Hello, please can somebody help me this circuits cpu to connect with display and keyboard

michael1978 · Jun 28, 2019

gophert said:
Your circuit is a few boards full of empty sockets?

Hello Gophert, like i told you before...i say with my self(why i have to make, when i dont know for screen and i stop working i thought there is complete(man i did not know), but now i know...is PERFECT from the next(hope) i gonna start to finish ;-)))))
Have a Nice Wekend.... greetings

michael1978 · Jun 28, 2019

rjenkinsgb said:
You need spaces between the sockets - some IC bodies are too long to fit with the pins. Gaps are also useful as wiring "lanes" so the connections you add are not crossing other solder joints - or places you will need to add more connections to later.

Also you have all 18 pin 0.3" pitch, no allowing for the different size ICs.
You need to fully plan things and work out the exact IC types (and packages), plus allowing for other components, before you start building.

This is a practical example, though built with wire-wrap. There are decoupling capacitors under every IC, hidden inside the IC sockets.
The ICs are set out with reasonable spacing, on a ground-plane board to avoid electrical noise.

https://flic.kr/p/JHgJwf

Hello,
thank you very much for advice...there is two space because that was socket of 18(i think and i have 16 pins gates(but socket i did mistake), but no problem all party i gonna test(like i test in bredeboard)

Have Nice Wekeng...
greetings..

Pommie · Jun 28, 2019

This is a joke right?

Mike.

gophert · Jun 28, 2019

Pommie said:
This is a joke right?

Mike.

You haven't been following along? See posts 15, 18 and 23.

JimB · Jun 29, 2019

michael1978 said:
say with my self(why i have to make, when i dont know for screen and i stop working i thought there is complete(man i did not know), but now i know...is PERFECT from the next(hope) i gonna start to finish

I have no idea what that means.

Michael, this is an English speaking forum, it would help us to help you if you would write in a more standard form of English. Break the text into sentences and use some punctuation, rather than running all the words together.

We realise that English is probably not your first language, and most of us make allowance for that, but, when it takes more effort to decode the message than to fix the problem, then there are difficulties.

JimB

michael1978 · Jul 3, 2019

JimB said:
I have no idea what that means.

Michael, this is an English speaking forum, it would help us to help you if you would write in a more standard form of English. Break the text into sentences and use some punctuation, rather than running all the words together.

We realise that English is probably not your first language, and most of us make allowance for that, but, when it takes more effort to decode the message than to fix the problem, then there are difficulties.

JimB

Hello Jim
sorry for my late answer
man i am trying to translate in google, but he google dont translate correct.
i try my best to translate in english….
thanks man.

gophert · Jul 3, 2019

michael1978 said:
Hello Jim
sorry for my late answer
man i am trying to translate in google, but he google dont translate correct.
i try my best to translate in english….
thanks man.

Which language are you starting from?

michael1978 · Jul 8, 2019

gophert said:
Which language are you starting from?

I start from A ;-)
my language is kosovaar(albanian) and a little english and nederlands, i am al 20 year in Belgium and 20 year in Kosova

michael1978 · Jul 12, 2019

hello to everyone
i finish pcounter the circuit, now i am working in ALU
i just like to ask you
what comes after building the timing, counter, sync
have a nice wekend
greetings.

michael1978 · Jul 13, 2019

rjenkinsgb said:
You need spaces between the sockets - some IC bodies are too long to fit with the pins. Gaps are also useful as wiring "lanes" so the connections you add are not crossing other solder joints - or places you will need to add more connections to later.

Also you have all 18 pin 0.3" pitch, no allowing for the different size ICs.
You need to fully plan things and work out the exact IC types (and packages), plus allowing for other components, before you start building.

This is a practical example, though built with wire-wrap. There are decoupling capacitors under every IC, hidden inside the IC sockets.
The ICs are set out with reasonable spacing, on a ground-plane board to avoid electrical noise.

https://flic.kr/p/JHgJwf

hello

can you help me to finsh vga controller

i still did not finish, but i know how to make counter timing sync for vga controller.....
what i have to do next to finish the vga controller?

granddad · Jul 13, 2019

With every post this gets more interesting...

rjenkinsgb · Jul 13, 2019

michael1978 said:
can you help me to finsh vga controller

There is no VGA controller! VGA is one very specific type of video standard.

