Marc S. Ressl

Hello everyone:

this is very simple, could somebody please test the following code on
an Apple II? It is supposed to split-screen the display without
scrolling:

0300: A2 00 CA D0 FD A2 00 CA
0308: D0 FD A2 00 CA D0 FD A2
0310: 00 CA D0 FD A2 00 CA D0
0318: FD A2 00 CA D0 FD A2 00
0320: CA D0 FD AD 50 C0 A2 00
0328: CA D0 FD A2 00 CA D0 FD
0330: A2 00 CA D0 FD A2 00 CA
0338: D0 FD A2 00 CA D0 FD A2
0340: 00 CA D0 FD A2 49 CA D0
0348: FD AD 51 C0 4C 00 03 00

Thanks a lot!

Marc.-

Egan Ford

On 2/7/12 9:05 PM, Marc S. Ressl wrote:
> Hello everyone:
>
> this is very simple, could somebody please test the following code on
> an Apple II? It is supposed to split-screen the display without
> scrolling:
>
> 0300: A2 00 CA D0 FD A2 00 CA
> 0308: D0 FD A2 00 CA D0 FD A2
> 0310: 00 CA D0 FD A2 00 CA D0
> 0318: FD A2 00 CA D0 FD A2 00
> 0320: CA D0 FD AD 50 C0 A2 00
> 0328: CA D0 FD A2 00 CA D0 FD
> 0330: A2 00 CA D0 FD A2 00 CA
> 0338: D0 FD A2 00 CA D0 FD A2
> 0340: 00 CA D0 FD A2 49 CA D0
> 0348: FD AD 51 C0 4C 00 03 00
>
> Thanks a lot!
>
> Marc.-

Any Apple II (e.g. //e), or just a plain old II?

Bill Garber

"Marc S. Ressl" <mressl@gmail.com> wrote in message news:7b84
f58f-62b5-4b32-aeb7-147ab440884d@f30...oglegroups.com...
> Hello everyone:
>
> this is very simple, could somebody please test the following
> code on an Apple II? It is supposed to split-screen the display
> without scrolling:
>
> 0300: A2 00 CA D0 FD A2 00 CA
> 0308: D0 FD A2 00 CA D0 FD A2
> 0310: 00 CA D0 FD A2 00 CA D0
> 0318: FD A2 00 CA D0 FD A2 00
> 0320: CA D0 FD AD 50 C0 A2 00
> 0328: CA D0 FD A2 00 CA D0 FD
> 0330: A2 00 CA D0 FD A2 00 CA
> 0338: D0 FD A2 00 CA D0 FD A2
> 0340: 00 CA D0 FD A2 49 CA D0
> 0348: FD AD 51 C0 4C 00 03 00
>
> Thanks a lot!
>
> Marc.-

I can't even describe what it does on my IIgs ROM03
with CB card in slot#1. I need to set up my //e in
the next day or two, and I can try it there.

Bill

Vladimir Ivanov

Hey Marc,

On Tue, 7 Feb 2012, Marc S. Ressl wrote:

> Hello everyone:
>
> this is very simple, could somebody please test the following code on
> an Apple II? It is supposed to split-screen the display without
> scrolling:
>
> 0300: A2 00 CA D0 FD A2 00 CA
> 0308: D0 FD A2 00 CA D0 FD A2
> 0310: 00 CA D0 FD A2 00 CA D0
> 0318: FD A2 00 CA D0 FD A2 00
> 0320: CA D0 FD AD 50 C0 A2 00
> 0328: CA D0 FD A2 00 CA D0 FD
> 0330: A2 00 CA D0 FD A2 00 CA
> 0338: D0 FD A2 00 CA D0 FD A2
> 0340: 00 CA D0 FD A2 49 CA D0
> 0348: FD AD 51 C0 4C 00 03 00

NTSC - yes, it does provide stable split.

PAL/Euro - not nearby to test, but I bet it won't.


