Messages in this thread | | | Date | Tue, 1 Jan 2008 21:13:22 +0000 | From | Alan Cox <> | Subject | Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. |
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> How do you find out the speed of the ISA bus? AFAIK there is no > standardized way to do that. On the Geode SC2200 the ISA bus speed is
It is per chipset magic registers. Fun fun fun
> usually the PCI clock divided by 4 giving 33MHz/4=8.3MHz or > 30/4=7.5MHz, but with no external ISA devices it's possible to > overclock the ISA bus to /3 to run it at 11MHz or so. But without
12MHz is valid for ISA although not a good idea - even IBM issued some systems with 12MHz ISA before discovering many vendors had assumed 8 was it.
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