Page 3 of 4
Posted: Tue Jan 27, 2009 11:42 pm
by 8bitwizard
TmEE co.(TM) wrote:CLR, BTST and some other instructions cannot be used with VDP
That is correct. CLR is a read/modify/write instruction just like AND and OR, even though it ignores the read value.
I learned this years ago when working on a boot rom for a 68000 system that used parity RAM. This was in the initial memory clear loop, and it basically crashed with a bus error right away because it tried to read the uninitialized RAM.
Posted: Wed Jan 28, 2009 2:32 am
by Jorge Nuno
Umm, I've got rid of almost all CLRs in my prog, only a few left, but none to the VDP. And now the prog jumps over the RAM checker.
Please test it again
Posted: Wed Jan 28, 2009 7:04 am
by ScroGer
OMG IM BUSTING A FUCKING NUT AS WE SPEAK, THIS IS SOOOOOOOOOOOOOOOOOOOOOOOOOOO DAMN COOL
Posted: Wed Jan 28, 2009 5:16 pm
by TmEE co.(TM)
Holy kaka
Posted: Wed Jan 28, 2009 5:25 pm
by Shiru
TmEE, not all people uses resolution >2048, so please, scale down your photos (use thumbnails or something).
Posted: Wed Jan 28, 2009 5:37 pm
by Jorge Nuno
WHAT!
LOOL is that the real thing? Did you alter anything?
Posted: Wed Jan 28, 2009 5:51 pm
by TmEE co.(TM)
That is from my MD2, and I used the latest greatest ROM, and did not do any changes to it...
Do you initialize all variables ? RAM is full of garbage on startup on real HW.... that caused me a lot of headache when I made Glass Breaker MD.
Shiru wrote:TmEE, not all people uses resolution >2048, so please, scale down your photos (use thumbnails or something).
Sorry for that, I was in a hurry...
Posted: Wed Jan 28, 2009 5:56 pm
by Jorge Nuno
It should "detect" zero RAM now becuase I jump over it...
Does the color animates?
Seems some kind of garbage in plane A.
Press B
Posted: Thu Jan 29, 2009 3:37 am
by HardWareMan
Once, I've got same thing. I forgot to erase all 64K of VRAM and when I used PlaneA with priority bit (I though this is enought) I've still got garbage. And not on transparent color. Here is proof pics:
Posted: Thu Jan 29, 2009 3:39 am
by Jorge Nuno
At last it runs (acheivement unlocked
) ! Well sort of... I'll try to fix that tomorrow..
Posted: Thu Jan 29, 2009 6:34 am
by TmEE co.(TM)
I must notice that I need a lot of hard and soft resets to get it sort of running... sometimes the system boots up with VDP outputting wrong sync or something, freaky...
Posted: Thu Jan 29, 2009 9:29 pm
by Jorge Nuno
Done and reupped. I hope it looks ok...
Re-enabled RAM capacity checker.
Posted: Mon Feb 02, 2009 5:31 pm
by ScroGer
so whats the point???????
Posted: Mon Feb 02, 2009 5:49 pm
by TmEE co.(TM)
to do things you cannot do in BEX
I need to check the ROM....
Posted: Mon Feb 02, 2009 9:24 pm
by Jorge Nuno
TmEE co.(TM) wrote:to do things you cannot do in BEX
I need to check the ROM....
Don't forget to press B (assuming it works), and doing random moves to $C0001E or something...
