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Fayl:Locomotive BASIC color bars.gif

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Asl fayl(841 × 586 piksel, fayl hajmi: 58 KB, MIME tipi: image/gif, looped, 128 frames, 11 soniya)

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Taʼrif
English: An Amstrad CPC emulated in MAME running a short Locomotive BASIC demo program which displays color bars similar to SMPTE color bars or EBU colour bars.
Sanasi
Manba Oʻzimning ishim
Muallif Morn

Locomotive BASIC program

10 mode 0
20 ink 1,26:ink 2,24:ink 3,20:ink 4,18
30 ink 5,8:ink 6,6:ink 7,2:ink 8,0
40 for i=1 to 8
50 paper i
60 print space$(40);
70 next

Program notes

  • Key words are printed in uppercase when the program is output with "list". But entering code is usually done in lowercase.
  • line 10: screen mode 0 is used (16 colours; 20x25 characters)
  • lines 20/30: set up colour palette; note that multiple instructions can be combined on a line
  • lines 40 to 70: a "for" loop over i
  • line 50: set the paper (background) colour to i
  • line 60: print 40 spaces (= 2 lines); space$ is a built-in function that returns a string
  • When the program ends, the "Ready" prompt is white-on-black because the current foreground (pen) colour, which is 1, had been set to white ("ink 1,26"). The background colour is 8 after the loop and "ink 8,0" had set that to black previously. See File:Amstrad CPC ink numbers.png for a chart of Amstrad ink numbers.

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Locomotive BASIC inglizcha

24 Dekabr 2023

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joriy20:15, 24-Dekabr 202320:15, 24-Dekabr 2023 dagi versiya uchun tasvir841 × 586 (58 KB)MornUploaded own work with UploadWizard

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