X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;ds=sidebyside;f=ROM2%2Fhelpers.c;h=a35073cf5ca7400a177f08ff1e9127238fcfe7b5;hb=2e7a8beb908896930042bc0564fbd16f3e0b0b62;hp=b44be32f2846a2eb600c7b9e6da9d390b2aa5068;hpb=c9763dcb182398266bae1c6a7a848beec1cba35d;p=uccvend-snackrom.git

diff --git a/ROM2/helpers.c b/ROM2/helpers.c
index b44be32..a35073c 100644
--- a/ROM2/helpers.c
+++ b/ROM2/helpers.c
@@ -1,6 +1,32 @@
+#include "display_basic.h"
 #include "vend.h"
 
+#define DELAY_MAGIC 20 /* FIXME: number of loops for ~ 1 millisecond (< 256) */
 void delay(u16 ms) {
-	/* FIXME fill me in */
+	u8 i;
+	for (;ms;ms--) {
+		for (i=0;i<DELAY_MAGIC; i++)
+			asm("nop\nnop\nnop\nnop\nnop\n");
+	}
 }
 
+void print_amount(u16 amt) {
+	/* take amt and show it on screen with a $ sign */
+	char str[10] = {' ', '$', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '};
+	u8 pos;
+	for (pos = 7; amt; pos--, amt/=10) {
+		str[pos] = amt%10 + '0';
+	}
+	set_msg(str);
+}
+
+void my_strncpy(char* dst, char* src, u8 max_size) {
+	u8 i;
+	for (i = 0; src[i] && i < max_size; i++) dst[i] = src[i];
+	if (src[i] == 0 && i < max_size) dst[i] = 0; /* null terminator */
+}
+
+void my_memcpy(char* dst, char* src, u8 size) {
+	u8 i = 0;
+	for (i = 0; i < size; i++) dst[i] = src[i];
+}