CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

ZX80 / ZX81 hardware and software offered for sale or swapping
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msch
Posts: 86
Joined: Sun May 19, 2013 11:39 pm

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by msch » Wed Nov 20, 2019 1:02 pm

Some extensions are very usefull, i.e. the Dataflash to store programs or the memory extension, the Printer connector, the serial interface.
Maybe it is possible to design a pcb with most/all options onboard and the user can decide (via jumperfield?) which option he will finally use / or which parts he will populate.
I think the costs of the pcb is not the critical part... our friends in asia offer a lot of cheap possibilities. ;-)
Only a suggestion ...
Mathias

ZX-Team, classic computer collector

neazoi
Posts: 38
Joined: Sun Feb 20, 2011 1:59 am

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by neazoi » Wed Nov 20, 2019 1:28 pm

msch wrote:
Wed Nov 20, 2019 1:02 pm
Some extensions are very usefull, i.e. the Dataflash to store programs or the memory extension, the Printer connector, the serial interface.
Maybe it is possible to design a pcb with most/all options onboard and the user can decide (via jumperfield?) which option he will finally use / or which parts he will populate.
I think the costs of the pcb is not the critical part... our friends in asia offer a lot of cheap possibilities. ;-)
Only a suggestion ...
That is what I have thought initially. In fact, there are lots of unused pads already on the PCB just for this. For example, there is no composite video connector, but there is a pad on the PCB where you can solder a cable and an RCA connector to get, grayscale composite video out of it.
Want to hear a funny story?
When I sent the PCBs for fabrication these companies did 10x10 panels, so I thought if I squeeze two CB2 micros in this 10x10 panel, I could half the cost, which would make the KIT cheaper for people too. You can't imagine how many of these decisions one has to take if he has to cut down the cost without cut down features!
There are well thought KITS of course and also not well thought :)

neazoi
Posts: 38
Joined: Sun Feb 20, 2011 1:59 am

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by neazoi » Thu Nov 21, 2019 8:50 am

neazoi wrote:
Fri Nov 08, 2019 10:58 pm
I am now testing these:
https://www.aliexpress.com/item/32858555968.html
These should do the conversion fine
I can confirm that this converter is working fine on my setup (numerous homecomputers).

This one is technical the same:
ligawo-scart-hdmi.jpg
I have another (from 2011) converter that I tested yesterday with a Robotron KC87 RGB-SCART-Cable:
IMG_3612.JPG
IMG_3613.JPG
IMG_3614.JPG
It is working like a charm.

neazoi
Posts: 38
Joined: Sun Feb 20, 2011 1:59 am

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by neazoi » Sun Dec 01, 2019 12:48 am

Hi,
I have made progress on the LAN networking for the CB2 micros. See here
http://cb2.qrp.gr/extensions/index.html ... ea_Network
Networking works as designed!

I am going to test the rest of the cases but it's really fun to see all the computers in the LAN to communicate to each other!

Have fun

neazoi
Posts: 38
Joined: Sun Feb 20, 2011 1:59 am

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by neazoi » Sun Jan 05, 2020 5:26 pm

Hi,
I have just completed all the networking scenarios for the CB2 micro.
In this last example http://cb2.qrp.gr/extensions/#3.2.4_Con ... icros_a_PC three CB2 micros are connected together with a PC and a dial-up modem in the same network and sharing data.
Enjoy!
Attachments
DSC01927.JPG

neazoi
Posts: 38
Joined: Sun Feb 20, 2011 1:59 am

Re: CB2 micro KIT - Build your own BASIC color microcomputer within 30 minutes.

Post by neazoi » Tue Jan 28, 2020 12:47 pm

CB2 micro KIT unboxing by Dave (eevblog)

https://www.youtube.com/watch?v=jgp5BOQEeAs

Thanks Dave!

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