[Coco] CoCo 3 Projector 3 Blues: The program only gives errorsto drive numbers higher than 1 (reposted because ofpossible size violation of previous message)
operator at coco3.com
Sun Jan 17 16:31:59 EST 2010
At 09:26 PM 1/16/2010, you wrote:
>Robert Gault wrote:
>>>the Run"boot" method but is OK I've fixed it now with the added
>>>code,still the program does give you a save feature but does it save the
>>>files in a format that can then be read in a standard fashion from Disk
>>>Basic? It has been a while since I've done any programming on the CoCo
>>>Emulated or not so if it does can you or someone provide the listing of
>>>the program needed to load a "standard" picture file into memory?
>>Projector-3 is a perfect example of a program that can load a
>>"standard" picture into memory. There is no standard format for
>>Coco images although many users have created their own. Then there
>>are graphic programs such as The RAT and CocoMax-III which have
>>their own Coco image formats.
>>Perhaps what you mean is a Coco program to dump either a PMODE or
>>HSCREEN to disk along with the palette colors. Well the OS-9 vef
>>format is the same as an HSCREEN and I think Projector-3 will save
>>files in the vef format. In fact, given a vef file in NTSC artifact
>>format, Projector-3 should display it just fine.
>I can confirm that P-3 does display these 256-color VEF
>pictures. Of course, these are simply 640x200 4-color pictures in
>disguise. When I get a little more time, I'll upload the pics from
>my slideshow in DECB disk images for those who want to view them in
>Now what would be cool (and probably what Roger had in mind) would
>be a module for P-3 that would take an 8-bit .GIF or .BMP picture,
>scale it to 160x200, and render it to the screen in 256 artifact
>colors. This would be significantly more complicated than just
>displaying a picture that has already been converted but should
>certainly be possible. In addition to scaling the image, it would
>have to remap the original image's palette to the nearest colors in
>the CoCo's fixed palette of artifact colors -- probably from a
>look-up table. I guess the existing dithering options could be
>used, though I'm not entirely clear how that would work with artifact colors...
Exactly. Check out the source code files I attached earlier or load
up the P-3 project in the Rainbow IDE and see how easy it can be to
do stuff like this.
For these artifacted ~256 color pictures, you would simply turn off
dithering in P-3 when loading the pics.
~ Roger Taylor
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