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Great Pictures I
Title:Great Pictures I
Category:Demo/Picture Show
Release Date:
Language:Hungarian
Size:64K
Device Req.:1551 only (1 side)
Machine:PAL Only
Code Type:Machine code
Distribution:Freeware
 Play Online!
Released by:ICE-Team
Created by:TMCH
Credited (Additional code by):Ceekay
Notes:AKA Great Pictures-I. Conversion of the C64 picture show RS Slideshow, with a different SID tune. The release date appears in the directory listing.
  External links:
    C64 release

User Rating: 4.3/10 (3 votes)
Great Pictures I Screenshot


Effects
PartEffect nameParametersNotes
Extended Vertical Border 
Shadelines Randomly draw the current picture.


Description
Following the line of the C64 original, all the bitmaps shown in this picture show have been drawn by Redstar/Logic. Moreover, just like the C64 counterpart, the implementation of an extended vertical border allows to display the entire picture, keeping the bottom of the screen free for some info text. Right on that part of the screen, the original demo features sprites on the border, looking like a rotating DXYCP, whereas the Plus/4 counterpart shows a variable speed 2x2 sized textscroller, which remains active even during the loading of the next bitmaps via IRQ loader.

On the first run, the program loads the very first bitmap to display, but the screen is black, until the Space bar has been pressed, and the randomly drawn shadelines run on the screen taking out the bitmap to appear pixel after pixel. Those shadelines never touch all the pixels on the screens, so waiting for the picture to get created is a long and unfinished process. Hence, pressing the Space bar once again cuts off the bitmap's buildup routine and finally displays the whole picture. While this happens, the program starts to load the next one.

The show wraps over in a continuous loop, but due to a coder's oversight, the very first bitmap doesn't load anymore

The IRQ loader works with 1551 drive only. Moreover, it demonstrates certain flaws which make it prone to break. This arguably happens due to the bad implementation of the Space bar to get further in the show: pressing too much, or pressing it again later during the IRQ loader, might make it break, or make it load only a part of the bitmap.

The quality of the graphic conversions is unfortunately mediocre. Moreover, the two fixed colors assigned to the registers $FF16/$FF17, never change along all the show, using the same values since the very first display: $34 for the former, $6E for the latter.
A slightly better acceptable result can be obtained by changing the fixed value for $FF16 to $19. If via emulator, enter in Monitor:
>6134 19

and press Return.

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