"Hey, Kip. How do you suppose these things work?" A gruff voice called from somewhere among the heap of dismantled machinery that was once part of a rock jumper, a small, but fast ship that was now in pieces.Kip Heren stopped poking at the array of tiny...
The Nixie Driver IC I am going to use is a K155ID1, which is a Russian clone of the SN74141.Using good ol' Google, I found plenty of old Datasheets that helped me figure the (hopefully!) definitive pin-outs needed to correctly connect the IC. Together...
This is a partial render of my next board spin. The big changes here are 4-bit SDIO (more about this later), removing the audio filters, and adding a 5V boost converter onboard.I am working to add a boost converter to the Zero that should allow operation...
This part was obtained on March 10th, 2017.The CPU used in this project is the Intel Pentium w/MMX Technology, clocked at 200MHz internally with a 66MHz bus speed. It uses an eclectic 2.8V input voltage, which was strikingly high for the era. It's the...
I started to see how I could optimize the CPU.I looked at my memory interface code in the TMS9900 core, and realized I have been using very conservative timings - just to make sure that when debugging the CPU the memory interface does not cause problems....
With full deference to Maximilian Strauch's Apple II emulator and Jorj Bauer's Apple IIe emulator, here's my first concept for the initial prototype of the terminal board. I've already ordered some of the parts.I had to re-arrange the pins to get the...
One of the first parts in technical papers is a survey of existing works. Z8000 board (the Trump Card) by Steve Ciarcia in Byte magazine Hardware: A full-length ISA board as a slave to the PC. Most of it is a massive array of sixty-four 4164 DRAM...
I found a 27 MHz RC truck at Walmart for $10 - so now, I've blown my budget for this project. But, at least, I did get the serial port SDR to control it :-) Check out the video here: It works because the fast edges of the waveform on the TX line...
This is what I've been using so far, and will be until the new PCBs come back. It's a little primitive, and not entirely stable, but it allows adjustable delays with a resolution of tens of picoseconds. It's also really interesting to see how ground...
So, I'm having a busy weekend here, having just launched the rosco_m68k on Tindie I've spent some time putting together my first few orders (thanks all who've ordered so far!) but luckily I've still found plenty of time for hardware hacking. I've...
As a reminder: We have two independently-controllable banks of RAM, each of 4 chips [Left column and right]. These banks are wired together in such a way that all 8 chips can be accessed by a single r/w connection to the data bus through a sort of march...
One of the final things missing from the Yellow MSX series of kits for the RC2014, is the ability to access typical MSX storage devices (floppy and cassette). Without storage such as this, its hard to claim that we have achieved full MSX compatibility....
Fter getting overwhelmed with the user interface(I underestimated that task), I decided to go for an easy win to keeo me going. Changing the ISO settings seemed simple enough. Unlike most things that seem simple enough, this task actually was. I got...
TL;DR When adjusting parameters in the MPLab IDE's Code Configurator (MCC) then simply saving the settings is not enough, you MUST hit Generate to recreate the generated config files --- I my previous videos about this module I'd made a comment...
After the Template has been finished, the logic ist added. Controller: As controller, I am going for the ATmega328P-AU (that's the Arduino Uno µC). The display driver will be the HT1621B. Power: The two AA batteries will only deliver 2.5 - 3V (Datasheet...