Re: v9t9 & pc99

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Posted by Tursi on September 02, 1999 at 22:20:21:

In Reply to: Re: v9t9 & pc99 posted by Roger on August 30, 1999 at 00:27:40:

:Your right! the Ti files have a 128 header. The
:part I am talking about is that Texas
:Instruments set things up that all the files
:have a front that says [Ti File]. This

OOOOH! You're talking about the TIFILES header. That isn't a TI innovation, actually, it's a part of the TIXmodem implementation, so it doesn't apply to TI disk files. That isn't the problem. :)

:then you see the correct filename. I have a
:program that will convert v9t9 disks to pc99
:disks. Could this program be looked at and the
:process reversed? The pc99 disks had to have

Not unless it includes source code.. my reverse engineering skills aren't all that hot.

I was sure that Mike Wright kept saying the format for PC99 disk files was on the CADD web site, but I can't find it or any reference to it in the TI List archives at Mr Moon's site, so I guess I was dreaming. :/

The V9T9 disk format I need to get some more time - if I save a file in both formats and compare them I can figure out what I'm doing wrong. It may help a little, though it's not the point of the program. :)

:can be fractured and not necessarily in
:contiguous order in the Dos file, just as on a

Yeah, my program already takes this into account (or, at least, tries to. It's mostly successful, I'm *sure* I'm just reading a couple of extra bytes somewhere..)

:easier since I believe the v9t9 files would
:never be fractured, always intact. Whereas the

Note that I'm not talking about converting back and forth... I'm talking only about reading files from a disk image to a v9t9 compatible file.. so the v9t9 disk images suffer from fragmentation as much as the pc99 disk images do. But, again, since I'm trying to read the sector indexes, fragmentation isn't a problem. I only have limited documentation on how the real disks are built, though, the rest is from memory.

:is 260,240 bytes. I think I got the 6 bytes from
:the extra information on the grom

Yeah, that header I know about, and it stays as it's part of the file itself. :)

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