Lynx update including file routines that access a file system on a cartridge

by Karri Kaksonen. git-svn-id: svn://svn.cc65.org/cc65/trunk@4892 b7a2c559-68d2-44c3-8de9-860c34a00d81
2010-12-29 10:37:57 +00:00
parent 4a92522c82
commit d993b332a4
10 changed files with 447 additions and 1 deletions
--- a/libsrc/lynx/load.s
+++ b/libsrc/lynx/load.s
@@ -0,0 +1,41 @@
+;
+; Karri Kaksonen, 2010
+;
+; lynx_load(fileno) is a convenience function that is widely used on the Lynx.
+; Basically this opens directory entry fileno and reads the content of the
+; file this points to into RAM.
+;
+; void lynx_load(int fileno)
+;
+	.importzp	_FileFileLen
+	.importzp	_FileDestAddr
+	.import		pushax,ldax0sp,pusha0,incsp2
+	.import		_openn
+	.import		_read
+	.export		_lynx_load
+
+; ---------------------------------------------------------------
+; void __near__ __fastcall__ lynx_load (int)
+; ---------------------------------------------------------------
+
+.segment	"CODE"
+
+.proc	_lynx_load: near
+
+.segment	"CODE"
+
+	jsr     pushax
+	jsr     ldax0sp
+	jsr     _openn
+	lda     #$01
+	jsr     pusha0
+	lda     _FileDestAddr
+	ldx     _FileDestAddr+1
+	jsr     pushax
+	lda     _FileFileLen
+	ldx     _FileFileLen+1
+	jsr     _read
+	jmp     incsp2
+
+.endproc
+