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https://github.com/cc65/cc65.git
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b2e0ed603e
changed/added some comments all cbm_* IO functions are using _oserror now git-svn-id: svn://svn.cc65.org/cc65/trunk@682 b7a2c559-68d2-44c3-8de9-860c34a00d81
33 lines
726 B
C
33 lines
726 B
C
/*
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* Marc 'BlackJack' Rintsch, 25.03.2001
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*
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* int cbm_write(unsigned char lfn, void* buffer, unsigned int size);
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*/
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#include <cbm.h>
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extern unsigned char _oserror;
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int cbm_write(unsigned char lfn, void* buffer, unsigned int size) {
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static unsigned int byteswritten;
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/* if we can't change to the outputchannel #lfn then return an error */
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if (_oserror = cbm_k_ckout(lfn)) return -1;
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byteswritten = 0;
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while (byteswritten<size && !cbm_k_readst()) {
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cbm_k_bsout(((unsigned char*)buffer)[byteswritten++]);
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}
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if (cbm_k_readst()) {
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_oserror = 5; /* device not present */
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byteswritten = -1;
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}
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cbm_k_clrch();
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return byteswritten;
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}
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