Catweasel Mk1-3 not suitable for archiving - why?
cclist at sydex.com
Sun Sep 16 15:31:34 CDT 2007
On 16 Sep 2007 at 21:20, Antonio Carlini wrote:
> Philip Pemberton wrote:
> > Looks like I'll mark this up as an unsourced statement - I can't find
> > anyone other than SPS calling the Catweasel unsuitable for archiving,
> > nor can I find any reason why it's so important to use an Amiga drive
> > and controller (except maybe the old scientific rule of 'keep
> > variables to a minimum').
The MK3 (and MK4) departed from earlier versions by putting the code
into protected mode Windows 2K/XP and Linux. As both are multi-
tasking OS-es, precision of timing isn't guaranteed--nor is the
ability to disable interrupts for relatively long periods of time.
However, in good old MS-DOS, even the MK 1 can handle tasks such as
hard-sector writing--it's just a matter of software (stall until you
see the index status go true). For precision in timing, I read the
8254 timers directly. If you care about time of day ticks being
preserved, enable the timer interrupt and use your own very short ISR
to count timer ticks.
MS-DOS is still great for a lot of things.
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