From 6845008fd43c4ee65340ab3ce3f103ffeb24d37e Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 7 Mar 2023 22:12:06 -0500
Subject: [PATCH] Place end-of-frame interrupt appropriately.

---
 Components/9918/Implementation/9918.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Components/9918/Implementation/9918.cpp b/Components/9918/Implementation/9918.cpp
index 9c6bc79f4..0cfe5b125 100644
--- a/Components/9918/Implementation/9918.cpp
+++ b/Components/9918/Implementation/9918.cpp
@@ -795,6 +795,9 @@ void Base<personality>::commit_register(int reg, uint8_t value) {
 
 			case 9:
 				mode_timing_.pixel_lines = (value & 0x80) ? 212 : 192;
+				mode_timing_.end_of_frame_interrupt_position.row = mode_timing_.pixel_lines+1;
+				// TODO: on the Yamaha, at least, tie this interrupt overtly to vertical state.
+
 				LOG("TODO: Yamaha line count, interlace, etc; " << PADHEX(2) << +value);
 				// b7: 1 = 212 lines of pixels; 0 = 192
 				// b5 & b4: select simultaneous mode (seems to relate to line length and in-phase colour?)