Optimized mul20 & mul40 and extracted to new library.

2019-03-21 15:59:45 +01:00
parent fbf302e6cd
commit 399250a105
14 changed files with 216 additions and 92 deletions
--- a/libsrc/atari/setcursor.s
+++ b/libsrc/atari/setcursor.s
@@ -4,7 +4,7 @@
 ; cursor handling, internal function

        .include "atari.inc"
-        .import cursor,mul40
+        .import cursor,_mul40
        .export setcursor

 .proc   setcursor
@@ -14,8 +14,7 @@
        sta     (OLDADR),y

        lda     ROWCRS
-        jsr     mul40
-        clc
+        jsr     _mul40          ; function leaves with carry clear!
        adc     SAVMSC          ; add start of screen memory
        sta     OLDADR
        txa