[Coco] Dos ROMS.
gene.heskett at verizon.net
Sun Nov 19 20:10:12 EST 2006
On Sunday 19 November 2006 14:28, Mike Pepe wrote:
>Gene Heskett wrote:
>> Humm, that addressing seems to be slightly fubar. IIRC,
>> RS-DOS (Color Basic) lives at $8000-$9FFF.
>> Extended Color Basic lives at $A000-$BFFF I believe and
>> Disk Extended Basic lives at $C000-$DFFF. Only for the coco3 does
>> anything live at $E000 and above (that I know of anyway)
>Gene, not quite right
>Color BASIC starts at $A000
>Extended BASIC starts at $8000
>Disk BASIC starts at $C000, and there's a 'mirror' at $E000 due to the
>16k decoding of the CART output.
I was wrong, and wondered about that as I was typeing. Sorry.
>In fact there was a trick to get 8k more for color basic programs on a
>64k CoCo by copying the ROM to RAM and somehow switching off the
>Extended BASIC functions. I remember it appearing in Rainbow but I'm not
>sure if I ever used it for anything practical.
Yes, I used to do that, then copy Jake Commanders "Chrmakey" enhancment to
the $E000 range where it lived quite happily. That way I still had the
full 24k of ram for basic and one of the neatest code editors ever. Then
I discovered os9. The rest is history. And now historical I'm afraid.
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