[Coco] hardware scrolling

[Simon Jonassen]

I have a PAL version......

By thorsten dittel.....

/Simon :-) 

-----Oprindelig meddelelse-----
Fra: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] På
vegne af Luis Antoniosi (CoCoDemus)
Sendt: 2. december 2013 18:52
Til: CoCoList for Color Computer Enthusiasts
Emne: Re: [Coco] hardware scrolling

Dragon Fire makes use of 8 colors on hi-res and it's pretty impressive. But
it fails on PAL machines and coco3... How could it get to stores ?

On Sun, Dec 1, 2013 at 11:12 PM, Steve Bjork <6809er at srbsoftware.com> wrote:
> On 12/1/2013 2:35 AM, Simon Jonassen wrote:
>>
>> Hey Steve !
>>
>> I hear what your saying...
>>
>> If i see a "glitch" on the screen when i play with the vdg/sam, i'm 
>> at it like a dog with a bone until i get it to work ! - in the 80's i 
>> programmed demos etc for the c64....
>>
>> But at the same time, alot of people might not have seen all these 
>> tricks that you are saying have been lost to the eons of time....
>>
>> So my re-inventing the wheel and making the sourcecode for it freely 
>> available might help these tricks survive !
>>
>> Another thing, why was the "DMA" mode such a big no no ???????? - 
>> it's in there and it can be exploited.....
>
> It was simple that the undocumented modes may not always be there in 
> future versions CoCo.
>
> The future was key word for CoCo programmers.  The games that I would 
> start work on Today may not hit the stores for almost a year.
>
> To get a game in to the next Catalog that hit the stores in August, 
> the final version would need to be in Tandy's hands no later than 
> April.  Most games where contracted by December for next year's Holiday
season.
>
> With these types of lead times, you always had to be watchful of the 
> changes in the future.
>
> Add in the fact that there was always a new model of the CoCo on the 
> drawing boards.  So, undocumented modes could be gone by the time your 
> software hit the stores.  That's not good for sells!
>
> Steve
>
>
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