[Coco] HDB-DOS and double sided drives

[Walter Zambotti]

So what values did you end up patching to the drive select masks in order to make it work?

Walter

-----Original Message-----
From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of David Ladd
Sent: Friday, 3 April 2020 10:29 PM
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Subject: Re: [Coco] HDB-DOS and double sided drives

Henry,

Yes you can get access to the back side of the double sided floppy disk from HDBDOS if you modify the table that holds the bit patters for the drive select lines.

https://colorcomputerarchive.com/files/Documents/Books/Unravelled%20Series/disk-basic-unravelled.pdf
PDF Page # 70
Table label is:
LD89D
The address start is at $D89D

This also works with CoCoSDC-DOS as well. :D I use it often on the SDC :P on double sided disk images LOL

Sincerely,
Dave
***END OF LINE***
+-----------------------------------------------------------------------+
| David Ladd a.k.a. PacoOtaktay a.k.a. Drencor                          |
| YouTube: http://www.youtube.com/user/PacoOtaktay                      |
| YouTube Gaming Live: https://gaming.youtube.com/user/PacoOtaktay/live |
| Websites are:                                                         |
|   http://daves-hobbies.com                                            |
|   http://dwladd.com                                                   |
|   http://www.theterrorzone.com                                        |
|                                                                       |
| Do you have your CoCo 3 yet?                                          |
+-----------------------------------------------------------------------+




On Thu, Apr 2, 2020 at 12:01 PM rietveld rietveld <rietveldh at hotmail.com>
wrote:

> Is it possible to use double sided drives with HDB-DOS outside of OS9?
>  More specifically HDB-DOS DW CC1
>
> --
> 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