Re: mmu for 65c02

From: A. Fachat (
Date: 2005-04-21 22:02:43

Gábor Lénárt wrote:

>process ;-), but we can also declare, that using eg SID can be done only by
>one process at a time. Eg if we virtualize SID access via a file, like
>Sure, for slow systems it can be dangerous since the overhead of this
>'virtualization' (I mean, file operation should be done it should be processed
In OS/A65 I do not do the virtualization. Instead I defined - per 
platform - a set of semaphores that
control the access to hardware devices. If the semaphore is available, 
take it and access the device,
if not, you're out of luck...


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