Smoothie by Samar Productions
screenshot added by DKT on 2020-12-19 10:41:21
platform :
type :
release date : december 2020
release party : speccy.pl party 2020
compo : n/a
ranked : n/a
  • 8
  • 1
  • 0
popularity : 48%
  • 0.89
alltime top: #22380
added on the 2020-12-19 10:41:21 by DKT DKT

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Sweet !
rulez added on the 2020-12-19 13:19:23 by Ramon B5 Ramon B5
rulez added on the 2020-12-19 18:15:52 by ham ham
nice one
rulez added on the 2020-12-19 23:22:35 by Blast! Blast!
awesome, but music sux! :)
rulez added on the 2020-12-21 05:00:01 by tonyrocks tonyrocks
Sorry for the lack of music, but this small demo was done for a specific compo and custom hardware which you can find info about at https://www.speccy.pl/forum/index.php?topic=5545.0 [PL].
The purpose of this production is to show that smooth scrolling is also possible on this platform by using pseudo hires mode and by finding appropriate patterns in ROM. It works fine with unmodded RAMPACK.
To emulate scrolling f.e. of "one pixel" of char (here it's line 8x1 pixels) I needed this values to do it: ...,$FF00,$3FC0,$0FF0,$03FC,$00FF,... . If you decode this combinations to binary representation you will find it's a shift of eight ones by 2 pixels. I found such patterns in $1C page of ROM (edition 2 only).
Logo was drawn by Isildur with restricted bits combination from that page only, so... kudos mate! :)
I've made a special tool do a conversion from C64 logo (chars+screen) to ZX-81 bitmap. It let's you compare the result with all ROM pages and choose the best fitting one. If anyone is interested just let me know.
ZX-81 is very interesting machine, with more unknown possibilities to show, but it needs more love... <3
See ya,
added on the 2020-12-21 11:00:21 by DKT DKT
Smoothie demo on ZX81, great platform debut!
rulez added on the 2020-12-21 12:28:21 by Tygrys Tygrys
from c64 to zx81? Cool! ;)
rulez added on the 2021-02-13 18:53:27 by Dalthon Dalthon
Nice one!
rulez added on the 2021-12-16 18:51:36 by nollkolltroll nollkolltroll
rulez added on the 2022-04-24 08:38:02 by spkr spkr

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