Re: [stella] Random seed

Subject: Re: [stella] Random seed
From: Fabrizio Zavagli <fabrizio.zavagli@xxxxxxxxx>
Date: Thu, 14 Apr 2005 14:30:00 -0400
On 4/14/05, Bob Montgomery <BobM@xxxxxxxxxxx> wrote:
> "... but I keep getting the same values from INTIM each time I run the binary! :("
> What value(s) do you get?

On z26 (decimal values in brackets):

With single WSYNC method:

TIM1T = $45 (76) gives INTIM = $15 (21)
TIM1T = $54 (86) gives INTIM = $1f (31)


TIM1T = $45 (76) gives INTIM = $2e (46)
TIM1T = $54 (86) gives INTIM = $38 (56)

The values for TIM1T I've experimented with are just basically random
(76 and 86). With the VBLANK the timer likely wraps, but I think
that's of minor relevance at this stage...

On the real hardware I don't have the exact numbers at the moment, but
I use the seed value to set the background (the power of laziness) and
it comes up in the same color each time!

If helpful, I can clean up a bit the currently very messy source and post it!

Thanks and ciao,
Archives (includes files) at
Unsub & more at

Current Thread