diff --git a/CONFIG.md b/CONFIG.md
index 53ad6421..c1f56871 100644
--- a/CONFIG.md
+++ b/CONFIG.md
@@ -74,6 +74,10 @@ Choose if your CPU supports the Commodore Semiconductor Group 65CE02 instruction
 
 It enables some speed/size code optimizations.
 
+### `CONFIG_CPU_M65_45GS02`
+
+Choose if you have a Mega65 FPGA board.
+
 ### `CONFIG_CPU_WDC_65816`
 
 Choose if your CPU supports the 16-bit Western Design Center 65816 instruction set, like:
diff --git a/c64/,,config_custom.s b/c64/,,config_custom.s
index 192d682a..95bfda75 100644
--- a/c64/,,config_custom.s
+++ b/c64/,,config_custom.s
@@ -33,6 +33,7 @@
 #define CONFIG_CPU_MOS_6502
 // #define CONFIG_CPU_WDC_65C02
 // #define CONFIG_CPU_CSG_65CE02
+// #define CONFIG_CPU_M65_45GS02
 // #define CONFIG_CPU_WDC_65816
 
 
diff --git a/c64/,,config_generic.s b/c64/,,config_generic.s
index 84cd3ea7..4195ef46 100644
--- a/c64/,,config_generic.s
+++ b/c64/,,config_generic.s
@@ -30,6 +30,7 @@
 #define CONFIG_CPU_MOS_6502
 // #define CONFIG_CPU_WDC_65C02
 // #define CONFIG_CPU_CSG_65CE02
+// #define CONFIG_CPU_M65_45GS02
 // #define CONFIG_CPU_WDC_65816
 
 
diff --git a/c64/,,config_mega65.s b/c64/,,config_mega65.s
index 99a7306c..07259720 100644
--- a/c64/,,config_mega65.s
+++ b/c64/,,config_mega65.s
@@ -29,7 +29,8 @@
 
 // #define CONFIG_CPU_MOS_6502
 // #define CONFIG_CPU_WDC_65C02
-#define CONFIG_CPU_CSG_65CE02
+// #define CONFIG_CPU_CSG_65CE02
+#define CONFIG_CPU_M65_45GS02
 // #define CONFIG_CPU_WDC_65816
 
 
diff --git a/c64/,,config_testing.s b/c64/,,config_testing.s
index a3c38560..0f7a164f 100644
--- a/c64/,,config_testing.s
+++ b/c64/,,config_testing.s
@@ -30,6 +30,7 @@
 #define CONFIG_CPU_MOS_6502
 // #define CONFIG_CPU_WDC_65C02
 // #define CONFIG_CPU_CSG_65CE02
+// #define CONFIG_CPU_M65_45GS02
 // #define CONFIG_CPU_WDC_65816
 
 
diff --git a/c64/,,config_ultimate64.s b/c64/,,config_ultimate64.s
index 07a981c0..f2927c60 100644
--- a/c64/,,config_ultimate64.s
+++ b/c64/,,config_ultimate64.s
@@ -30,6 +30,7 @@
 #define CONFIG_CPU_MOS_6502
 // #define CONFIG_CPU_WDC_65C02
 // #define CONFIG_CPU_CSG_65CE02
+// #define CONFIG_CPU_M65_45GS02
 // #define CONFIG_CPU_WDC_65816
 
 
diff --git a/c64/aliases/,aliases_config.s b/c64/aliases/,aliases_config.s
index 4a375175..cfb0a39c 100644
--- a/c64/aliases/,aliases_config.s
+++ b/c64/aliases/,aliases_config.s
@@ -88,6 +88,9 @@
 #if CONFIG_CPU_CSG_65CE02
 	.eval selected++
 #endif
+#if CONFIG_CPU_M65_45GS02
+	.eval selected++
+#endif
 #if CONFIG_CPU_WDC_65816
 	.eval selected++
 #endif
diff --git a/c64/aliases/,aliases_cpu.s b/c64/aliases/,aliases_cpu.s
index 023e7558..3e44405c 100644
--- a/c64/aliases/,aliases_cpu.s
+++ b/c64/aliases/,aliases_cpu.s
@@ -8,7 +8,7 @@
 	#define HAS_OPCODES_65C02
 #endif
 
-#if CONFIG_CPU_CSG_65CE02
+#if CONFIG_CPU_CSG_65CE02 || CONFIG_CPU_M65_45GS02
 	#define HAS_OPCODES_65CE02
 #endif
 
@@ -17,7 +17,7 @@
 #endif
 
 
-#if CONFIG_CPU_WDC_65C02 || CONFIG_CPU_CSG_65CE02 || CONFIG_CPU_WDC_65816
+#if CONFIG_CPU_WDC_65C02 || CONFIG_CPU_CSG_65CE02 || CONFIG_CPU_M65_45GS02 || CONFIG_CPU_WDC_65816
 	#define HAS_BCD_SAFE_INTERRUPTS
 #endif