points working

asm_strlen.asm

@@ -0,0 +1,50 @@
+; ===============================================================
+; Dec 2013
+; ===============================================================
+;
+; size_t strlen(const char *s)
+;
+; Return length of string s.
+;
+; ===============================================================
+
+
+SECTION code_clib
+SECTION code_string
+
+PUBLIC asm_strlen
+
+asm_strlen:
+
+   ; enter: hl = char *s
+   ;
+   ; exit : hl = length
+   ;        bc = -(length + 1)
+   ;         a = 0
+   ;        z flag set if 0 length
+   ;        carry reset
+   ;
+   ; uses : af, bc, hl
+
+   xor a
+   ld c,a
+   ld b,a
+
+   cpir
+
+   ld hl,$ffff
+   sbc hl,bc
+
+   ret
+
+PUBLIC _strlen
+
+_strlen:
+
+   pop af
+   pop hl
+
+   push hl
+   push af
+
+   jp asm_strlen

game_zx.c

@@ -2,17 +2,27 @@
 #include <stdlib.h>
 #include <arch/zx.h>
 #include <arch/zx/sp1.h>
+#include "globals.h"
+
+extern uint8_t strlen(char * chars);
+
+// temporary buffer to print points (e.g. 65535)
+char * chars = "0000000\0";
+
 
 // reversed order digit extract
-void print_points(uint16_t number) {
-    uint8_t pos = 18;
+void print_points() {
+    utoa(points, chars, 10);
+    col = 5 - strlen(chars);
 
-    while (number > 0)
-    {
-        number = number % 10;
-        number /= 10;
-        //print digit
-        sp1_PrintAtInv(0, pos, INK_CYAN | PAPER_BLACK, 48 + number);
-        --pos;
+    if(col != 0) {
+        for(idx = 0; idx != 5; ++idx) {
+            sp1_PrintAtInv(0, 26 + idx, INK_CYAN | PAPER_BLACK, '0');
+        }
+    }
+    idx = 0;
+    while(chars[idx] != '\0') {
+        sp1_PrintAtInv(0, 26 + idx + col, INK_CYAN | PAPER_BLACK, chars[idx]);
+        ++idx;
     }
 }

game_zx.h

@@ -4,6 +4,6 @@
 #include <z80.h>
 #include <arch/zx.h>
 
-extern void print_points(uint16_t number);
+extern void print_points();
 
 #endif

alley.c → msnampac.c

@@ -68,6 +68,13 @@ void all_lives_lost() {
 
   }
 
+  sp1_PrintAtInv(0, 19, INK_RED | PAPER_BLACK, 'P');
+  sp1_PrintAtInv(0, 20, INK_RED | PAPER_BLACK, 'O');
+  sp1_PrintAtInv(0, 21, INK_RED | PAPER_BLACK, 'I');
+  sp1_PrintAtInv(0, 22, INK_RED | PAPER_BLACK, 'N');
+  sp1_PrintAtInv(0, 23, INK_RED | PAPER_BLACK, 'T');
+  sp1_PrintAtInv(0, 24, INK_RED | PAPER_BLACK, 'S');
+
   sp1_PrintAt(0, 2, INK_RED | PAPER_BLACK, 'L');
   sp1_PrintAt(0, 3, INK_RED | PAPER_BLACK, 'I');
   sp1_PrintAt(0, 4, INK_RED | PAPER_BLACK, 'V');
@@ -157,6 +164,7 @@ int main()
 
      if(frame == 5) {
         frame = 0;
+        print_points();
      }
 
      wait();

zproject.lst

@@ -4,5 +4,6 @@ game_zx.c
 logic.c
 sprites.c
 globals.c
-alley.c
 int.c
+msnampac.c
+asm_strlen