From 5d837313e56d19cd6ecfa2ad9746edca20afb5f6 Mon Sep 17 00:00:00 2001
From: Devine Lu Linvega <aliceffekt@gmail.com>
Date: Tue, 14 Jun 2022 10:47:52 -0700
Subject: [PATCH] Added warning for incompatible emulator devices

---
 src/uxn11.c  | 4 ++++
 src/uxncli.c | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/src/uxn11.c b/src/uxn11.c
index 14677fb..0c3ee10 100644
--- a/src/uxn11.c
+++ b/src/uxn11.c
@@ -33,6 +33,7 @@ static Window window;
 
 char *rom_path;
 
+#define SUPPORT 0x1f07 /* devices mask */
 #define WIDTH (64 * 8)
 #define HEIGHT (40 * 8)
 
@@ -79,6 +80,7 @@ static void
 emu_deo(Uxn *u, Uint8 addr, Uint8 v)
 {
 	Uint8 p = addr & 0x0f, d = addr & 0xf0;
+	Uint16 mask = 0x1 << (d >> 4);
 	u->dev[addr] = v;
 	switch(d) {
 	case 0x00:
@@ -91,6 +93,8 @@ emu_deo(Uxn *u, Uint8 addr, Uint8 v)
 	case 0xa0: file_deo(0, u->ram, &u->dev[d], p); break;
 	case 0xb0: file_deo(1, u->ram, &u->dev[d], p); break;
 	}
+	if(p == 0x01 && !(SUPPORT & mask))
+		fprintf(stderr, "Warning: Incompatible emulation, device: %02x.\n", d >> 4);
 }
 
 static void
diff --git a/src/uxncli.c b/src/uxncli.c
index edf0104..b64bb3f 100644
--- a/src/uxncli.c
+++ b/src/uxncli.c
@@ -17,6 +17,8 @@ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 WITH REGARD TO THIS SOFTWARE.
 */
 
+#define SUPPORT 0x1c03 /* devices mask */
+
 static int
 emu_error(char *msg, const char *err)
 {
@@ -59,6 +61,7 @@ static void
 emu_deo(Uxn *u, Uint8 addr, Uint8 v)
 {
 	Uint8 p = addr & 0x0f, d = addr & 0xf0;
+	Uint16 mask = 0x1 << (d >> 4);
 	u->dev[addr] = v;
 	switch(d) {
 	case 0x00: system_deo(u, &u->dev[d], p); break;
@@ -66,6 +69,8 @@ emu_deo(Uxn *u, Uint8 addr, Uint8 v)
 	case 0xa0: file_deo(0, u->ram, &u->dev[d], p); break;
 	case 0xb0: file_deo(1, u->ram, &u->dev[d], p); break;
 	}
+	if(p == 0x01 && !(SUPPORT & mask))
+		fprintf(stderr, "Warning: Incompatible emulation, device: %02x.\n", d >> 4);
 }
 
 int