Loading and saving memory areas on cbm platforms

git-svn-id: svn://svn.cc65.org/cc65/trunk@625 b7a2c559-68d2-44c3-8de9-860c34a00d81
2001-03-13 22:48:19 +00:00
parent 7c4bcbd569
commit 16fded6d0c
8 changed files with 93 additions and 15 deletions
--- a/libsrc/cbm/c_save.s
+++ b/libsrc/cbm/c_save.s
@@ -0,0 +1,28 @@
+;
+; Marc 'BlackJack' Rintsch, 11.06.1999
+;
+; unsigned __fastcall__ cbm_k_save(unsigned int start, unsigned int end);
+;
+
+        .include        "cbm.inc"
+
+        .export         _cbm_k_save
+        .import         popax
+        .importzp       ptr1, tmp1
+
+_cbm_k_save:
+        sta     tmp1            ; store end address
+        stx     tmp1+1
+        jsr     popax           ; pop start address
+        sta     ptr1
+        stx     ptr1+1
+        lda     #ptr1
+        ldx     tmp1
+        ldy     tmp1+1
+        jsr     SAVE
+        ldx     #0
+        bcc     @Ok
+        inx
+        rts
+@Ok:    txa
+        rts