[Coco] p-system was Re: LIF util for OS-9?

Steven Hirsch snhirsch at gmail.com
Fri Nov 4 16:54:30 EDT 2011

On Fri, 4 Nov 2011, Willard Goosey wrote:

> On Thu, Nov 03, 2011 at 09:57:49PM -0400, Steven Hirsch wrote:
>> Not on CoCo, but yes for Apple 2, Apple 3 and TI-99 (!).  Also have the
>> Pecan P-System for MS-DOS and Mac.  Oh, and the Lisa has a full P-System
>> available as part of the Pascal Workbench.
> If you get a free N hours, you should try moving a pcode module from
> OS-9 to one of those, or vice-versa, and let us know what happens.
> I do know that the OS-9 Pascal compiler sticks an empty OS-9 module on
> the begining of the pcode file as a header.  You'll have to split that
> off/add it on.

No promises, but I'll keep it in mind.

> My housemate has a TI-99.  Interesting but unfortunately crippled
> machine.  I'd heard that it had a P-system.  Does the Pcode engine run
> directly on the CPU or is it a GROM?

The P-Code engine is a plug-in card for the peripheral expansion unit 
(heavy metal chassis that hold diskette drive and some other things).

> You have a running Apple 3?  Wow, I'd be jealous, but then you might
> give it to me or something. ;-)

I have a clean working III, ///+ (very rare unit) and (2) Lisas. Also, 
1977 Apple ][ with Rev0 motherboard, ][+, 2e, yadda, yadda...  With the 
exception of an original 128k mac, I have at least one of everything they 
made through about 1989 or so.

> Does the P-System define a terminal type or is it just a dumb
> terminal?

Dumb teletype terminal.  I do not believe it natively supports cursor 
positioning, but that's just from memory so take it with a grain of salt.



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