TTGO ESP32 VGA32 v1.4

Install python-serial:

DEBIAN# apt-get install python3-serial
or
GENTOO# emerge dev-python/pyserial
or
PYTHON# pip install pyserial

Clone the repo makeEspArduino

cd ~/
mkdir src
git clone https://github.com/plerup/makeEspArduino.git

Clone the esp32 environment arduino-esp32

cd ~/src
git clone https://github.com/espressif/arduino-esp32.git  esp32
cd esp32
git checkout tags/2.0.8
git submodule update --init
cd tools
python3 get.py

Create core_version.h file (This file is required by some of the FabGL examples)

austin@mightymouse ~/src/esp32 $ cat /home/austin/src/esp32/cores/esp32/core_version.h
#define ARDUINO_ESP32_GIT_VER 0xd3254f75
#define ARDUINO_ESP32_GIT_DESC 2.0.8
#define ARDUINO_ESP32_RELEASE_2_0_8
#define ARDUINO_ESP32_RELEASE "2_0_8"

Clone the FabGL repo FabGL

cd ~/src
git clone https://github.com/fdivitto/FabGL.git

Compile and upload the sketch

make flash

Makefile

austin@mightymouse ~/src/FabGL/examples/VGA/PCEmulator $ cat Makefile
LIBS = /home/austin/src/FabGL/src
SKETCH = /home/austin/src/FabGL/examples/VGA/PCEmulator/PCEmulator.ino
UPLOAD_PORT = /dev/ttyACM0
CHIP = esp32
ESP_ROOT=/home/austin/src/esp32
include /home/austin/src/makeEspArduino/makeEspArduino.mk

PCEmulator also requires a code change to the sketch as v1.4 of the SBC uses slightly different pinout

diff --git a/examples/VGA/PCEmulator/PCEmulator.ino b/examples/VGA/PCEmulator/PCEmulator.ino
index 2154fc24..27bef0e5 100644
--- a/examples/VGA/PCEmulator/PCEmulator.ino
+++ b/examples/VGA/PCEmulator/PCEmulator.ino
@@ -388,7 +388,8 @@ void setup()
   esp_spiram_init_cache();
   #endif

-  if (!FileBrowser::mountSDCard(false, SD_MOUNT_PATH, 8))   // @TODO: reduce to 4?
+  //if (!FileBrowser::mountSDCard(false, SD_MOUNT_PATH, 8))   // @TODO: reduce to 4?
+  if (!FileBrowser::mountSDCard(false, "/SD", 8, 16*1024, 2, 12, 14, 13))
     ibox.message("Error!", "This app requires a SD-CARD!", nullptr, nullptr);

   // uncomment to format SD!

To edit the floppy disk images that are downloaded you can loopback mount like so:

mkdir imgmount
mount -o loop floppy_FREEDOS.img imgmount/

To edit the hdd images you need to include the offset:

mount -o loop,offset=32256 hd20_DOSPROG.img imgmount/