Re: [stella] RIOT RAM test

Subject: Re: [stella] RIOT RAM test
From: Matthias.Domin@xxxxxxxxxxx (Matthias Domin)
Date: Tue, 26 Nov 2002 22:18:41 +0100

Dennis Debro schrieb:
> Eckhard Stolberg wrote:
> >When you do this it would be nice, if you could run a little
> >RAM test program too. I'm curious to know how random the
> >RIOT RAM really is at power-up.
> This is a simple program that will output the RAM values to the screen. Of course I had to use RAM to get this done. But it does at least give an idea of the suspected ramdomness of RAM at power up. Nothing fancy here just your typical 6 digit display. I was playing around with PAL/NTSC colors and scan lines so the right difficulty switch will change from PAL (A) and NTSC (B).
> I've run this on 3 emulators and they seem to work fine. I'm not doing anything illegal so it should work on the VCS as well. The idea is to burn this to an EPROM to see what Stella outputs at power up.

On my Junior modell it shows always zeroes (except the $EE area were 
the variables are stored). 
20 lines running in PAL:
The last two lines are (as far as i can decipher them):
00 00 03 EC 05 00
F7 00 F7 18 F7 60

Only 17 lines are visible when running in NTSC on my PAL-TV.

Matthias Domin

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