[Coco] Booting Nitros9 from the VCCemudisk.vhd on a Real CoCo III

[Arthur Flexser]

Well, as far as getting rid of the necessity to poke those values in....

You could always modify your HDBDOS boot floppy to embed the 3 values you
want within the relevant binary file, so they are there from the outset, if
those are values you want to be using each time you boot up.  I imagine
somebody here could tell you how to do that, if it isn't obvious.

Art

On Wed, Jan 16, 2019 at 11:37 PM Walter Zambotti <zambotti at iinet.net.au>
wrote:

> Thought I'd note the process of how I got my CoCo III to boot Nitros9 on a
> real CoCo III
>
>
>
> Equipment:
>
>
>
> CoCo III (512K)
>
> 1 x FD Controller & drive (not required)
>
> 1 x MPI (not required)
>
> 1 x HDB-DOS (mine is in a miniFLASH) (OS9 Offset $000000)
>
> 1 x DriveWire 4 server (+ serial cable)
>
> 1 x VCCemudisk.vhd
>
> 1 x 630 sector virtual floppy on DW server (NOS9_BOOT.OS9) cleanly
> formatted
> for OS9
>
> 1 x Nitros9 DW boot floppy (
> <https://nitros9.sourceforge.io/snapshot/NOS9_6809_L2_v030300_coco3_dw.dsk
> >
> NOS9_6809_L2_v030300_coco3_dw.dsk)
>
>
>
> Procedure
>
>
>
> Mount NOS9_6809_L2_v030300_coco3_dw.dsk in DW device 0
>
> Mount VCCemudisk.vhd in DW device 1
>
> Mount VCCemudisk.vhd (with offset 529290, size 630) in DW device 2 (HDBDOS
> boot floppy)
>
> Mount NOS9_BOOT.OS9 in DW device 3
>
>
>
> Boot CoCo III to Nitros9. (DOS)
>
> If the NOS9_BOOT.OS9 is not formatted then format it:
>
> format /x3 "NOS9 Boot" '35'
>
> OS9GEN the new boot floppy:
>
> os9gen /x3
>
> /dd/OS9Boot
>
>
>
> Copy the contents of the HDBDOS boot floppy to the new boot floppy:
>
> Chd /x3
>
> Dsave /x2 | shell (this will skip the OS9Boot file)
>
>
>
> Backup the new floppy to the HDBDOS floppy:
>
> Chd /dd
>
> Backup /x3 /x2 #32k
>
>
>
> Restart the CoCo
>
> Dismount all the devices in the DriveWire server
>
> Remount VCCemudisk.vhd in DW device 0
>
>
>
> Point HDB-DOS at floppy 0 of VCCemudisk.vhd:
>
> Poke &HD938,&H05
>
> Poke &HD939,&HA0
>
> Poke &hD93A,0 ! shouldn't be necessary
>
>
>
> Dir should now see the autoexec/bas on the first HDBDOS floppy
>
>
>
> Boot away:
>
>
>
> DOS
>
>
>
> The EMUdisk quick select menu should popup and from there you can select
> the
> option to boot to OS9.
>
>
>
> It was really nice after all these years to see my CoCo III boot up to the
> same software that I have been
> using for years on VCC!
>
>
>
> It would be nice if HDBDOS had a set offset command so I didn't need to
> poke!
>
>
>
> Walter
>
>
> --
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>