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Re: DOS/ProDOS Image Question

Subject: Re: DOS/ProDOS Image Question
From: Doug Kwan <NOSPAMdkwan@gauge.transmeta.com>
Date: Tue, 25 Feb 2003 00:02:16 GMT
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Bryan Parkoff <BParkoff@satx.rr.com> wrote:
:     All images' extension DSK and PO are RAW data for all emulators.  Do all
: emulators read all images into memory BEFORE they are prenibbled into 342
: bytes as 6-2 encoded?  By the way, all emulators can access to C600 routines
: and then postnibbled into 256 bytes as 8-0 decoded.  Is it correct?

I cannot speak for all emulators but YAE does what you described.
I wrote routine in C that nibblize the current track (4K bytes) into GCR
encoded form and put it into a internal buffer in RAM. The emulated
disk I/O is done using raw nibbles.

The C routines are basically C translation of their 6502
assembly counterparts in RWTS.

-Doug

References:
- DOS/ProDOS Image Question
  - From: "Bryan Parkoff" <BParkoff@satx.rr.com>

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