ESP32 Port

[MockbaTheBorg]

My ESP32 boards will be arriving in a few days.
Let's see if this is going to work right out of the box, or if it will require a lot of coding to happen.
Or even if it will not be at all possible.
Stay tuned.

[drawkula]

The file operations routines won't work without changes.
Or my installed Arduino ESP32 stuff isn't configured correctly.

I'm waiting for the next ESP32 boards (I've ordered more than one on the same day) because I cannot use the 1st one that arrived until the dispute with the seller has been solved: $THEY sent me a different (and cheaper) type of board than advertised. So far I opened the package only for taking photos.

[MockbaTheBorg]

YAY!

The cool part is: Version 3.2 coincides with (preliminary) ESP32 support ... :)

[MockbaTheBorg]

Now off to extensive testing ... the thing seems to not have (at least with no code changes) support to analogWrite.
Also, it runs at 80MHz, a bit slow, but I saw somewhere it can be heavily overclocked, though I have no idea how to do it yet.
Fun times lie ahead.

[drawkula]

AnalogWrite still is broken in this Arduino core.

https://github.com/espressif/arduino-esp32#development-status mentiones:

Most of the framework is implemented. Most noticable is the missing analogWrite.

And PSRAM is said to be slower than the internal RAM. Can it be disabled?

Where did you hide mySD.h?

Also, it runs at 80MHz, a bit slow, but I saw somewhere it can be heavily overclocked, though I have no idea how to do it yet.

It should be faster: https://www.espressif.com/sites/default/files/documentation/esp32_datasheet_en.pdf#14

How do I run at 160 or 240MHz? #487

[MockbaTheBorg]

mySD went inside Documents/Arduino/mySD folder

Looks like it is always running at 240MHz? I have a feeling that it runs slower than the Teensy.
Gotta run more tests.
The DUE, poor DUE, got left behind.

The PSRAM can be disabled on the board configuration of the Arduino GUI.

[MockbaTheBorg]

Now ... I think we should implement BDOS calls to make use of the other functionalities of the ESP32, like BlueTooth, WiFi and Real Time Clock.

[drawkula]

I've no idea where mySD.h hides. This line should find it indepently of upper/lower-case usage. No output, no file... :-(

(yeti@kumari:25)/home/wrk/runcpm/src/RunCPM$ find . -iname mysd.h

The good news: I got a refund for the wrongly delivered variant of the ESP32 board and don't need to send it back. Maybe I'll find time to test it tomorrow. If I get `mySD.h` from somewhere... :-)

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Found mySD.h!
I expected it to be part of the it repo...

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Some update must have screwed up my $HOME/.arduino15/preferences.txt. I suddenly had a $HOME/Arduino folder additionally to my $HOME/wrk/arduino/sketchbook. Not expecting this, it took a while to notice $HOME/Arduino and to fix $HOME/.arduino15/preferences.txt. Now RunCPM.ino finds the SD card library and compiles. Looking for a SD card breakout and test run will need to wait until tomorrow.

[MockbaTheBorg]

Cool ... keep me posted.
I have added some website references to RunCPM's readme.

[drawkula]

The Board is labeled ESP32 DEVKITV1.
There is no vendor name like NodeMCU, DOIT, Lolin or such.

It has the 2 rows with 15 pins pinout and uses an ESP-WROOM-32 (so no PSRAM).

Unluckily it only leaves 1 row of holes on a breadboard so I wired a fullsize SD card socket directly to it using F/F jumper wires.

It is only a socket, no resistors or other stuff is included.

I'll rethink that when the next types of boards arrive.

The first in action snapshot using a "Hackaday amber" XTerm:

[MockbaTheBorg]

I am starting to think about a new BDOS call (243 I think) for supporting the ESP32.
We would build a record on 0x80 with more information about what the calls does, it can be wifi, BT, RTC, then call BDOS 243 to make it happen. So it would be a single BDOS entry for ESP32 support.

[drawkula]

For some stuff, the buffer at 0x80 will not be large enough (e.g. when doing something with longer URLs) but then a pointer to a string could be dropped there instead of the whole URL.
A way to get software directly from the net would be like magic... \o/
Being able to save/backup stuff via WLAN would be nice too!

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But now for somethig completely different:

Are you planning to mention RunCPM/ESP32 in /r/ESP32, /r/CPM, Hackaday, ...

New users may have new ideas too... :-D

[MockbaTheBorg]

My idea is that the 0x80 buffer would be only for passing one byte with the "sub-call" ID and multiple pointers to the data to be sent/received. Then a C program could allocate whatever memory and go from there.
And yes, definitely a "DOWNLOAD.COM", which we could call to download files from the network.
The possibilities are infinite (which is a number around 65536).

[MockbaTheBorg]

Now, regarding social network ... lol ... I suck at these ... I avoid going to forums and suck to promote the software because I would then have no time to follow up.
RunCPM in on hackaday, I go there maybe every 6 months only. 😄