Re: atari 800xl emulator

"Russg" <russgilb@xxxxxxxxxxxxxxxxxx>:

<?> wrote in message news:
Not strictly accurate; it is possible (not easily) to peek in
page zero for program pointers and dump a block of
memory to a group of sectors with the resident disk
handler so you can reboot with DOS, reload the memory,
reset the pointers and then save it to a DOS file. I did it
years ago and it was a royal pain.

Jess
I don't see that. Even if you use SIO calls from assembler code done in
BASIC USR calls, you still don't have the D: handler to save it to a DOS
file. You're really way out here, not doubting you, the OP asked for a
simple answer. Where'd you get the DOS.SYS to dump to sectors on a disk?
Are you suggesting the sector dumps of OMNIMON? I'm sure you did it, but it
would take a lot more description of how to answer the question.

Russg,

SIO is part of the ROM, so you can always write sectors to and from a disk
drive, even without a DOS. Of course, you need to be programming (poking
and peeking) at an assembly level basically, to do so. DOS.SYS just loads
the parts that understand files and the DOS file structures.

--
Shawn Jefferson
http://www.jeffersonsauctioneering.com/atari/
(fix reply to for email)
.

Relevant Pages

  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)
  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)
  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)
  • Re: atari 800xl emulator
    ... reset the pointers and then save it to a DOS file. ... you still don't have the D: handler to save it to a DOS ... Where'd you get the DOS.SYS to dump to sectors on a disk? ...
    (comp.sys.atari.8bit)
  • Re: how to deal with bad disk blocks?
    ... DOS had marked sectors as bad on this disk previously. ... utility for linux that will do this. ...
    (linux.redhat.install)