91 Results for "8-bit cpu"

Two Years Later
Log from Novasaur CP/M TTL Retrocomputer
It's been a couple of months since the last update and more like three since anything meaningful changed. There has been (yet) another board revision and Rev. 8 is now good enough to actually solder the chips in place! Just like last year,...

Choosing right microcontroller
Log from Mining Bitcoins In ATTiny
First thing that I have to decide is to find uC, that suits my needs. My requirements:CheapHave some sort of hardware communication (bitbanging would consume scarce CPU time)Have sufficient internal memory. To be more specific:Initial hash value:...

After the PCB gets submitted, all is fine, I can rest for a bit, right?
Log from LayerOne 2017
THE DAY AFTER......As we walk casually to the workshop, and discuss the various quad copter projects, and my old Traxxas RC truck which I have up the bench to repair it's glow engine and trying to find other radioactive sources to test geiger counters...

Adapting and running Tiny Basic (benchmarks!)
Log from From bit-slice to Basic (and symbolic tracing)
The history of Tiny Basic programming language goes back to the same era when first home/hobby microcomputers powered by 8-bit microprocessors started to appear. Due to ROM/RAM size limitations (2kB each) and the CPU used (8080), the choice of Tiny Basic...

Sound
Log from Dodo: 6502 Game System
All along I knew I wanted to figure out sound for Dodo because a game system just wouldn't be right without it. I have been going back and forth with lots of different approaches in my mind. Dedicated sound generation chips that mixed both digital and...

Please, GCC !
Log from PEAC Pisano with End-Around Carry algorithm
I get tired of fighting GCC's weird code generator that won't get a clue from my source code. I'm (still) using gcc6.4.1 (2017, I know) but I don't know how to make it understand basic things... This is critical at my level because any little performance...

"But, What is Internet?" - How to Cyber(deck) and what one is, anyways...
Log from A Cyberdeck for the Masses
https://imgur.com/gallery/Nx1dnUwThe, erm, less-obvious reference, all the way from 1994......if you don't get the more-obvious one, well, you're probably just not old enough! Wait a few years, I'm not explaining it. Especially not here...*ahem*A brief...

Display
Log from Apollo Guidance Computer
I started wiring up the Memory sub-system board and realized quickly that I needed the display board to show the state of the various registers. I first had to create a backplane to connect the boards into. The backplane carries all the signals...

[E6][R] UMPC idea: Leti
Log from Tetent [gd0090]
[17 May: I've now made this idea into its own project] [21 April] I really should get to a MVP Tetent out of the door ASAP so that Reality(TM) can throw me under the bus ASAP and tell me why my solution doesn't work, even when mitigating as many...

6th step : keep trying
Log from 2D LED Ping ball
So even after all of our effort we couldn't manage to make it work for our big LED matrix, so we went back to the simple 8x8 one. We then tried to link the speaker to the Arduino board with the LED matrix and the accelerometer, but we ran into another...

Very brief review of ATmel's new ATtiny 102
Log from Minimalist A-go-go
Fortunately I got very recent ATmel MCU ATtiny102 and quickly tried to program RGB LED blinking through ATmel Studio. I found several differences from conventional 8-pin AVRs in every aspect.(1) programming method is NOT SPI but TPISo far, 8-pin AVR...

Indecisions Already
Log from IBM PC Classic Edition
Ok, I haven't touched this project much since my classes begun this year, but since I have started it I had 2 ideias for this project that meet my goals in one way or another.I have concluded that I can make the case 50% or even 40% of the original IBM...

Annotated board images
Log from Fixing up an old Pioneer 3-DX
Annotated boards V1: buzzed out and hooked up. Note, I have no schematics, this is what I assume as I haven't tested yet. Just self notes. DOCK: Pioneer chassis has a self charging dock on the underside. Power board has a port J2 to control a solenoid...

Interfacing ternary and binary components
Log from Homebrew ternary computer
Ok, now it is kind of proven that binary CPLD (or FPGA) may implement ternary logic, but how we can integrate it with "true" ternary components, especially when CPLD is 3.3V and TRIMUXes are -5V and +5V? Answer is DG403 chips may do the job: Because...

choosing core memory
Log from GLASNOST Vacuum Tube Computer
Got a few of those core memories from a Russian PDP-8 clone, the Saratov-2, it´s 64x64 core matrix, forming 4096 bits.I´d need four of those planes for the computer, one plane for each bit of the 4-bit word. The thing is that they are...

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