Re: macADT and .dsk images over 140k

["William Garber" <willy46pa@garberstreet.com>]

<touchstone> wrote in message 2007120914155316807-@netnews.comcast.net">news:2007120914155316807-@netnews.comcast.net...
: On 2007-12-09 09:55:56 -0700, "William Garber"
: <willy46pa@garberstreet.com> said:
: >
: >
: >
: > You'll most likely find that they've all got attached header
: > or trailing bytes, or both. Otherwise the images are fine.
: > The same thing happens to images on my FTP site when folks
: > attempt to upload directly to download folders, rather than
: > to my specified upload folder.
: >
: > William Garber
: > Email Address - willy46pa@garberstreet.com
: > Alt. Email - willy46pa@comcast.net
: > Web address - http://www.garberstreet.com
:
: maybe you can shed some light at what i'm actually looking at and how
: images work in general.
:
: i an using text wrangler to get the hex dump of the images.
: it groups the resultant text into "pages" ideally from $00000000 to $00022f00
: with a break every 256 bytes.  so you see a chunk 16 bytes wide by 16
: bytes long,
: it's just like 'disk fixer' of old.
:
: for example, if i look at $00011b00 to $00011bff, is this the image of
: disk track $11 sector $b?
: and does adt put this on that track $11 sector $b verbatim?
:
: thanks,
:
: matthew


STOP! Use a hex editor that loads the entire
image linearly. Chances are as I described
previously. Bytes added as a header or as a
trailer or both. Remove them and resave the
image.

DOS 3.3 disks usually start with $01A5, and
ProDOS with $0138. Disks with their own RWTS
will start with something else, but can most
times be identified as the start of T0/S0.

If you have trouble ID'ing an image, then you
can email one to me and I'll fix and explain
it to you.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com