It uses a memory mapped pixel array. The whole design was only ever meant to be run in a software simulator and never built as a physical design.
The design uses a 512 x 256 pixel memory array, with bits directly controlling pixel on/off; no colour, no built-in text capability etc.

The overall design is not technically impossible to build but extremely impractical and there are far better and far more capable designs for self-build CPUs / computers around.

As I said from the start, if you are going to try and actually build that design, I (or other people) will give you general guidelines and provide information sources, but no one will just design the display circuitry for you; you need to learn enough to do it yourself, or chose a more practical design that has been proven to be suitable for a DIY system.

eg. Something like a DIY PDP-8 design is infinitely more practical; there is a mass of software that can run on those and an incredible amount of documentation overall, with user groups and excellent support.

michael1978 · Jul 13, 2019

rjenkinsgb said:
There is no VGA controller! VGA is one very specific type of video standard.

It uses a memory mapped pixel array. The whole design was only ever meant to be run in a software simulator and never built as a physical design.
The design uses a 512 x 256 pixel memory array, with bits directly controlling pixel on/off; no colour, no built-in text capability etc.

The overall design is not technically impossible to build but extremely impractical and there are far better and far more capable designs for self-build CPUs / computers around.

As I said from the start, if you are going to try and actually build that design, I (or other people) will give you general guidelines and provide information sources, but no one will just design the display circuitry for you; you need to learn enough to do it yourself, or chose a more practical design that has been proven to be suitable for a DIY system.

eg. Something like a DIY PDP-8 design is infinitely more practical; there is a mass of software that can run on those and an incredible amount of documentation overall, with user groups and excellent support.

hi man

ooh man, i just want to connect my cpu to screen, you told me first what to do, so i did i build the circuits what to do next?

rjenkinsgb · Jul 13, 2019

Hi
Have you already built the display RAM, an 8K x 16 bit dual-port system?

michael1978 · Jul 14, 2019

rjenkinsgb said:
Hi
Have you already built the display RAM, an 8K x 16 bit dual-port system?

Goodmorning
yes i did it, i goona show you.... and next what to do?

gophert · Jul 14, 2019

michael1978 said:
Goodmorning
yes i did it, i goona show you.... and next what to do?

Please post some photos...

michael1978 · Jul 27, 2019

hello, to be real i build one piece of alu 256 wires, where are the next 2 piece, plus other pieces.
it take me to much time but in post 9, the say you can build in FPGA, what you can do with fpga?
i see in internet somebody build in FPGA nand2tetris
can you help me what to learn, is new to me FPGA

michael1978 · Jul 27, 2019

rjenkinsgb said:
The design is not intended to be built with conventional components.

You would need a 8K word dual-port RAM setup and a full set of address counters/dividers to generate both video timing and memory addresses etc., then output each word to a shift register.
Not a simple design.
eg. https://www.idt.com/document/dst/7025-data-sheet

The whole "nand2tetris" design is really intended to be built as a logic design and programmed in to a gate array something like this:

XC3S50AN-4TQG144C AMD Xilinx | Integrated Circuits (ICs) | DigiKey

Order today, ships today. XC3S50AN-4TQG144C – Spartan®-3AN Field Programmable Gate Array (FPGA) IC 108 55296 1584 144-LQFP from AMD Xilinx. Pricing and Availability on millions of electronic components from Digi-Key Electronics.

www.digikey.com

hello sir

is possible to tell me wich fpga board to buy to build nand2tetris, fpga is new to me

greetings

gophert · Jul 27, 2019

michael1978 said:
Goodmorning
yes i did it, i goona show you.... and next what to do?

How about showing us what you've done so far (photos) and then we can help you better.

michael1978 · Jul 28, 2019

gophert said:
How about showing us what you've done so far (photos) and then we can help you better.

Hello Gophert

here one piece of alu there almost 256 wires

Hello, please can somebody help me this circuits cpu to connect with display and keyboard

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