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Author Topic: ESP8266 (Read 438 times)

Offline BruceTanner

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ESP8266
« on: 2017.March.25. 19:46:41 »
Somebody has got a Z80 emulator running on an ESP8266.

http://hackaday.com/2017/03/25/cpm-8266/

Now where could we go from here... :shock:
« Last Edit: 2017.March.26. 08:33:48 by BruceTanner »

Online gflorez

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Re: ESP8266
« Reply #1 on: 2017.May.22. 14:09:48 »
On this thread of the Spanish web page Retrowiki, a guy has successfully connected several microcomputers to an ESP8266 WIFI module to try BBSs.

One of them is a BBC computer, connected through a RS423 serial port like the Enterprise has infra-utilised. 

I will try to do the same...

Offline BruceTanner

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Re: ESP8266
« Reply #2 on: 2017.May.22. 15:50:38 »
I also have a little ESP8266 project going on...to replace the WIZ ethernet module on EPNET with a pin-compatible module with an ESP8266 and xilinx CPLD containing VHDL for a fast UART and/or a SPI driver :shock:

Online lgb

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Re: ESP8266
« Reply #3 on: 2017.May.22. 17:09:38 »
Just to note: I don't know details, but the ZX Spectrum Next project also seems like to use ESP8266, and it seems there is goal to write "Internet tools" as well. Among the "stretch goals" (the "dedicated developer"), but it seems the money is enough for that already and soon the 1 month of campaign is over:

https://www.kickstarter.com/projects/1835143999/zx-spectrum-next/

I just found that interesting, as they states the project will be open source, and even if it's a Spectrum project, it's still around the Z80.

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Re: ESP8266
« Reply #4 on: 2017.May.22. 21:37:43 »
The best for us is that the stock module comes with a firmware that emulates a modem, but it can be loaded with others, even a z80 emulator with CP/M...

There is an active Scene behind this module. Probably the Next will carry a modified firmware only for it.

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Re: ESP8266
« Reply #5 on: 2017.May.22. 21:56:36 »
The best for us is that the stock module comes with a firmware that emulates a modem, but it can be loaded with others, even a z80 emulator with CP/M...

There is an active Scene behind this module. Probably the Next will carry a modified firmware only for it.

I guess so, since somewhere I read that "reprogramming ESP8266 needs ..." or something like that. Anyway, it seems currently there is huge amount of project, code and doc on the module/chip itself, in contrast of its beginning when it was kinda a puzzle, especially to have only limited amount of info, and even that is in Chinese only ...

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Re: ESP8266
« Reply #6 on: 2017.May.23. 11:50:03 »
I will try to do the same...

Don't forget it runs at 3.3V! :cry: :roll:

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Re: ESP8266
« Reply #7 on: 2017.May.23. 12:07:00 »
I know. I will use this circuit to feed the Wi-Fi module:

17981-0


17982-1


And this to rearrange the serial lines:



The first test made by "Gatuso" on the Spanish Retrowiki page has been done on a BBC micro, that also has a RS423 serial port:



Only that the BBC has -5v to +5v signals whereas the Enterprise returns -5v to +7v if the reference line is used.
« Last Edit: 2017.May.23. 22:41:00 by gflorez »