[Coco] Dragon & Drivewire

[Ken H.]

Aaron,
The Dragon's PA1 Tx line is internally inverted. Phill's Dragon parallel to
bitbanger adapter design includes a level shifter and an LS04 to invert the
signal again.
The hardware design could be simplified if it would be possible to have the
Drivewire server handle the inversion of the output signal coming from the
Dragon.

Do you think it would it be possible to add a "Dragon Tx Invert" option to
the Drivewire server code?


On Sat, Oct 13, 2012 at 1:27 PM, Aaron Wolfe <aawolfe at gmail.com> wrote:

>
>
> Nope.  All requests in DW use LSN, just linear sectors from 0 to
> whatever.  There is no concept of tracks, sides, etc.  Sorting that
> type of thing out is the responsibility of the CoCo side driver.  If
> there is a restriction to 35 track disks in DECB, that's something
> imposed by HDBDOS's DW driver.  Probably because of the multi-disk
> partition scheme they need to all be of identical size.
>
>