Rune Kyndal has updated the project titled Psion x86.Matthew Pearce has updated the log for Merlin.kpennel liked 65c02 Homebrew Computer on breadboard.marble has added a new project titled test project.6502addict liked 68k-MBC: a 8 homebrew computer.David Matthew Mooney has updated details to Global Climate Control from Your Back Yard.Jon Williams on ApocaPi Now Is A Cyberdeck For What Comes After.Greg A on Tech In Plain Sight: Tough As Nails.Doktoreq on Mustool Scopemeter Review And Teardown.Posted in Retrocomputing Tagged 74LS161, arduino, backup, counter, minicomputer, nano, rom Post navigation We’d actually have loved that, but we get it - sometimes you just need to throw an Arduino at a job and be done with it. What exactly the data on the ROMs mean, if anything, remains a mystery, but at least it’s backed up now.īefore anyone notes the obvious, yes, could have used a 555 to clock the reader - perhaps even this one. The breadboard setup made supporting multiple ROM pinouts easy, even for the chips that take -9 volts. The circuit gave the same results as the known good read, meaning results would be valid for the rest of the chips.
#How to make a rom hack professionaly serial#
The hardware is straightforward - a 12-bit counter built from a trio of cascaded 74LS161s to step through addresses, plus an Arduino Nano to provide clock pulses and to read the data out to the serial port. The work was eased considerably by the fact that he had managed to read one chip in a commercial reader, giving him a baseline to compare his circuit against. When finding a commercial ROM reader supporting the various chips proved difficult, decided to build his own. Of course, getting a machine from the Reagan administration running is not without its risks, including the chance of losing whatever is on the machine’s many ROM chips forever. And what does a hacker do with such an acquisition but attempt to get it going again? Have you ever heard of a Centurion minicomputer? If not, don’t feel bad - we hadn’t either, until stumbled upon a semi-complete version of the 1980-ish mini in all its wood-trimmed, dust-encased glory.
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