stuttering output on the tty?

[csh...@gmail.com]

Greetings all!  New builder here.  Just finished my kit this weekend.  I'm on the old firmware, my kit arrived in September.

Everything went well with my build and the machine is up!   I've toggled in my first chaser-light program... configured the machine to boot into cpm... and ran Zork!

As far as I can tell, everything is functional.  But I do notice that the virtual tty frequently stutters.  Like it's buffering... or the machine is lagging... or theres a GC running... it's very strange.  The lights on the front panel don't seem to be affected... so I'm not 100% sure if this is a problem in the javascript the virtual tty... or actually something wrong with the machine.

I've turned on full logging to the console physical USB, plenty of info... but there's no smoking gun.

I don't think it's flow control because the machine is still completely stock. I've not changed anything yet other than the NVS.  

Anybody else seen anything like this?  Rogue-vt seems particularly affected.  When running in unlimited speed, it's much better.  (Which doesn't make me feel any better).

Thanks much!

-C.

[TheHighNibble]

• or theres a GC running

The only thing running GC is JavaScript on your browser, so not likely.

It does beg the question: what browser, on what OS, on what hardware are you running your browser?

Only Chrome is tested/supported and that's on Win, macOS, Linux. Chromium on PiOS, no.

More likely you are experiencing the "weak" Wi-Fi of the ESP32.

Are you running in AP or STA mode? Some people find AP is fine but when they switch to STA it causes problems, others find the opposite.

For example, I can't use AP mode at my work because there is so much Wi-Fi congestion. But if I set my phone up as a hot-spot I can run in STA mode, but have some problems like you describe. The same system works fine at my home in both AP or STA mode.

There are two parameters you can add to you boot.conf file to experiment with:

• WIFI.sta.scan=1 described on the forum in a few posts eg. https://groups.google.com/g/imsai8080esp/c/WYIshQ-5TM8/m/dcZBDoKuBwAJ
• TTY.netsrv.buffer_delay=33 documented here: https://thehighnibble.com/imsai8080/configure/#performance-parameters

 Let me know how you get on.