Freezing Basic

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MrPixel
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Freezing Basic

Post by MrPixel »

i decided to screw around with basic and decided to make a inescapable loop

(i was bored)

10 REM gosub loop
11 plot 12,2
12 draw 14,2
13 if Inkey$="a" then goto 20
20 goto 10


any other ways to do so?
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R-Tape
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Re: Freezing Basic

Post by R-Tape »

any other ways to do so?
I give you Spectropolis, a city that slowly comes to life at night. Watch and wonder as the lights from buildings, cars and stars flicker while the inhabitants go about their business.

Code: Select all

5 BORDER 0: PAPER 0: CLS
10 INK 1+(RND*7)
20 PLOT RND*255, RND*175
40 GOTO 10
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RMartins
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Re: Freezing Basic

Post by RMartins »

Code: Select all

10 FOR i= 1 TO 2 STEP 0
20 PRINT i
30 NEXT i
Dumb loop will keep BASIC ocuppied.
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1024MAK
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Re: Freezing Basic

Post by 1024MAK »

Code: Select all

10 LET HELL=20 : LET bottles=1E8
20 POKE 23692,255
30 PRINT bottles;" green bottles sitting"',"on the wall..."
40 LET bottles=bottles-1
50 GO TO HELL
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MrPixel
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Re: Freezing Basic

Post by MrPixel »

1024MAK wrote: Wed May 16, 2018 5:52 pm

Code: Select all

10 LET HELL=20 : LET bottles=1E8
20 POKE 23692,255
30 PRINT bottles;" green bottles sitting"',"on the wall..."
40 LET bottles=bottles-1
50 GO TO HELL
Mark
LOL :lol:
MrPixel
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Re: Freezing Basic

Post by MrPixel »

you magnificent Bas**rd!
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Ast A. Moore
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Re: Freezing Basic

Post by Ast A. Moore »

When I was modding my Toast Rack to improved the video output quality, I needed to create a gray screen in BASIC, which would also access contended memory with with a varying frequency. So just did this and pressed buttons while it ran:

Code: Select all

1 RUN
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R-Tape
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Re: Freezing Basic

Post by R-Tape »

Is it possible to properly freeze BASIC (disable BREAK) without using POKE or any USR?
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Ast A. Moore
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Re: Freezing Basic

Post by Ast A. Moore »

R-Tape wrote: Wed May 16, 2018 8:03 pm Is it possible to properly freeze BASIC (disable BREAK) without using POKE or any USR?
I don’t think so. Since you can’t disable interrupts (from BASIC), and the ISR at $38 is what checks for keypresses, I don’t see an obvious way of doing that. Well, BEEP (and a few other BASIC commands) do disable interrupts, but making a long BEEP is more of a cheat.

EDIT: Oh, you can’t fool BASIC that easily, either. BEEP doesn’t allow to play super long notes. :D
Every man should plant a tree, build a house, and write a ZX Spectrum game.

Author of A Yankee in Iraq, a 50 fps shoot-’em-up—the first game to utilize the floating bus on the +2A/+3,
and zasm Z80 Assembler syntax highlighter.
AndyC
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Re: Freezing Basic

Post by AndyC »

Code: Select all

10 POKE 23620,0
;)
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PeteProdge
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Re: Freezing Basic

Post by PeteProdge »

R-Tape wrote: Wed May 16, 2018 8:03 pm Is it possible to properly freeze BASIC (disable BREAK) without using POKE or any USR?
There was a small machine code routine printed in Your Sinclair's Program Pitstop - I'm sure it was under the confusing name of 'Break-Out'. It made BASIC unbreakable. The BREAK key was just treated as if you pressed the SPACE bar on its own.
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Seven.FFF
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Re: Freezing Basic

Post by Seven.FFF »

R-Tape wrote: Wed May 16, 2018 8:03 pm without using POKE or any USR?
Custom ROM'd do it! ;P
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