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Compute! Gazette 1990 May
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1990-05.d64
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ml programming
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Commodore BASIC
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2022-09-20
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519b
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25 lines
5 print"[147][154]":poke53280,14:poke53281,6
10 print"this program reads the restore key by"
20 print"changing the non-maskable interrupt"
30 print"vector. press restore for count or "
40 print"run/stop to exit."
100 data 238,96,3,76
110 for j=828 to 831
120 read x:poke j,x:next j
130 poke 832,peek(792)
140 poke 833,peek(793)
150 poke 792,60:poke 793,3
160 x=peek(864)
170 y=peek(864)
180 if x=y goto220
190 n=n+1
200 x=x+1:if x=256 then x=0
210 goto170
220 if n=n0 goto250
230 n0=n
240 print n;"restore presses seen"
250 get k$:if k$="" goto170
260 poke 792,peek(832)
270 poke 793,peek(833)
280 print "program ended."