[Coco] New version of SDC-DOS available

[Barry Nelson]

Yes, /sd0 and /sd1 are the sdc disk device descriptors, although you also need to modify /dd. The DAM for that disk is 36864 bytes so it fits. The disk size is 72Mb, or 294912 sectors, which I find sufficiently large.

> Allen Huffman alsplace at pobox.com  <mailto:coco%40maltedmedia.com?Subject=Re%3A%20%5BCoco%5D%20New%20version%20of%20SDC-DOS%20available&In-Reply-To=%3C65042DE5-CDDE-4F1D-92F2-41B38193C2D2%40pobox.com%3E>
> Fri Dec 2 19:21:32 EST 2016
> > On Dec 2, 2016, at 6:05 PM, Barry Nelson <barry.nelson at amobiledevice.com <https://pairlist5.pair.net/mailman/listinfo/coco>> wrote:
> > 
> > Actually I have had a great deal of luck using a shortcut/cheat. I edited the /sd0 and /sd1 devices to have the following geometry:
> > 
> > Sides = 1
> > Sectors per track = 18
> > Sectors on track 0 = 18
> > Tracks = 16384
> > 
> > Since it is 1 side and 18 sectors per track, cobbler and os9gen seem to work fairly well.
> 
> Refresh my memory … Are those the hard disk descriptors? If so, how big is your disk image?
> 
> The reason os9gen crashes is because it looks at the size of the Disk Allocation Map (DAM) and allocates RAM for a copy of it. The largest the DAM can be is $FFFF, and the utility tries to allocate that size + 256. Thus, >64K, and then it goes badly.
> 
> If the hard disk image were small enough (I suppose if the DAM were smaller than FF00?) it would probably work fine and that is a great approach.
> 
> 		— Allen