1322 Results for "8-bit cpu"

False starts are sometimes the best starts....
Log from HB6809 Homebrew computer
So it has been a long time since the last update, but here goes.... So I built up the Grant Searle / Jeff Tranter Single board 6809 computer on a breadboard: If you haven't checked out the minimal 6809 on their sites its a good read both of them,...

Introducing G8PP
Log from Generic 8-bit Processors Prototype (G8PP)
The heart of G8PP is a 5V in-situ programmable CPLD. I use Altera EPM7128S because I'm familiar with it, there may well be other suitable CPLD. EPM7128 has enough logic to solve a nagging problem with the processors of the 1970's, i.e. how...

EPROM/EEPROM alternatives?
Log from SPAM-1 - 8 Bit CPU
Ben Eater has just released his latest vid, this time he's demonstrating the build of a 6502 based computer. In this build he uses a 32k x 8 EEPROM, as he did in his earlier CPU series. This reminded me of some research I'd done for memory for...

You're Not Just Whistling Nixie
Log from The Internet of Nixie Clocks
Summary about 2 pm, Monday, January 21, 2019 The Nixie clock has a serial interface, but it's not suitable as-is, and will require some modification. Deets As mentioned before, the Nixie clock in this case is a 10-digit model produced by 'Sparkletube'. ...

MC68020 - First Steps!
Log from rosco_m68k
A while ago I bought some MC68020RC12s, and I recently decided it was time to do something with them, so I made a little adapter that allows the 020 to plug into the 64-pin DIL socket used by the MC68010 on the rosco_m68k. Of course this limits the...

TI-CBL
Log from Vintage Z80 palmtop compy hackery (TI-86)
Back in college physics I'da never thought owning a CBL would be in my future! Working on #Z80 Reverse-Engineering And Hacking Adventures, I had a weird epiphany... Ordering some chip sockets to solder in to the empty ROM and RAM slots, I came across...

TI-86 Logic Analysis
Log from Vintage Z80 palmtop compy hackery (TI-86)
whelp... I managed to speed up the sampling rate dramatically... My signal is /supposed/ to toggle (or not) at 8us intervals... My original sampling code took 39T-States per sample, or at 6MHz 6.5us/sample... IF I understand the z80 right... The new...

What's inside?
Log from Hacking the AlphaSmart NEO
I was going to open up my NEO unit to see what's inside. But, fortunately, people have already done that. There is a CR2032 coin-cell inside that serves as backup to retain SRAM while the AA batteries are removed. Some power users have opened their units...

PAROL6 control board
Log from PAROL6 - Desktop robotic arm
Introduction The PAROL6 control board is the advanced 32-bit controller for 6 AXES robotic arms like PAROL6. It works out of the box with PAROL6 and PAROL6 commander software. To use PAROL6 robotic arm you will need a PAROL6 control board. The PAROL6...

High speed AVR based EEPROM programmer (part 1)
Log from DB6502
How to lose your mind in three really simple steps We have all been there, more than we care to remember. You are in the middle of creative frenzy, writing your code as the Devil himself. Compile, link, grab the programmer. Fish out that ROM chip...

Why I Am and Am Not a Fan of STEbus.
Log from Backbone Bus
First, the cons, which are deal-breakers for me.1. 20 Address Bits. This might seem like an awful lot of address space; I mean, you have 1MiB of memory space with STEbus. However, with so few address bits, this means you cannot practically...

Finally! PRUs in the picture
Log from Lepton 3.5 Thermal Imaging Camera
My post-holiday obsession continued until I am - finally - reading data from the Lepton using both PRUs in a Beaglebone Black. Given how - relatively - easy it is to use the PRUs I have to confess I pored over a lot of web postings before...

Proto Version 4 Schematic Capture
Log from D-DAQ
Finished this puppy up. Contrary to what I was initially planning, I am not revising the board design to incorporate an off-board power supply subsystem.. If needed that'll happen down the road though. I have though come across numerous little bugs that...

ISA PnP, now that's a hack!
Log from today's assorted project ramble "grab-bag"
Meh... wrote this a while-back, realized I got some details wrong, intended to fix 'em, but ah well. The jist's there.-----Always been a running-background-thought in the ol' noggin... how can ISA plug-and-play function on a bus which, by-design, requires...

The actual informations
Log from Extension card for TDS3000 scopes
Detecting and identifying a card As stated in an earlier log, the card insertion is detected by grounding the pin *CD. But this is not enough to make the scope believe he have a know card inside him. You need to indicate him what type of card was inserted....

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