2016-12-14 20:22:10 +00:00
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.export _open
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.import addysp,popax
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2017-01-29 20:18:49 +00:00
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.importzp sp,tmp2,tmp3,tmp1
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2017-01-04 19:03:19 +00:00
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2017-01-29 20:18:49 +00:00
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; int open (const char* name, int flags, ...); /* May take a mode argument */
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.include "telemon30.inc"
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.include "errno.inc"
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.include "fcntl.inc"
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2016-12-14 20:22:10 +00:00
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.proc _open
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; Throw away any additional parameters passed through the ellipsis
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dey ; Parm count < 4 shouldn't be needed to be...
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dey ; ...checked (it generates a c compiler warning)
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dey
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dey
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2017-01-29 20:18:49 +00:00
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beq parmok ; Branch if parameter count ok
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jsr addysp ; Fix stack, throw away unused parameters
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2016-12-14 20:22:10 +00:00
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; Parameters ok. Pop the flags and save them into tmp3
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2017-01-29 20:18:49 +00:00
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parmok: jsr popax ; Get flagss
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sta tmp3 ; save flags
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2016-12-14 20:22:10 +00:00
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; Get the filename from stack and parse it. Bail out if is not ok
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2017-01-29 20:18:49 +00:00
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jsr popax ; Get name
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ldy tmp3 ; Get flags again
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BRK_TELEMON XOPEN ; launch primitive ROM
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2016-12-14 20:22:10 +00:00
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rts
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.endproc
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