Apple2: Rewrite opendir in assembly

58 bytes size gain
2024-11-09 18:09:09 +01:00
parent 394d3b1964
commit 819a314508
3 changed files with 171 additions and 112 deletions
--- a/libsrc/apple2/dir.inc
+++ b/libsrc/apple2/dir.inc
@@ -0,0 +1,15 @@
+.struct DIR
+        FD                .word
+        ENTRY_LENGTH      .byte
+        ENTRIES_PER_BLOCK .byte
+        CURRENT_ENTRY     .byte
+
+        .union
+                BYTES               .byte 512
+                .struct CONTENT
+                        PREV_BLOCK  .word
+                        NEXT_BLOCK  .word
+                        ENTRIES     .byte
+                .endstruct
+        .endunion
+.endstruct