Re: Tweaking DOS.SYSTEM from Extra-K to support other DOS 3.3 variants

[Moll <MollyBaker@Spam.GMAIL.Spam.Spam.Spam.Com>]

RedskullDC wrote:
> No probs,
> Found it on 'Ground'.

I knew it was out there somewhere. XD

> Here is a link to a zip file with the corrected versions:
> http://au.geocities.com/redskulldc/dos.system.zip
> includes a pre-built hybrid disk with a pronto.system.

And it works! XD

> This is what I did:
> Fire up applewin (I have the J version, but the latest is fine)
> Put a blank pronto-dos image in drive #1
> Go into the debugger
> Set a breakpoint at $B747. this is normally the last instruction
> before DOS3.3 is started. (True for DOS and Pronto-DOS, may
> vary for some of the others, but it will be nearby).
> Normally contains a JMP $9D84 instruction.
> Hit G in the debugger to continue executing.
> Boot the disk with PR#6
> You may get a couple of breakpoint hits at $C6C6,$C6DC,$C6E6
> ignore these by hitting G <ret> in the debugger.
> When the 6502 gets to B747, change the PC register with:
> R PC FF59<ret>
> G <ret>
> this will dump you in the monitor, with your chosen DOS fully loaded.
> Move it out of the way with *5D00<9D00.BFFFM<ret>
> continue executing DOS with:  *9D84G<ret>
> save your dos image with ]BSAVE image,A$5D00,L$2300
>
> From there I ran the new image through your program to create
> the pronto-system file, copied the files to the hybrid disk, and
> bob's your uncle.
>
> Cheers,
> Red 

Pity it doesn't seem to work with ZDOS, but I did get it to work with 
ESDOS ][.

Thanks!

Moll.