Difference between revisions of "Code:NextBasic Snippets"

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'''NextBasic Snippets
 
'''NextBasic Snippets
 
'''
 
'''
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 +
A collection of short, specific, commonly used functions usable in a wide variety of software.  Snippets should be "side effect" free (no unintended consequences) and, where applicable, contain an explanation of any "Magic numbers" or obscure routines used.
  
 
To read a file of any type or size to any bank this will load myfile.bin to bank 22 (8kbs):
 
To read a file of any type or size to any bank this will load myfile.bin to bank 22 (8kbs):
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<syntaxhighlight>
 
<syntaxhighlight>
 
OPEN #4, "myfile"
 
OPEN #4, "myfile"
−
DIM #4 TO %a
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DIM #4 TO a
−
fsize=%a
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fsize=a
 
CLOSE #4
 
CLOSE #4
−
</syntaxhighlight>
 
−
 
−
Check if a file exists in a location without generating an error
 
−
<syntaxhighlight>
 
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Layer 2,0: print at 0,0; : cat file$: exist$=screen$(0,0)
 
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Layer 0: If exist$<>"N" then print "File found"
 
−
</syntaxhighlight>
 
−
 
−
Press space to continue with flashy border when waiting for a key
 
−
<syntaxhighlight>
 
−
Print "Press Space to continue": randomize usr 1300
 
 
</syntaxhighlight>
 
</syntaxhighlight>
  
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Get the current CORE version
 
Get the current CORE version
 
<syntaxhighlight>
 
<syntaxhighlight>
−
10 DEFPROC Nreg(r)
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10 DEFPROC CoreVersion()
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20 OUT 9275,1: LET %i= IN 9531: LET m=%i>>4: LET ml=%i&@00001111
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20 %i=% REG 1: LET m=%i>>4: LET ml=%i&@00001111
−
30 OUT 9275,14: LET i= IN 9531: PRINT INK 2;"Current core :";m;".";ml;".";i
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30 i=% REG 14: LET i= IN 9531: PRINT INK 2;"Current core :";m;".";ml;".";i
 
40 ENDPROC  
 
40 ENDPROC  
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</syntaxhighlight>
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Get Next version running
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<syntaxhighlight>
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.nextver v
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print "Current Next OS:";v
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if v<2.07 then print "Think about upgrading your distro"
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</syntaxhighlight>
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Capture the output from a dotcommand
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<syntaxhighlight>
 +
10 DIM v$(768)
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20 OPEN #2, "v>v$"
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30 .http  :; this will send the help text to v$
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40 CLOSE #2
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50 PRINT "*";v$;"*"
 
</syntaxhighlight>
 
</syntaxhighlight>

Latest revision as of 19:04, 17 February 2024

NextBasic Snippets

A collection of short, specific, commonly used functions usable in a wide variety of software. Snippets should be "side effect" free (no unintended consequences) and, where applicable, contain an explanation of any "Magic numbers" or obscure routines used.

To read a file of any type or size to any bank this will load myfile.bin to bank 22 (8kbs): 

.extract myfile.bin -mb 22

To get the filesize of a file in to var fsize: 

OPEN #4, "myfile"
DIM #4 TO a
fsize=a
CLOSE #4

Scroll screen up without prompt 

poke 23692,255: print at 20,0;"Scroll my screen"
for s=1 to 20: print at 21,31;" ": next s

Select a file type to use by browsing the SD 

.browse -t pt3 m$
If m$<>"" then .$ playpt3 m$

Change the font width to X pixels when printing 

10 LAYER 1,1 : CLS
20 PRINT CHR$ 30+CHR$ 5  : REM 5 pixels wide
30 PRINT "HELLO"

Get the current CORE version 

10 DEFPROC CoreVersion()
20 %i=% REG 1: LET m=%i>>4: LET ml=%i&@00001111
30 i=% REG 14: LET i= IN 9531: PRINT INK 2;"Current core :";m;".";ml;".";i
40 ENDPROC

Get Next version running 

.nextver v
print "Current Next OS:";v
if v<2.07 then print "Think about upgrading your distro"

Capture the output from a dotcommand 

10 DIM v$(768)
20 OPEN #2, "v>v$"
30 .http   :; this will send the help text to v$
40 CLOSE #2
50 PRINT "*";v$;"*"
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