mirror of
https://github.com/cc65/cc65.git
synced 2024-06-30 01:29:37 +00:00
53dd513176
which included commits to RCS files with non-trunk default branches. git-svn-id: svn://svn.cc65.org/cc65/trunk@3 b7a2c559-68d2-44c3-8de9-860c34a00d81
40 lines
466 B
ArmAsm
40 lines
466 B
ArmAsm
;
|
|
; Ullrich von Bassewitz, 17.06.1998
|
|
;
|
|
; int _fdesc (void);
|
|
; /* Find a free descriptor slot */
|
|
|
|
|
|
.export __fdesc
|
|
.import return0, __filetab
|
|
.importzp tmp1
|
|
|
|
__fdesc:
|
|
ldy #0
|
|
L1: lda __filetab+1,y ; load flags
|
|
beq L2 ; jump if empty (== CLOSED)
|
|
iny
|
|
iny
|
|
cpy #16 ; Done?
|
|
bne L1
|
|
|
|
; File table is full
|
|
|
|
jmp return0
|
|
|
|
; Free slot found
|
|
|
|
L2: sty tmp1 ; Offset
|
|
lda #<__filetab
|
|
ldx #>__filetab
|
|
clc
|
|
adc tmp1
|
|
tay
|
|
txa
|
|
adc #0
|
|
tax
|
|
tya
|
|
rts
|
|
|
|
|