STM32 Port about runcpm HOT 9 CLOSED

Port complete.

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Tried this one as well: https://github.com/stm32duino/Arduino_Core_STM32
No luck so far.

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I was able to port RunCPM to the STM32F4DISCOVERY board.
It is still unstable, but with promising results.
The steps to implement are:

1 - Install Arduino STM32 core from https://github.com/stm32duino/Arduino_Core_STM32 via the package manager.
2 - Install FatFs and STM32SD libraries via the library manager.
3 - Edit the stm32f4xx_hal_conf.h file for the board and uncomment #define HAL_SD_MODULE_ENABLED
4 - Edit the ffconf_default_68300.h file from the STM32SD library and set #define _FS_TINY 1
5 - Build, install.
6 - Plug a serial adapter to PA2 (TX) and PA3 (RX)
7 - Press reset (black) button.

RunCPM should show the greeting.

At this point I am not 100% sure of the correct operation of the file system, so be aware that file corruption can occur.

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Further investigation leads me to think there's a memory leak on the SD card handling.
Multiple DIR commands lead to a crash ...

So far I was not able to replicate.

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STM32 board back to the drawer for now. Maybe I will revisit in the future if there's free time.

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Any tips for compiling for the STM32F411 Nucleo?

I have followed the instructions for setting up the discovery board (above)
and found/confirmed every settings change, but when I compile with 'Board Nucleo-64' and 'part number Nucleo F411RE', the compilation fails at "PD13 was not declared in this scope"..

#if defined _STM32_DEF_ // STM32 boards
  SdFatSoftSpiEX<PC8, PD2, PC12> SD; // MISO, MOSI, SCK
  #define SDINIT PC11 // CS
  #define LED PD13  <<<<<< 

Is this setup missing a pin definition file?

Thanks

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Working on the STM32F411 Nucleo!

STM code section below. Once running, the tty comes through the embedded ST-Link interface apparently fine and I can see the console in the Arduino IDE or using minicom.
See the note in the code about the SD card activity LED.

  #if defined _STM32_DEF_ // STM32 boards

    // Important note - Arduino IDE build options for Nucleo board:
    //   U(S)ART Support: Enabled (Generic 'Serial')
    //   USB Support (if available): CDC (no generic 'Serial')
    
    // F411RE uses MISO = PA6 (D12), MOSI = PA7 (D11), SCK = PA5 (D13) 
    // (See note about LED below), CS = PB6
    SdFatSoftSpiEX<PA6, PA7, PA5> SD; // MISO, MOSI, SCK
    #define SDINIT PB6 // F411RE uses CS = PB6 (D10)

   #define LED PA8 // STM32F411 Nucleo has an LED on PA5 (SCK), which will flash during SD access. 
                // Application-controlled LED now reassigned to a different
                // pin so we don't drive the SCK line. Stick an LED + resistor
                // on it if you want two LEDs for SD access! PA8 is Arduino pin D7

    #define LEDinv 0 // 0=normal 1=inverted
    #define BOARD "STM32F411 Nucleo"

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