[Coco] CoCo Demus

[Robert Gault]

Ed,

Let's assume that your ROM expects the Basic partition of the hard drive or .vhd to be 256 byte 
sectors. Since it very much looks like the drive image uses 512 byte sectors in the OS-9 partition, 
then we need to tell your ROM that the Basic partition starts twice as far into the disk than typical.
So instead of an offset of $79500 you should try $F2A00.

Robert

Tormod Volden wrote:
> On Sat, May 16, 2020 at 12:00 PM Tormod Volden wrote:
>> A file size of 336986112 (VHD header omitted) would with 512-byte
>
> Just ignore above mention of VHD header, I was thinking of JDK or VDK
> images. I understand this disk image is a plain sector dump without
> header, also since the 3 first bytes are then those of the NitrOS-9
> RBF partition LSN0, the "DD.TOT" value (numbers of sectors of this
> partition).
>
> Tormod
>