What speed z80? Anyone working on a gui? Ula+ ulax spectra vdac2?

I have a board with db9 and manhattan cable but can`t read with the shield, the arduino uno, etc. the board is ok, if I connect the manhattan cable to android phone with putty it does communicaet, but, the usb from the manhattan to the shield nothing happends

Nice tutorial! Where can I find the source code for the project?

The KIM-1 Computer needed only a few extra buttons to enter up to more then 65.535 memory addresses and data up to 255 decimal. Others in those times of early computing tried to save money by using ROM's as little as possible. But today there is no shortage in ROM. I was thinking about a different system of entering data and addresses, there are four seven segment LED displays, above these displays are four buttons, for up, underneath there are fout buttons for down. Then all the memory addresses can be typed in with only eight buttons. For data it is the same idea, two LCD displays, two buttons above, two buttons underneath. Furthermore there are buttons needed for Go and Store etc. It won't save money or time but I think is is less work then typing in all addresses and all data binary. Another idea would be, four cursor buttons, with left and right you choose one of the seven segment LED display, and with up and down you higher or lower the number.

I'm a few years late, but! Can I turn this around and code something that output simulated keyboard inputs to my computer? Basically some form of bot or tasker: Press spacebar every 30 seconds and send it to my PC.

Hello I love this it's so cool 👌. what black plastic name is don't matter? And if I want conect more modules for eg: 48x32 it's possible? and you can share schematic please, thanks

Hi how did you program the rom , i got z80 kit which waiting for a cpm software to run, do you have a step by step instructions to follow. Thanks.

Can I connect my USB Synthesizer to Arduino board by itto receive and send midi message ???

Thanks!

Hi man! Great video! I was trying to use my 16x2 LCD screen and it started to display some glitchy characters when I typed on the keyboard. Do you know a way to fix it? Thanks!

Hello There, I am very happy to find this video, I am trying to build a Z80 on a breadboard and is nice to find someone on the same path, I try to look at the website you gave but its apparently offline, would you have a copy of the schematics? thanks

Hi. You have done a very nice work. I have seen that new version of the TTGO/ESP32 adapter can use the mouse PS/2 port as a serial interface, and using that connector is possible sending power (5 volt) and connect directly the serial chip of the Z80 without voltage adapter.

For my project, the keyboard receives 5 volts but not enough current to power it. How do you ensure that the arduino provides enough power?

I think you did a tidy job. The case could have been smaller yet maintained the same aesthetic. You made me laugh with "bee-zulls" 🙂 They sound cute.

When I try to visit your website I see an error. I hope your website comes back soon.

This is a bit off-topic, but... I'm wondering... did the ZX Spectrum have any kind of CP/M or DOS (aside from TR-DOS)?

Can you please share the schematic for your MC14490 board? I am attempting to use the datasheet and doing something to blow out the ICs when I hook them up.

When I was first fiddling around with alternative CCPs I wrote a couple of utilities GETCCP and PUTCCP which read/write the CCP to the boot tracks from a specified file. (I also wrote GET/PUT BDOS and BIOS as well to complete the set.)

I want to control my Usb Webcam using arduino uno. Is that possible? My pc webcam is A4tech

how to use the mouse with usb host shield and arduin?

Are playgrounds still available? I can't find your ebay anymore, and even your 8bitstack website seems to be no longer operational.. Even if just the gerber was available I'd be happy to cobble the rest together if that's the only option...

tyvm ^^

it's possible connect 2 USB shield?

can you share or link the Visual Studio Code json file and theme?

Upgrade the CCP??? 🤨

Z , not Zed.

do you have any idea of when the kits will be available?

Do you have your code hosted somewhere?

Hello, could you please provide me a source code?

Hey CB how can I get the Gerbers so I can get some boards fabbed ?

looks very promising! However, it's sold out? Any update about availability?

so cool and helpful!

Hi. Is the FAT implementation code somewhere available?

The subtract with borrow is done so the ALU doesn't have to compute the full two's complement. It only inverts the bits and then the adder adds the value of the carry to get the correct result. If you look at the 6502's ALU design it works identically.

Nice work. Awesome that you fired up Sargon! Good video out.

Thanks for the video. Very helpful. I'm having a little trouble with the coding side of things. I'm hoping just to send the keyboard characters to display on the serial monitor. Do you have your sample code available to download anywhere?

What if you want to connect more than one usb device to the arduino do you have to use more usb hosts?

Which specific plug-ins are you using? There seem to be quite a few for the Z80.

Great project. What's the most recent status?

I bought a USB host shield and soldered it myself. There was no power at all I tried to charge my phone with it, plug in my mouse, etc. Then I bought a pre-soldered one from ebay and the solder looks good. No power either. Trying this on an Arduino Leonardo

It is posible connect a USB extension to be able use a mouse and a key??

I like you generic debug & test boards...

This was a good video. I need to enter numeric input to a CNC morticing jig I developing, and I tried using a 4x4 keypad but it wasn't going so well so I thought I'd give a usb keyboard. Will this work? Thank you,

The UART should be raising an interrupt when it's buffer has some data in it. That way you'd read it in time. Using RTS means the UART is saying hold on my CPU is having a tea break.

Easier to add an SD card because they use a simple serial clocked data transfer. You can bit bang it.

Wonderful sharing!

you can also use a 3v3 Pro Micro, and build a USB-to-USB protocol adapter, see kzfaq.info/get/bejne/q5-IlMhnxtq2eqM.html

do you have compnent list for this project