Setting the stage for link device

makefile

@@ -1,5 +1,5 @@
 
-CLI_src=src/uxn.c src/devices/system.c src/devices/console.c src/devices/file.c src/devices/datetime.c
+CLI_src=src/uxn.c src/devices/system.c src/devices/console.c src/devices/file.c src/devices/datetime.c src/devices/link.c
 EMU_src=${CLI_src} src/devices/screen.c src/devices/controller.c src/devices/mouse.c
 
 RELEASE_flags=-DNDEBUG -O2 -g0 -s
@@ -29,6 +29,6 @@ clean:
 bin/uxnasm: src/uxnasm.c
 	@ cc ${RELEASE_flags} src/uxnasm.c -o bin/uxnasm
 bin/uxncli: ${CLI_src} src/uxncli.c
-	@ cc ${RELEASE_flags} ${CLI_src} src/uxncli.c -o bin/uxncli
+	@ cc ${RELEASE_flags} ${CLI_src} src/uxncli.c -pthread -o bin/uxncli
 bin/uxn11: ${EMU_src} src/uxn11.c
-	@ cc ${RELEASE_flags} ${EMU_src} src/uxn11.c -lX11 -o bin/uxn11
+	@ cc ${RELEASE_flags} ${EMU_src} src/uxn11.c -lX11 -pthread -o bin/uxn11

src/devices/link.c

@@ -0,0 +1,27 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+
+#include "../uxn.h"
+
+/*
+Copyright (c) 2023 Devine Lu Linvega
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE.
+*/
+
+Uint8
+link_dei(Uxn *u, Uint8 addr)
+{
+	return 0;
+}
+
+void
+link_deo(Uint8 *ram, Uint8 *d, Uint8 port)
+{
+}

src/devices/link.h

@@ -0,0 +1,17 @@
+/*
+Copyright (c) 2022 Devine Lu Linvega, Andrew Alderwick
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE.
+*/
+
+#define LINK_VERSION 1
+#define LINK_DEIMASK 0x0000
+#define LINK_DEOMASK 0xaaaa
+
+Uint8 link_dei(Uxn *u, Uint8 addr);
+void link_deo(Uxn *u, Uint8 *d, Uint8 port);

src/devices/system.c

@@ -89,7 +89,8 @@ system_version(Uxn *u, char *name, char *date)
 }
 
 void
-system_boot(Uxn *u, int soft){
+system_boot(Uxn *u, int soft)
+{
 	int i;
 	for(i = 0x100 * soft; i < 0x10000; i++)
 		u->ram[i] = 0;

src/uxn11.c

@@ -15,6 +15,7 @@
 #include "devices/mouse.h"
 #include "devices/file.h"
 #include "devices/datetime.h"
+#include "devices/link.h"
 
 /*
 Copyright (c) 2022 Devine Lu Linvega
@@ -70,6 +71,7 @@ emu_deo(Uxn *u, Uint8 addr)
 	case 0x20: screen_deo(u->ram, &u->dev[d], p); break;
 	case 0xa0: file_deo(0, u->ram, &u->dev[d], p); break;
 	case 0xb0: file_deo(1, u->ram, &u->dev[d], p); break;
+	case 0xf0: link_deo(u, &u->dev[d], p); break;
 	}
 }
 

src/uxncli.c

@@ -6,6 +6,7 @@
 #include "devices/console.h"
 #include "devices/file.h"
 #include "devices/datetime.h"
+#include "devices/link.h"
 
 /*
 Copyright (c) 2021-2023 Devine Lu Linvega, Andrew Alderwick
@@ -39,6 +40,7 @@ emu_deo(Uxn *u, Uint8 addr)
 	case 0x10: console_deo(&u->dev[d], p); break;
 	case 0xa0: file_deo(0, u->ram, &u->dev[d], p); break;
 	case 0xb0: file_deo(1, u->ram, &u->dev[d], p); break;
+	case 0xf0: link_deo(u, &u->dev[d], p); break;
 	}
 }