[Coco] OS9 vs RSDOS disks
Luis Antoniosi (CoCoDemus)
retrocanada76 at gmail.com
Thu Jun 13 22:26:09 EDT 2013
every MSX programmer knows that wrong bits to the register 7 of the PSG
could cause permanet damage to the chip. Later custom integrated chips (aka
MSX-Engine) solved this issue.
The same PSG is used in the coco's sound card/speech.
On Thu, Jun 13, 2013 at 10:16 PM, <billg999 at cs.uofs.edu> wrote:
> > Depending on you coco version, just type "dos". If it's an OS9 disk it
> > will
> > boot. otherwise, it won't or the disk is corrupted.
> Not all OS9 disks need to be bootable. I got software distributions
> (like the C compiler) on OS9 formated disks with no OS on them.
> > Another way is to "DIR" the thing an see what you get. After that, type
> > "dos".
> See above. :-)
> > Anyway, the only way you can hurt you computer is by striking it sharply
> > with a sledge hammer.
> People believed that at one time, but it is not necessarily true.
> I think the 6809 has an HCF instruction. I agree that there should
> be a way to look at the data on a disk and tell what kind of disk
> it is. But then, just telling the difference between OS9 and DECB
> is only useful if you know for a fact that you have no other format
> flopies laying around.
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> Coco at maltedmedia.com
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