And of course, my corrigenda:

34C: A2 41 CA D0 FD 4C 00 03

Cheers,
-- Vlad

Marc S. Ressl

On 8 feb, 09:35, Vladimir Ivanov <vlad...@XXXyahooXXX.com> wrote:
> Hey Marc,
>
>
>
>
>
>
>
>
>
> On Tue, 7 Feb 2012, Marc S. Ressl wrote:
> > Hello everyone:
>
> > this is very simple, could somebody please test the following code on
> > an Apple II? It is supposed to split-screen the display without
> > scrolling:
>
> > 0300: A2 00 CA D0 FD A2 00 CA
> > 0308: D0 FD A2 00 CA D0 FD A2
> > 0310: 00 CA D0 FD A2 00 CA D0
> > 0318: FD A2 00 CA D0 FD A2 00
> > 0320: CA D0 FD AD 50 C0 A2 00
> > 0328: CA D0 FD A2 00 CA D0 FD
> > 0330: A2 00 CA D0 FD A2 00 CA
> > 0338: D0 FD A2 00 CA D0 FD A2
> > 0340: 00 CA D0 FD A2 49 CA D0
> > 0348: FD AD 51 C0 4C 00 03 00
>
> NTSC - yes, it does provide stable split.
>
> PAL/Euro - not nearby to test, but I bet it won't.
>
> And of course, my corrigenda:
>
> 34C: A2 41 CA D0 FD 4C 00 03
>
> Cheers,
> * *-- Vlad

Hi Vlad & everyone:

thanks for all your responses. Vladimir, do you mean it only splits
well on NTSC if you add that code at 34C?

With the best wishes,

Marc.-

Vladimir Ivanov

On Wed, 8 Feb 2012, Marc S. Ressl wrote:

> Vladimir, do you mean it only splits well on NTSC if you add that code
> at 34C?

No, no - it works as expected on NTSC.


The "corrigenda" (initially with smiley) is just added bit of fun.

Marc S. Ressl

On 8 feb, 11:49, Vladimir Ivanov <vlad...@XXXyahooXXX.com> wrote:
> On Wed, 8 Feb 2012, Marc S. Ressl wrote:
> > Vladimir, do you mean it only splits well on NTSC if you add that code
> > at 34C?
>
> No, no - it works as expected on NTSC.
>
> The "corrigenda" (initially with smiley) is just added bit of fun.

That's great, thanks a lot :-).

BLuRry

I haven't tested it on my //e, but I get an awful lot of flickering from JACE. The video renderer isn't perfectly cycle accurate yet, but it's close enough to where I shouldn't see a full screen flicker (which is what I got when I tested it.) By comparison, I can see the split screen on the money munchers intro with some flickering. If my timing is skewed (and it probably still is) I should have seen a split that was slowly traveling along thescreen.

-B

Marc S. Ressl

On Feb 8, 12:25*pm, BLuRry <brendan.rob...@gmail.com> wrote:
> I haven't tested it on my //e, but I get an awful lot of flickering from JACE. *The video renderer isn't perfectly cycle accurate yet, but it's close enough to where I shouldn't see a full screen flicker (which is what I got when I tested it.) *By comparison, I can see the split screen on the money munchers intro with some flickering. *If my timing is skewed (and it probably still is) I should have seen a split that was slowly traveling along the screen.
>
> -B

I'm glad this helps towards building better emuators :-).

Marc.-

Antoine Vignau

Hello There,
A point of view from a *real machine user and more and more emulator*
user.

We have now reached the level where original disks are modified to run
on an emulator. I think that is total nonsense, that should be the
other way round. I have in mind plenty of fast loader cracking disks
which all use some tricks to load well and fast.

Over the years, I have encountered some weird behaviour of some apps
either running well on emulators or on the real machines. See the
recent discussion above about the rainbow display.

I know, emulator programmers are doing a great job but are we going in
the right direction? I mean nowadays, why do emulators do not emulate
at a 100% accuracy rate, our beloved machines? Is that due to the way
the emulators were coded or a lack of knowledge of the real machines?
Or is that due to a lack of power of our modern machines? I do not
have the answer.

From my pirate perspective, does the low-level disk code emulate the
behaviour of the Logic State Sequencer or not?

I think Marc's modern approach of a modular and hardware-accurate
emulator will be the answer. I do not say, todays' emulators do not
behave well, the work done on those is really awesome. I just say the
path to a real emulated machine is still a few steps long.

Keep up the good work, Gentlemen! I am sure that one day, I will write
or crack software on an emulated machine only. For instance, Fishhead
was written within Sweet16 on my Macbookpro despite its horrible
keyboard.

Antoine.cycleaccuracy.isthekey