micropython fixes and rgb matrix bug fix

Author: RetiredWizard

README.md

@@ -293,7 +293,7 @@ Thanks to the great work of **@bill88t**, starting with CircuitPython version 8.
 
 When CircuitPython boots on a microcontroller the pystack size can be set by the **CIRCUITPY_PYSTACK_SIZE** value in the settings.toml file. PyDOS comes with this value set to 4000. PyDOS will derive a maximum wildcard length based on this value that should be adequate in most cases, however if you find yourself using particuarly long file names you can increase this parameter value as needed. As you increase the pystack size the memory available for PyDOS to run will decrease slightly.
 
-*By the way, if you like PyDOS you'll probably also enjoy ljinux from https://github.com/bill88t/ljinux.* 
+*By the way, if you like PyDOS you'll probably also enjoy Beryllium OS from https://github.com/beryllium-org/OS  
 
 **CircuitPython install**
 

boot.py

@@ -62,7 +62,9 @@
         'Sparkfun SAMD51 Thing Plus with SAMD51J20A', 
         'XIAO nRF52840 Sense with NRF52840']
 
-    if implementation._machine in spcBoards:
+    if '_machine' in dir(implementation) and \
+       implementation._machine in spcBoards:
+
         boardNo = spcBoards.index(implementation._machine)
     else:
         boardNo = -1

matrix.py

@@ -54,7 +54,7 @@
     bit_depth = 4
     chain_across = 2
     tile_down = 2
-elif passedIn == '64x4w'
+elif passedIn == '64x4w':
     base_width = 64
     base_height = 64
     bit_depth = 4

mpython/boot.py

@@ -4,7 +4,9 @@
     'Sparkfun SAMD51 Thing Plus with SAMD51J20A', 
     'XIAO nRF52840 Sense with NRF52840']
 
-if implementation._machine in spcBoards:
+if '_machine' in dir(implementation) and \
+    implementation._machine in spcBoards:
+
     boardNo = spcBoards.index(implementation._machine)
 else:
     import os

setup.bat

@@ -53,6 +53,10 @@ rem if not errorlevel 0 echo copy /mpython/lib/optional/ws2812.py /lib/
 rem if not errorlevel 0 copy /mpython/lib/optional/ws2812.py /lib/
 if not errorlevel 0 copy /mpython/lib/optional/neopixel.* /lib/
 pexec envVars["_uname"] = implementation._machine
+if errorlevel 0 goto uname_set
+pexec import os
+pexec envVars["_uname"] = os.uname().machine
+:uname_set
 if not "%_uname%" == "Sparkfun SAMD51 Thing Plus with SAMD51J20A" goto skip_SAMD51
 if not exist /lib mkdir /lib
 copy /mpython/extFlash/lib/* /lib/