Re: ALF 8088 co processor board

[pausch@saaf.se (Paul Schlyter)]

In article <9h522f$3d4$1@venus.itns.co.za>,
Stephen Shaw  <stephen@apple2.org.za> wrote:
 
> Could it be an ALF board? I think it is used for "emulating" PC
> software on the Apple II. I stand open to correction.
 
It didn't "emulate" the software: the ALF board had a real 8088
CPU chip to execute the code.
 
Also: an Apple II equipped with an ALF board was not PC compatible,
therefore it couldn't run "PC software" in general.  It could only
execute generic MS-DOS programs, i.e. programs which did all their
I/O through MS-DOS only, and not by directly accessing the BIOS or
the hardware.
 
Back then there were numerous other MS-DOS computers which weren't
PC compatible - a few years later they had vanished.
 
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