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Added _directerrno() to the sim6502/sim65c02 libraries.

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This commit is contained in:
Greg King 2015-07-18 18:23:08 -04:00
parent 0b6bcb565e
commit a9982de475
1 changed files with 20 additions and 2 deletions
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22
libsrc/sim6502/errno.s
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@ -1,11 +1,29 @@
;
; Oliver Schmidt, 2013-05-16
; 2013-05-16, Oliver Schmidt
; 2015-07-18, Greg King
;
; extern int errno;
; Helper functions for several high-level functions.
;
.include "errno.inc"
; ----------------------------------------------------------------------------
; int __fastcall__ _directerrno (unsigned char code);
; /* Set errno to a specific error code; and, return -1. Used
; ** by the library.
; */
__directerrno:
jsr __seterrno ; Save in errno
fail: lda #$FF ; Return -1
tax
ok: rts
; ----------------------------------------------------------------------------
;
; extern int _errno;
;
.bss
__errno: