sklammer at gmail.com
Mon Jun 23 12:03:55 EDT 2008
I've actually got one of these along with a dual disk drive in my
collection... but without any disks (etc.) I haven't really done much with
it... much less the 6809 side...
It may take awhile before someone at TPUG gets back to you... although (as I
understand) they still meet regularly, I don't believe the numbers are still
there (they once were the world's largest)...
2008/6/23 Boisy G. Pitre <boisy at boisypitre.com>:
> You might find this link to be of interest:
> I've emailed the Toronto Pet User Group at info at tpug.ca to see if anyone
> has a copy of OS-9 for the SuperPet, but never got a response.
> Boisy G. Pitre
> Email: boisy at boisypitre.com
> Web: http://www.boisypitre.com
> On Jun 23, 2008, at 4:18 AM, Willard Goosey wrote:
> I was browsing through the library today and stumbled across a book
>> called "Introducing the SuperPET" or someting like that, so I picked
>> it up and looked through it.
>> Commodore's SuperPET is a dual processor machine, with a 6502 & a
>> 6809. The 6809 makes it at least vaguely on topic for this list. :-)
>> It has several interesting features.
>> First, it's dual processor is either/or. There's a hardware switch on
>> the front to select either 6502, 6809, or enable a software switch for
>> the two.
>> The memory map (which is the same for either processor) has 32K RAM
>> starting at 0x0000. Above that is video RAM, a 4K bank-switchable
>> page, I/O space, and ROM. There is an additional 64K RAM that can be
>> switched into the switchable page, in 4K blocks. There are also two
>> ROMs, and switching the processor automatically selects the proper ROM
>> and reboots the machine.
>> Disk drives are connected via IEEE-488. They are intelligent drives,
>> handling the filesystem themselves.
>> The 6502 ROM is Commodore BASIC. I read somewhere that the PET line
>> actually had Microsoft BASIC, but Commodore didn't fess up one way or
>> the other.
>> The 6809 ROM is more interesting. It's a BIOS for a Pascal system
>> developed at the University of Waterloo. From the description, it
>> sounds similar to the old P-code system, except that it compiles down
>> to 6809 binaries. It is implied that the Pascal system has to load
>> more code off a disk to be functional.
>> I was hoping the book would mention OS-9, but it didn't. :-(
>> Willard Goosey goosey at sdc.org
>> Socorro, New Mexico, USA
>> I search my heart and find Cimmeria, land of Darkness and the Night.
>> -- R.E. Howard
>> Coco mailing list
>> Coco at maltedmedia.com
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