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

[Bill Pierce]

Burn a rom with hdbdos set with the $5A000 offsets, put it in the fd502 and you eliminate setting the MPI all the time. HDBDOS is 99% compatible with DECB so you shouldn't have problems with real floppies.
Before my Cocos were flooded by Florence, I had my 1meg Coco3 setup as:

Coco III w/cooling fan
Disto 1meg Mem upgrade
Eagle AT Keyboard interface
MPI
    3. FD502 (no floppies connected, just using the rom)
    2. Glenside IDE (4x 1g partitions)
    1. Glenside MIDIPak
    0. Orch90 Pak
DW4 on bitbanger w/8 VHD slots (yes 8)

I'm hoping I can salvage this system as the whole system was underwater for 2 weeks along with 2 Coco 2s and a Coco 1 and a lot of various hardware (drives, joysticks etc).
 
 
 
-----Original Message-----
From: Arthur Flexser <flexser at fiu.edu>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Wed, Jan 16, 2019 11:55 pm
Subject: Re: [Coco] Booting Nitros9 from the VCCemudisk.vhd on a Real CoCo III

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
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>

-- 
Coco mailing list
Coco at maltedmedia.com
https://pairlist5.pair.net/mailman/listinfo/coco