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authorBryan Bishop <kanzure@gmail.com>2013-09-09 19:51:29 -0700
committerBryan Bishop <kanzure@gmail.com>2013-09-09 19:51:29 -0700
commit0d6efda9bb3aa99cc9d28b9b9e7edaae121b7d75 (patch)
treee804b9ed15832481d632904f42355743d9232515 /home/delay.asm
parent6d7043c0c65161ad8ee97fa66b94beba86761d25 (diff)
parent84a9b3907b9db08ee38e873554d8a6b4ac1b72b4 (diff)
Merge pull request #198 from yenatch/split-predefs-specials-stds
decouple home/ from engine/
Diffstat (limited to 'home/delay.asm')
-rw-r--r--home/delay.asm23
1 files changed, 23 insertions, 0 deletions
diff --git a/home/delay.asm b/home/delay.asm
new file mode 100644
index 000000000..4e8b2147c
--- /dev/null
+++ b/home/delay.asm
@@ -0,0 +1,23 @@
+DelayFrame: ; 45a
+; Wait for one frame
+ ld a, 1
+ ld [VBlankOccurred], a
+
+; Wait for the next VBlank, halting to conserve battery
+.halt
+ halt ; rgbasm adds a nop after this instruction by default
+ ld a, [VBlankOccurred]
+ and a
+ jr nz, .halt
+ ret
+; 468
+
+
+DelayFrames: ; 468
+; Wait c frames
+ call DelayFrame
+ dec c
+ jr nz, DelayFrames
+ ret
+; 46f
+