diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 02fcccaa..7551c2fd 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -27,6 +27,7 @@ jobs:
           #   platformio-path: ~\AppData\Local\platformio\Cache
         board:
           [
+            generic.h,
             ebox.h,
             eboxtube.h,
             ecopower.h,
diff --git a/src/hal/generic.h b/src/hal/generic.h
index ef691330..c753ba8d 100644
--- a/src/hal/generic.h
+++ b/src/hal/generic.h
@@ -62,7 +62,7 @@
 
 #define CFG_sx1276_radio 1 // select LoRa chip
 //#define CFG_sx1272_radio 1 // select LoRa chip
-#define BOARD_HAS_PSRAM // use if board has external PSRAM
+//#define BOARD_HAS_PSRAM // use if board has external SPIRAM, note: this will reduce IRAM0 by 64KB for SPIRAM cache
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_DISPLAY 1
diff --git a/src/hal/m5fire.h b/src/hal/m5fire.h
index 81f35454..c4e25e1d 100644
--- a/src/hal/m5fire.h
+++ b/src/hal/m5fire.h
@@ -1,6 +1,7 @@
 // clang-format off
 // upload_speed 921600
-// board m5stack-fire
+// board m5stack-core-esp32
+// b0ard m5stack-fire -> does not compile due to IRAM0 shortage, because 64KB of 192KB used for caching external SPIRAM
 
 // note use of GPIO16/17
 // https://www.bjoerns-techblog.de/2019/03/m5stack-fire-eine-uebersicht/
@@ -31,9 +32,7 @@
 #define DISABLE_BROWNOUT 1 // comment out if you want to keep brownout feature
 
 #define HAS_LED NOT_A_PIN // no on board LED (?)
-#define RGB_LED_COUNT 10
-
-#define RGB_LED_COUNT 1 // we have 1 LED
+#define RGB_LED_COUNT 10 // M5fire has a stripe of 10 RGB Pixels
 #define HAS_RGB_LED FastLED.addLeds<SK6812, GPIO_NUM_15, GRB>(leds, RGB_LED_COUNT);
 #define HAS_BUTTON (39) // on board button A