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annotate lib/alib/to_upper.a @ 2664:09feb97c181f lwtools-port

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Initial changes to use lwasm instead of mamou Initial high level changes to use lwasm instead of mamou.
author William Astle <lost@l-w.ca>
date Sun, 10 Jun 2012 12:40:11 -0600
parents 7d70b7e1cb21
children aaba193af04f
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1 ***************************************************
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3 * Convert character in "B" to uppercase
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4
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5 * OTHER MODULES NEEDED: IS_LOWER
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7 * ENTRY: B=ascii value of character to convert
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9 * EXIT: B=ascii value of character in uppercase
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11 * Note: control codes, etc. are not effected.
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14 nam Convert Char to Uppercase
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15 ttl Assembler Library Module
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18 psect TO_UPPER,0,0,0,0,0
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20 TO_UPPER:
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21 pshs cc
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22 lbsr IS_LOWER only lowercase can be converted to upper
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23 bne toupx
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24 subb #$20 make uppercase
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26 toupx
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27 puls cc,pc
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29 endsect
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