I ve been tinkering around with VoIP gateways lately. After I got an old rotary dial phone working over the internet, using a free SIP service and a smartphone, I tried it in reverse , and offline: to establish communication between 2 computers and get them on the internet. And that worked! But what if a proper modem was not in place? Will it work over a phone? I [more]
Here s a small update to my Arduino MFM/RLL disk drive controller from a couple of months ago: Main boards: version 1.1 and the previous v1.0. PCBs, schematics and the source code can be found on my GitHub repository. The top-most separator boards are unchanged and can be used both interchangeably, and in any orientation. The main thing was to get rid of the greatest speed bottleneck: [more]
A spinoff of my previous MegaFDC project, this one targeting the oversized diskette : working with an ancient MFM/RLL hard drive, also known as a Winchester disk, under Arduino, through USB. Code name Winchesterduino . Quite a tongue-twister In action with a Seagate ST-225. Boards, schematics and the source code can be found [more]
teda úprava známeho emulátora PMD 32 bratov Bórikovcov pre tých, ktorým sa nechce riešiť plošák, pájkovať slot pre SD kartu a oživovať ATmegu v programátore; zato majú doma Arduino, alebo jeho lacný klon, a vedia si navrch nacvaknúť displej z Aliexpressu za pár chechtákov. Zdrojový kód projektu dostupný tu. Ten bluescreen na konci je vtip, na osembiť� [more]
Hneď na úvod poruším pravidlo a nebudem písať tento príspevok anglicky, keďže je to merák našej proveniencie nedávno som si ho dával dokopy a po odstránení technických porúch (taká tá klasika: bočníky, asfalťák, studeňáky) nasledovali tie estetické červená indikácia v mikroampérmetri a zošúchaný predný panel. Pôvodný stav a návrh nového štít [more]
A while ago they ve been airing reruns of the old black white Addams Family series that I watched at my sister s place. In one scene they ve shown Gomez reading ticker tape, losing $1,000,000 just moments after he earned them, and my eyes immediately landed on a make-up brush holder my sister uses. That thing, I said to myself, looks similar to his stock ticker [more]
About a year ago I made a small project to see if I could make an old floppy controller chip, salvaged from a PC card, talk to an Arduino Mega board that I had left over from a 3D printer setup. With that being a success, I ve extended the project to include 8-inch drives and 2.88MB PS/2 diskettes. One last step before I run out of RAM is to include ImageDisk support! Main menu, with IMD [more]
Earlier this year I ve got a cheap old Amiga 500 for tinkering purposes. Now, I never really had any Commodore paraphernalia around here, and my first PC was a 486 to play games on, but some of my DOS favorites were actually ported from an Amiga, so I have decided to give this one a try The Rev6 A500 (ECS), with some homebrew accessories As part of the [more]
Recently I have been drawn before the commission of a local telco bureau, to take part in an amateur radio examination, by a fellow attendee. The motivation? Well, each time I tinkered with a radio, I always skipped scanning of ham bands as I never really found debates regarding signal reports, the weather or their next planned doctor s visits to be of particular [more]
The infamous PC junior celebrates 40 years since its day of announcement, and for this special occasion I have decided to make a short re-visit to one of the experiments I did 3 years ago: booting from a vinyl record utilizing the cassette tape interface 3-stage tape/vinyl bootloader, utilizing BASIC in the ROM, loading 160K PC DOS Source code, binaries and [more]