[Coco] Preliminary Support for SDC in HDBDOS

Tue Nov 25 15:00:52 EST 2014

With a little work it would work. SECB is copied to RAM. Whenever it should
access the upper 8K, it must toggle the ROM. Any function jumping or
calling an upper bank, should do it first and then return to RAM.

Luis Felipe Antoniosi

On Tue, Nov 25, 2014 at 2:13 PM, Bill Pierce via Coco <coco at maltedmedia.com>
wrote:

>
> Kip, as it has been discussed before, a 16k rom would not work wit the
> Coco 3, only Coco 2.
> In the Coco 3, it would overwrite SECB. It would probably take a total
> rewrite of Basic to use a 16k rom there.
>
>
> Bill Pierce
> "Today is a good day... I woke up" - Ritchie Havens
>
>
> My Music from the Tandy/Radio Shack Color Computer 2 & 3
> https://sites.google.com/site/dabarnstudio/
> Co-Webmaster of The TRS-80 Color Computer Archive
> http://www.colorcomputerarchive.com/
> Co-Contributor, Co-Editor for CocoPedia
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>
>
>
> -----Original Message-----
> From: Kip Koon <computerdoc at sc.rr.com>
> To: 'CoCoList for Color Computer Enthusiasts' <coco at maltedmedia.com>
> Sent: Tue, Nov 25, 2014 9:11 am
> Subject: Re: [Coco] Preliminary Support for SDC in HDBDOS
>
>
> Hi Brett,
> Maybe there could be an 8K and 16K versions.  I for one have no problems
> whatsoever have a 16K HDBDOS rom image running on my system.  The extra
> space
> would enable it to have all the drivers and features in one giant image,
> would
> it not?
>
> Kip Koon
> computerdoc at sc.rr.com
> http://www.cocopedia.com/wiki/index.php/Kip_Koon
>
>
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Brett Gordon
> Sent: Monday, November 24, 2014 12:33 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Preliminary Support for SDC in HDBDOS
>
> Right now, it assumes a max sized partition, 256 disk.  I have to add one
> more
> method to flesh out the HDB Driver.  I would like some people to test the
> ROM
> out before plopping it by default onto the SDC image.
> If  you try it let me know how it turns out.
>
> I don't think I can fit all the fancy stuff, like Darren's SDCDOS into
> 8K.  And
> I'm pretty sure Boisy and Mark expressed concerns about HDB spreading out
> into a
> 16k image. So the fancy stuff my have to stay on a utility disk.
>
> On Mon, Nov 24, 2014 at 12:02 PM, Zippster <zippster278 at gmail.com> wrote:
> > That sounds great.  When you get it finalized I can include it in one
> > of the selectable ROM banks as an optional DOS (for future shipments
> > of SDC’s), since there are 6 banks open.
> >
> > - Ed
> >
> >
> >> On Nov 24, 2014, at 8:09 AM, Brett Gordon <beretta42 at gmail.com> wrote:
> >>
> >> This weekend I was able to hack in some preliminary support for
> >> CoCoSDC into HDBDOS.   This will allow you to treat a SDC mounted hard
> >> drive image in the same manner as the other devices (IDE,SCSI,DW,
> >> etc...)
> >>
> >> I have replaced the only the low-level DSKCON drivers, so HDB can
> >> access the two logical drives. However, HDBDOS cannot do all the
> >> fancy stuff (yet) - mount disk images, list the SD directory.  In
> >> other words, you will probably have to have a config.ini on your SD
> >> card to make SDC auto-mount images.
> >>
> >> I have shared three files here:
> http://sites.google.com/site/cocoboot2/down
> >>
> >> hdbsdccc3.dsk :  cocoboot disk that autoloads the new HDB (coco3)
> >> hdbsdccc2.dsk:   save as above for the CoCo2
> >> hdbsdc.rom:        a new ROM image (set for partition offset 0x000000 )
> >>
> >> There's two ways to try it:
> >>
> >> 1. Burn (flash) the ROM to your device, and boot.  The same directory
> >> has a SDC flashing utility.
> >>
> >> 2. Use the above cocoboot disk to use HDBSDC in RAM.  If the cocoboot
> >> disk fail to boot properly, its probably because you have an MPI, or
> >> a strange configuration.. no worries: CoCoBoot contains a menu-driven
> >> setup program to help you tailor the boot to different setups. (Yes,
> >> it can change your HDB partition offset)
> >>
> >> This is all experimental (but tested).  Shortly, I'll ask for a code
> >> review of my changes to HDBDOS, and maybe they will get pushed to the
> >> repo.
> >>
> >> If you need any help, email me.
> >>
> >> --
> >> Brett M. Gordon,
> >> beretta42 at gmail.com
> >>
> >> --
> >> Coco mailing list
> >> Coco at maltedmedia.com
> >> https://pairlist5.pair.net/mailman/listinfo/coco
> >
> >
> > --
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>
>
>
> --
> Brett M. Gordon,
> beretta42 at gmail.com
>
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