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authorJuan J. Martinez <jjm@usebox.net>2020-12-30 19:07:31 +0000
committerJuan J. Martinez <jjm@usebox.net>2020-12-30 19:23:41 +0000
commit2682bc5d1d864341aaeb42a449db73c3ecd16d70 (patch)
tree9116764364b4ee0ce7f6037305077807b57776de /src/ubox/ubox_get_tile.z80
downloadubox-msx-lib-ca9b663c147340e92804979a96eee4113ab0b27f.tar.gz
ubox-msx-lib-ca9b663c147340e92804979a96eee4113ab0b27f.zip
Initial import1.0
Diffstat (limited to 'src/ubox/ubox_get_tile.z80')
-rw-r--r--src/ubox/ubox_get_tile.z8028
1 files changed, 28 insertions, 0 deletions
diff --git a/src/ubox/ubox_get_tile.z80 b/src/ubox/ubox_get_tile.z80
new file mode 100644
index 0000000..49dcb30
--- /dev/null
+++ b/src/ubox/ubox_get_tile.z80
@@ -0,0 +1,28 @@
+.globl _ubox_get_tile
+
+RDVRM = 0x004a
+
+_ubox_get_tile::
+ ld hl, #2
+ add hl, sp
+
+ ld b, #0
+ ld c, (hl)
+ inc hl
+ ld l, (hl)
+
+ ld h, #0
+ add hl, hl
+ add hl, hl
+ add hl, hl
+ add hl, hl
+ add hl, hl
+ add hl, bc
+
+ ld bc, #0x1800
+ add hl, bc
+
+ call RDVRM
+ ld l, a
+ ret
+