[sebhc] IDE interface? - was RGT question for Pat Swayne

Jack Rubin jack.rubin at ameritech.net
Thu May 6 15:25:01 CDT 2004


Please tell us more - I'm sure there would be great interest in such a
project among the group. 

Both Pat and Dean Gibson (who is not a list member) have released their
code to us, though neither can supply source at this point. Hopefully,
Pat will be able to at some point in the future, but in the meanwhile,
if anyone has source or disassemblies of the HUG SY: driver or similar
material, please upload it to the archive!

I know that Ward Christiansen's RESOURCE disassembler was modified for
HDOS - anyone have a copy?


> -----Original Message-----
> From: sebhc at sebhc.org [mailto:sebhc at sebhc.org] On Behalf Of 
> West, Ronald S.
> Sent: Thursday, May 06, 2004 1:48 PM
> To: 'sebhc at sebhc.org'
> Subject: [sebhc] RGT question for Pat Swayne
> This is a question for Pat Swayne or anyone else who was 
> involved in HDOS software development.
> I am working on a device driver for an IDE port for the H8. I 
> think its the GRT (Group Reservation Table) that is written 
> to a floppy when it is initialized that essentially limits 
> the number of groups of sectors and thus files to 200. Does 
> anyone know if HDOS used multiple GRT's when a drive was 
> large (such as the H67 winchester disk)?
> Also, am I correct that HDOS itself appears to address 
> sectors individually using a two byte value. If that is the 
> case the system would be limited to 65,535 sectors. With 256 
> byte sectors the drive size could (theoretically) be 65,535 x 
> 256 = 16,776,960 bytes. With 512 byte sectors we should get 
> twice that amount. Pretty good, actually, at 32mb! 
> Thanks,
> Ron
> --
> Delivered by the SEBHC Mailing List

Delivered by the SEBHC Mailing List

More information about the Sebhc mailing list