From c8f47d8a0833afa96dd8501311f775bee5aadb25 Mon Sep 17 00:00:00 2001
From: Andrew Alderwick <andrew@alderwick.co.uk>
Date: Sun, 19 Sep 2021 22:53:45 +0100
Subject: [PATCH] Always return current PPU size when Screen/width,height is
 read

---
 src/uxnemu.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/uxnemu.c b/src/uxnemu.c
index 3cd5f2e..534fe7e 100644
--- a/src/uxnemu.c
+++ b/src/uxnemu.c
@@ -343,8 +343,12 @@ console_talk(Device *d, Uint8 b0, Uint8 w)
 static int
 screen_talk(Device *d, Uint8 b0, Uint8 w)
 {
-	if(!w)
-		return 1;
+	if(!w) switch(b0) {
+		case 0x2: d->dat[0x2] = ppu.width >> 8; break;
+		case 0x3: d->dat[0x3] = ppu.width; break;
+		case 0x4: d->dat[0x4] = ppu.height >> 8; break;
+		case 0x5: d->dat[0x5] = ppu.height; break;
+		}
 	else
 		switch(b0) {
 		case 0x3:
@@ -583,10 +587,6 @@ main(int argc, char **argv)
 	/* unused   */ uxn_port(&u, 0xe, nil_talk);
 	/* unused   */ uxn_port(&u, 0xf, nil_talk);
 
-	/* Write screen size */
-	poke16(devscreen->dat, 2, ppu.width);
-	poke16(devscreen->dat, 4, ppu.height);
-
 	run(&u);
 	quit();
 	return 0;