Search found 419 matches

by stefano
Thu Jun 11, 2020 2:52 pm
Forum: Development
Topic: Horse
Replies: 2
Views: 334

Horse

This is just an experiment I did in the past.
It is kind of cute, runs on 8K and I didn't want to just throw it away.. The current level of the graphics demos is far superior, so I'm not sure it can be of any interest, maybe the source is ?

horse.c
(21.43 KiB) Downloaded 17 times
HORSE.P
(5.42 KiB) Downloaded 16 times
by stefano
Mon Apr 27, 2020 3:40 pm
Forum: Development
Topic: Pseudo HR prototype
Replies: 11
Views: 1647

Re: Pseudo HR prototype

Errm.. if incidentally someone could see it running on the real hardware just say 'works' :?
by stefano
Wed Apr 22, 2020 10:18 pm
Forum: Hardware
Topic: Help diagnosing a signal issue
Replies: 9
Views: 713

Re: Help diagnosing a signal issue

finally I think I found the ptoblem.. in the video cable :)
by stefano
Tue Apr 21, 2020 5:59 pm
Forum: Development
Topic: Pseudo HR prototype
Replies: 11
Views: 1647

Re: Pseudo HR prototype

Pushing the library at its maximum: 200 rows could still work. :twisted:
rndsphere_200.p
(3.92 KiB) Downloaded 26 times
Program looks smaller because it is now able to allocate the screen buffer automatically (lowering SP).
by stefano
Sun Apr 19, 2020 10:05 pm
Forum: Hardware
Topic: Help diagnosing a signal issue
Replies: 9
Views: 713

Re: Help diagnosing a signal issue

I must add: thankyou "ZX80 Paul" for the circuit!
..and for having pushed me in adding a bit of ZX80 related code to Z88DK ;)
by stefano
Sun Apr 19, 2020 8:31 pm
Forum: Hardware
Topic: Help diagnosing a signal issue
Replies: 9
Views: 713

Re: Help diagnosing a signal issue

Correct, I have a CCP circuit, I just tested on the SONY and it is much better on it :)
I'm not very fond on tuning though because I have the original membrane with very short ribbons .. and I'm not sure i can open it again.
by stefano
Sun Apr 19, 2020 8:18 pm
Forum: ZX BASIC
Topic: Tricks in BASIC
Replies: 40
Views: 24119

Re: Tricks in BASIC

Ahh.. PI and "NOT PI".. that's the way to optimize!
The Spectrum has also "BIN" meaning zero as well, but it adds the whole mantissa, thus it is equivalent to '0'. Yet NOT PI is the only choice
by stefano
Sun Apr 19, 2020 8:10 pm
Forum: Development
Topic: Pseudo HR prototype
Replies: 11
Views: 1647

Re: Pseudo HR prototype

the library development is being harder than expected, I've been debugging putsprite for a couple of weeks and still I don't see what's wrong! same for plotting and line drawing. . I'm suspecting a memory leak or corrupted registers because there is no direct connection between the bugs and the chan...
by stefano
Sun Apr 19, 2020 7:58 pm
Forum: Hardware
Topic: Help diagnosing a signal issue
Replies: 9
Views: 713

Re: Help diagnosing a signal issue

I have a Samsung giving me headaches.. I see the picture shifting from quite stable, to noisy, then suddend interruptions, and so on I wonder if it is just the thin cable or the SCART adapter (direct compoisite feed). I tuned the CCP on a SONY Bravia and it worked well (I'll try on it again in the n...
by stefano
Sat Apr 04, 2020 11:24 pm
Forum: Development
Topic: Pseudo HR prototype
Replies: 11
Views: 1647

Re: Pseudo HR prototype

is the picture on top or centered? EO centres it, It's obviously better but I couldn't understand why it happens.