Z80 Emulation Using the RP2040

[MicroNut]

Here's an update RunCPM

The wifi.cfg has changed
TELNET_PORT Now you can set the port. It defaults to 23

CONNECT_TIMEOUT_MS
Negative (-1) Does not fallback into the AP Just looks for STA
0 Immediately goes to the fallback AP
xxxx timeout in milliseconds before going to the fallback AP

Has anyone tried this with the Pico 2W? Once I confirm that works I'll put it up on Github

This has been an interesting project. My workplace has recently subscribed to ChatGPt so this has been a learning experience for me. It did well on this project but the one at work I'm using it on is being very difficult. You can't rely on AI 100%.

[granz]

Unfortunately, I have not been able to do anything this week (not even my hobby stuff.) On Monday, I went to the acupuncturist and after the treatment, I was in so much pain that I could not even complete my exercises or walking. When I got done, I could not even go out in the hall to get my wheelchair - the nurse had to get it for me. The whole week I could not walk around in my house without my walker - normally I will often leave it at one end of my house, and walk around without it like I did at our meetup. No more acupuncture for me.

I am just getting to be able to walk without the walker today. Hopefully I will be able to get started on some of my stuff next week.

[MicroNut]

I hope you get better soon.

[granz]

Thank you. Yesterday, I was feeling much better (still not great, but better.) Today, it seems that my back has taken a step backwards. Hopefully once I get moving the pain will ease up a bit.

[Chris Savage]

Feel better, granz! We need ya in good shape! 

[granz]

Feel better, granz! We need ya in good shape! 

Thanks, I am feeling much better, although yesterday was so painful that Marilyn thought that we might need to leave church before service.

This morning, I was able to do my exercises, and my morning walk, again. I had to reduce my reps to 10 (from 15 before my troubles,) but I was able to get them done. My physical therapist gave me a few more exercises on Friday, but I'm holding off on adding them for now.

[granz]

I still think that the Pico with RunCPM will be the best deal:

Amazon:

• SD Card Breakout (2 ea) - $5.49 - https://www.amazon.com/DIYables-Adapter-Arduino-ESP8266-Raspberry/dp/B0BXKLNN2L
• Raspberry Pi Pico H w/ USB Cable - $9.90 - https://www.amazon.com/Microcontroller-Development-Pre-Soldered-Dual-Core-Multi-Function/dp/B0DSBQS5ZF/
• 830 Point Breadboard - $4.59 - https://www.amazon.com/California-JOS-Breadboard-Solderless-Distribution/dp/B0BRQX6G3T/
• 1 GB Micro SD Card - $7.79 - https://www.amazon.com/Lerdisk-Wholesale-1GB-Produced-Authorized/dp/B0D3KWY34B
• Hookup Wire - $3.86 - https://www.amazon.com/MECCANIXITY-Breadboard-Electronics-Electronic-Projects/dp/B0F1YDQ53Q

Total - $31.63 + sales tax
No shipping fee for Prime Members.
Price could be considerably less for someone who can solder.
No soldering, nothing else to purchase.
RunCPM firmware is a single file that is extremely easy to install on the Pico - great for complete beginner.

I now have one of the RP2350-GEEK devices, from Amazon, on its way - should be here Friday.

It appears that the RP2040-GEEK (https://www.amazon.com/dp/B0CGLBLQ43) device is actually cheaper ($17.39 w/ S&H + SD card,) than the above kit. This will be cheaper, easier and faster for a complete beginner than the kit that I sourced out.

One of the RP2040-GEEK modules is now on order (unfortunately long shipping time - 1 May - 11 May. ) I will install the RunCPM for that module when it arrives.

There is one other option that I have been considering. The Adafruit Feather RP2040 Adalogger (https://www.adafruit.com/product/5980) with a cheap 512 MB SD card is only $19.90. The shipping to my place, near Pittsburgh) is (USPS - Ground Advantage) $5.53. This would be just over $25 delivered (here.) That would cover everything in the above kit, except for the SD card - the same as the RP2040-GEEK. The -GEEK module wins by being a bit cheaper and by including a case (plus the LCD, but that would not be used for this project.) The Adalogger should get delivered sooner - Adafruit is pretty good about shipping in my experience.

Sorry about being slow on this, the pain has been pretty bad lately. I could not even get to church this past Sunday, and I was the scheduled deacon for reading the Scripture and praying. This pain is a pain.