[Coco] CoCo related question? (Better edit for coco3.rom)

[Albert Stinger]

Hi, I understand now why it's a invading utility.
It just won't work the way I had, when I said:

"I can't believe how EDITEX patched into the roms so nice.
It's like it was meant to be there. Take a look and see
how EDITEX uses up the unused portions in a coco3.rom."

Tried it and big crash. I tried another way and it was to
move EDIT into the $C405 memory and jump there from the
original address after doing some additional setup stuff.

You see my idea is to have EDITEX run entirely from ROM
and not depend on what's in the RAM when patched by
Super Extended Basic. Like I said I want it to be able
to do a regular EDIT commands on the current line number
and have cursor key movement and insert/overstrike at
current cursor location, but looks like it's not so simple.
It starting to look like a lot of work. I need to understand
how BASIC is working better before I'll succeed. I could
use someone with more knowledge to guide me some.

I am 49 yrs. I had a CoCo 3 since 1988, but lost it all
in 1995 when I got Windows 95.

Albert Stinger




<jdaggett at gate.net> wrote in message 
news:424183A2.27863.12C4ADB at localhost...
> Albert
>
> Not a lot. The Color basic Rom Code 1.2 from $A000 to $BFFF has
> about 10 bytes or so. The Extended Color Basic Rom is full and
> Super Extended basic Rom has 1012 bytes free from $FA0C to
> FDFF.  Finally DOS 1.1 ROM has 167 bytes free.
>
> Not really much room to do a screen type editor.
>
> Now if you map the 8K space from $C000 to $DFFF as internal rom
> and get rid of the author's picture you can recover about  7376
> bytes. Otherwise you have about 1172 bytes give take a few. Could
> be more depending on how much of the old DLOAD code is
> patched and what isleft of it can be overwritten with a patch.
>
>
> james
>
>
> On 23 Mar 2005 at 13:07, Albert Stinger wrote:
>
> To:             coco at maltedmedia.com
> From:           "Albert Stinger"
> <albertstinger24 at canada.com>
> Date sent:      Wed, 23 Mar 2005 13:07:44 -0500
> Subject:        [Coco] Re: CoCo related question? (Better
> edit for coco3.rom)
> Send reply to:  CoCoList for Color Computer Enthusiasts
> <coco at maltedmedia.com>
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>
>> More questions,
>>
>> Exactly how much rom space is available in the coco3 rom and
>> could be used to make a better edit command?  Where is this
>> rom space located in the rom image?  What would be the best
>> way to interface to the edit command so you could have full
>> screen editing with the cursor keys?
>>
>> "Albert Stinger" 
>> <albertstinger24 at canada.com>
>> wrote in message news:d1s26r$ipo$1 at sea.gmane.org...
>> > Is someone or anyone making a slightly better edit for the
>> > coco3.rom? Please! Full screen editing to go in the wasted rom space
>> > would be nice.
>> >
>> > Albert Stinger.
>> >
>> >
>> >
>> >
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>>
>>
>>
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