 Previous Messages |
Posted By
Gaia
on 2003-09-18
|  Re: Hyper Sports Plus
Something like
LDA #$08
STA $FF07
totally screws up an NTSC machine while it's a common way of doing things on PAL. The desired method should be:
LDA $FF07
ORA #$08
STA $FF07
This is the way to fix most programs for NTSC, too. Well, also the sound and the eventual tape routines have to considered. You can easily detect an NTSC machine several ways:
- like the C64, using the rasterline counter (knowing NTSC never goes above ~261)
- checking the ROM since they are different
- reading bit #6 (chrystal clock divisor flag) of $FF07 (but that can be overwritten so it's not 100% safe)
Maybe Csabo can give you further hints, he has also experience! =)
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Posted By
MC
on 2003-09-18
 | Re: Hyper Sports Plus
And btw, how could i detect a SID card?
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Posted By
MC
on 2003-09-18
| Re: Hyper Sports Plus
How to check for NTSC? ff07 has 6th bit set?
I think i'll do that as i'm strongly a fond of software ergonomy. Seriously.
A more important question: how to make a demo NTSC-fixed? What's the difference from PAL?
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Posted By
JamesC
on 2003-09-17
| Re: Hyper Sports Plus
Csabo: Better than having a message "This program requires Microsoft Windows." 
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Posted By
MIK
on 2003-09-17
 | Re: Hyper Sports Plus
A touch of class to let the user know that the program won't run on their machine!
I'll try as soon as I can to test it on my beats of a C16
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Posted By
Csabo
on 2003-09-17
| Re: Hyper Sports Plus
Thank you for the kind words, good sir By the way, I squeezed it in as much as possible to aim for 32K size. This means that even a C16 with the 16K expansion should be able to run the game. I know you have one of those. Could you try it just to make sure?
Also, another little side note: the compressed program is small enough to load into a regular C16, but it would not work of course. Rather than crashing like most such games, I added an extra few bytes to check and make sure there is enough memory. If there isn't, the game refuses to run with an error message. By 2003's standards, such things are a MUST. You hear this, demoscene? If you make your demo PAL only for example (as 99% of them are) at least exit gracefully on an NTSC machine.
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Posted By
MIK
on 2003-09-17
| Hyper Sports Plus
Very nice work on Hyper Sports Csabo! Love that new version of the Hyper Sports logo you added. Great we get to see some events you could only dream of seeing or may never of seen thinking about it. The ESC feature rocks!!!
A very worthy update to a game that needed it!
Cheers!
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