Added missing PCE conio functions.

2018-03-11 00:49:40 +01:00
parent 71e3330eca
commit 789ce59fb5
4 changed files with 77 additions and 6 deletions
--- a/libsrc/pce/cclear.s
+++ b/libsrc/pce/cclear.s
@@ -0,0 +1,25 @@
+;
+; Ullrich von Bassewitz, 08.08.1998
+;
+; void cclearxy (unsigned char x, unsigned char y, unsigned char length);
+; void cclear (unsigned char length);
+;
+
+        .export         _cclearxy, _cclear
+        .import         gotoxy, cputdirect
+        .importzp       tmp1
+
+_cclearxy:
+        pha                     ; Save the length
+        jsr     gotoxy          ; Call this one, will pop params
+        pla                     ; Restore the length and run into _cclear
+
+_cclear:
+        cmp     #0              ; Is the length zero?
+        beq     L9              ; Jump if done
+        sta     tmp1                                 
+L1:     lda     #$20            ; Blank - screen code
+        jsr     cputdirect      ; Direct output
+        dec     tmp1
+        bne     L1
+L9:     rts