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Custom Display Lists with Quick


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I need some help fro anyone out there who knows Quick.

 

I have taken a page from XXL's book and am trying to port some simple spectrum games to A8. Unlike XXL, I am not using assembly, I will be using the Quick language. In theory, this should be straight forward, but I have already hit a snag.

 

I am trying to create a custom display list (actually, there will be 2 in the game, but one at a time here).

I 'think' it is creating the correct list, but when I try to poke a character to the screen, I get nothing.

I tried virtually the same in TurboBasic and I got a character on the screen. Could any one help?

 

I am posting the code to both the Quick and the TurboBasic versions so maybe someone could see something.

 

Quick Code

BYTE
[
 DMACTL=559
]
WORD
[
 SDLSTL=560
 MENUDLI
 MENUSCRN
]
* FRONT MENU DISPAY LIST
DATA($7000)
[
 112,112,112,71,232,148
 7,7,7,6,6,6,6,7,7,7,65,0,70
]
MAIN
 MENUDLI=$7000
 MENUSCRN=$94E8
 .FRONTMENU
ENDMAIN

* DISPLAY FRONT SCREEN
PROC FRONTMENU
LOCAL
WORD
[
 PKPOS
]
BEGIN
 DMACTL=0
 SDLSTL=MENUDLI
 DMACTL=34
 CLR($70,1)
 ADD(MENUSCRN,56,PKPOS)
 POKE(PKPOS,65)
ENDPROC

 

TurboBasic Code

1 DMACTL=559:SDLSTL=560:MENUDLI=28672
2 MENUSCRN=38123
3 HSBMENU=INT(MENUDLI/256)
4 LSBMENU=(MENUDLI-(HSBMENU*256))
10 FOR F=0 TO 18
20   READ A
30   POKE MENUDLI+F,A
40 NEXT F
100 POKE DMACTL,0
110 POKE SDLSTL,LSBMENU
120 POKE SDLSTL+1,HSBMENU
130 POKE DMACTL,34
150 POKE MENUSCRN,99
1000 DATA 112,112,112,71,232,148,7,7,7,6,6,6,6,7,7,7,65,0,70

 

Any help would be very greatly appreciated.

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Maybe try running it in Altirra with the debugger.

Put a line at the end so it endlessly loops or something.

 

Then you can use the debugger to check if stuff like SDLIST gets changed properly.

 

Or you could even single-step through the program. A method I use is to have a breakpoint set e.g. to writes at $E000. Then just put writes to $E000 inside your program where you want to start to trace.

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Thanks for the tip Rybags. I can't use Altirra though (I'm on a mac), but atari800MacX does have a decent monitor and debugger.

What I discovered is that the displaylist, which should be entered into memory with

 

 

DATA($7000)
[
 112,112,112,71,232,148
 7,7,7,6,6,6,6,7,7,7,65,0,112
]

 

doesn't seem to be in memory. Not sure why. I tried out one of the demo games that is available on the AtariWiki, and that fails to put the display list in memory. Looks like there could be a problem with Quick itself.

 

Edit: Just tried with Quick 2.1 (I was using 2.2) and the data is now being stored in memory.

Edited by Pengwin
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