# HG changeset patch
# User Michael Pavone <pavone@retrodev.com>
# Date 1700629276 28800
# Node ID ce9f5a42c4816e8203a7ae0a34c9605606ddca63
# Parent  03e6ac327ba05e874cf07aeaeeb660c647506d96
Ensure VDP double_res flag is updated when loading a save state

diff -r 03e6ac327ba0 -r ce9f5a42c481 vdp.c
--- a/vdp.c	Tue Nov 21 20:47:11 2023 -0800
+++ b/vdp.c	Tue Nov 21 21:01:16 2023 -0800
@@ -144,6 +144,10 @@
 	}
 	context->border_top = calc_crop(top_crop, border_top);
 	context->top_offset = border_top - context->border_top;
+	context->double_res = (context->regs[REG_MODE_4] & (BIT_INTERLACE | BIT_DOUBLE_RES)) == (BIT_INTERLACE | BIT_DOUBLE_RES);
+	if (!context->double_res) {
+		context->flags2 &= ~FLAG2_EVEN_FIELD;
+	}
 }
 
 static uint8_t static_table_init_done;
@@ -4646,12 +4650,6 @@
 		uint8_t buffer[2] = {reg, value};
 		event_log(EVENT_VDP_REG, context->cycles, sizeof(buffer), buffer);
 		context->regs[reg] = value;
-		if (reg == REG_MODE_4) {
-			context->double_res = (value & (BIT_INTERLACE | BIT_DOUBLE_RES)) == (BIT_INTERLACE | BIT_DOUBLE_RES);
-			if (!context->double_res) {
-				context->flags2 &= ~FLAG2_EVEN_FIELD;
-			}
-		}
 		if (reg == REG_MODE_1 || reg == REG_MODE_2 || reg == REG_MODE_4) {
 			update_video_params(context);
 		}