bool
• depends on: CONFIG_SCSI_PPA || CONFIG_SCSI_IMM
• defined in drivers/scsi/Kconfig
• found in Linux kernels: 2.5.45–2.5.75, 2.6.0–2.6.39, 3.0–3.19, 4.0–4.20, 5.0–5.19, 6.0–6.11, 6.12-rc+HEAD

Help text

Some parallel ports are known to have excessive delays between changing the parallel port control register and good data being available on the parallel port data/status register. This option forces a small delay (1.0 usec to be exact) after changing the control register to let things settle out. Enabling this option may result in a big drop in performance but some very old parallel ports (found in 386 vintage machines) will not work properly.

Generally, saying N is fine.

Hardware

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This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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