diff --git a/README.md b/README.md
index 1d06020..d1e0ec3 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ Since not any consumer (especially the Raspberry Pi) can act as an SPI slave thi
 
 * WPC95 & WPC -> 128x32
 * Data East -> 128x32
-* Sega -> 128x32
+* Sega -> 128x32 & 192x64
 * Stern Whitestar -> 128x32
 * Stern SAM -> 128x32
 * Stern SPIKE 1 -> 128x32
diff --git a/src/dmd_interface_sega_hd.pio b/src/dmd_interface_sega_hd.pio
index f3aadd5..eb7eb41 100644
--- a/src/dmd_interface_sega_hd.pio
+++ b/src/dmd_interface_sega_hd.pio
@@ -34,7 +34,7 @@ dotloop:
 ; Frame detection program runs in parallel to the reader program and signals the start of a new frame using an IRQ.
 .program dmd_framedetect_sega_hd
 .wrap_target
-    wait 1 gpio RDATA
     wait 0 gpio RDATA
+    wait 1 gpio RDATA
     irq FRAME_START_IRQ
 .wrap