Giga-ScreenZX

Intro

Hello dear spectrum fans. Can you believe such images are possible on a standard ZX Spectrum 128k?

Well, they are thanks to gigacreen!

There are two files here. One is a set of images I have prepared using imagetozxspec

All files here should be run in USR 0 mode (type USR0 and press return, then load the file)

I have tested on heal hardware using a divide card and emulation. The images work really well on both during my experiments.

JB Giga Show

The images I used include some from the CPC demo scene that I thought would work really well, and they did. All the originals and attribution can be found at CPC-Power 

Some are my own conversion or photos.

All these files are stored as 2 separate .SRC images on the tape file

Velesoft Giga Show

The second tape file is a little different. These are images that were prepared by Velesoft some time ago and each image is stored as a double size SCR image. I wrote a small program (with much help from Red Zebra and C.born) to view these images, here is the listing:

5 CLEAR 34999
6 LET v=35000: LET o=49152
10 LOAD "" CODE v,13824
200 REM POKE 23739,111
210 OUT 32765,21
220 GO SUB 9000
230 OUT 32765,23
240 LET v=v+6912
250 GO SUB 9000
430 PAUSE 1
440 OUT 32765,16
450 PAUSE 1
460 OUT 32765,24
470 IF INKEY$<>"" THEN STOP
480 GO TO 430
8000 STOP
9000 LET u=49100-12
9010 POKE u,1: POKE u+1,0: POKE u+2,27: POKE u+3,17: POKE u+4,0: POKE u+5,192: POKE u+6,33: POKE u+7,v-256*INT (v/256): POKE u+8,INT (v/256): POKE u+9,237: POKE u+10,176: POKE u+11,201
9020 RANDOMIZE USR u
9030 RETURN
9999 LET o=49152: PRINT o-256*INT (o/256)

Emulation

Fuse does not emulate the effect very well. The best emulator to try that I have found is Es.pectrum This emulator supports giga screen and a number of other graphics mode not commonly supported by other emulators. Pressing F6 clycles through frame modes, and you may need to hit f6 a few times to get a stable image.

Remember - uses 128k mode and load the files in USR0 mode.

Conclusion

These images display really well on my real spectrum and modern LCD TV. In face I was blown away with how stable and flicker free the images appeared to be. You may get different results, and the program does used FLASHING IMAGES. Be careful if the effects you.

Have and make you own images!