From: Lukas Krickl <lukas@krickl.dev>
Date: Sat, 29 Mar 2025 18:05:53 +0000 (+0100)
Subject: character encoding: Fixed char encoding to start at 1 for '0'
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=194d5e36bf03aa194650fbb086f7fba6f294c3f6;p=gbrg%2F.git

character encoding: Fixed char encoding to start at 1 for '0'

This allows NUL terminated strings to be used and still contain '0'
---

diff --git a/src/strings.s b/src/strings.s
index 4666901..836899d 100644
--- a/src/strings.s
+++ b/src/strings.s
@@ -1,11 +1,12 @@
 ; map ascii values to the actual tileset here
-.rep i, 10, 1, .scc i + '0' = i
-.rep i, 26, 1, .scc i + 'a' = i + 10
-.rep i, 26, 1, .scc i + 'A' = i + 10
+; '0' = 0 + 1
+.rep i, 10, 1, .scc i + '0' = i + 1
+.rep i, 26, 1, .scc i + 'a' = i + 1 + 10
+.rep i, 26, 1, .scc i + 'A' = i + 1 + 10
 
 #define EMPTY_TILE 0x30
 
-#define FONT_OFFSET 0xD0 
+#define FONT_OFFSET (0xD0 - 1)
 
 ; map space to empty tile
 .scc 0x20 = EMPTY_TILE