Added C-code interfaces for the CBM Kernal functions SCNKEY and UDTIM.

2026-04-24 14:17:23 +00:00 · 2016-08-07 15:47:45 -04:00
parent d90dff5861
commit 2c03b9a1bc
6 changed files with 119 additions and 8 deletions
@@ -0,0 +1,19 @@
+;
+; 2002-11-22, Ullrich von Bassewitz
+; 2016-08-07, Greg King
+;
+; SCNKEY replacement function
+;
+
+        .export         SCNKEY
+
+        .include        "plus4.inc"
+
+.segment        "LOWCODE"               ; Must go into low memory
+
+.proc   SCNKEY
+        sta     ENABLE_ROM              ; Enable the ROM
+        jsr     $FF9F                   ; Call the ROM routine
+        sta     ENABLE_RAM              ; Switch back to RAM
+        rts                             ; Return to caller
+.endproc
@@ -0,0 +1,19 @@
+;
+; 2002-11-22, Ullrich von Bassewitz
+; 2016-08-07, Greg King
+;
+; UDTIM replacement function
+;
+
+        .export         UDTIM
+
+        .include        "plus4.inc"
+
+.segment        "LOWCODE"               ; Must go into low memory
+
+.proc   UDTIM
+        sta     ENABLE_ROM              ; Enable the ROM
+        jsr     $FFEA                   ; Call the ROM routine
+        sta     ENABLE_RAM              ; Switch back to RAM
+        rts                             ; Return to caller
+.endproc