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More cbm510 changes to make file I/O and kernal access work

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2846 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2003-12-27 16:11:14 +00:00
parent 40a48c59b8
commit dada43f570
27 changed files with 670 additions and 642 deletions
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22
libsrc/cbm510/kopen.s Normal file
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@@ -0,0 +1,22 @@
;
; Ullrich von Bassewitz, 2003-12-20
;
; OPEN kernal call.
;
; NOTE: The OPEN system call in the CBM610 kernal is different from the
; standard. It evaluates the carry flag and does a normal open if carry clear
; and some strange things (output sa 15 + name on IEC) if carry set. To be
; compatible with our CBM file stuff, we have to clear the carry before
; calling the real OPEN.
.export OPEN
.proc OPEN
clc
jmp $FFC0
.endproc