I thought my latest little retrocomputing project might beof interest.?A few weeks ago, our accounting department trashed some oldequipment that had been in a closet sine the 70?s.? Because it was all fully depreciated long ago, the stuff wasup for grabs.? Most of it was junk,but they did have 5 HP 9100B calculators that seemed to be in pretty goodphysical shape.? These are from the1960?s, and are pretty huge for a calculator, by today?s standards.? I tried them all, and they all seemedto have some pretty weird behavior.?When you hit the ?+? key, it doesn?t wait for another number, butinstead adds the last row directly to the second row.? I suppose that?s why these have been out of commission allthese years.? View image: Strange calculator behavior | ? | | ? | | ? | ? | ? | ? | ? | | View image: Strange calculator behaviorhttp://postimg.org/image/rnyl9uexz/ Link copy to clipboard http://s23.postimg.org/otvfwecrv/Strange_calculator_behavior.jpg Direct Link copy to clipboard ? | | | | View on postimg.org | Preview by Yahoo | | | | ? | I figured since they are free, I?d pick one up and find aproject for it.? They do have somepretty cool cases.? They had someprinters as well, off in a corner, but I was more interested in using thecalculator as the basis for some kind of retrocomputing project, and theprinters were not compatible with anything else, so I passed.?This weekend, while cleaning up the lab, I came across anold Jumptec PC104 form-factor board with a 486 processor and an add-on LCDcontroller.? I figured this couldbe the perfect ?upgrade? for the 9100B.?Luckily, the HP machine was very well designed, and easy todisassemble.? I was very easilyable to fit the PCM-104 stack, a power supply, screen, SD card, and HappyHacking keyboard.? Almost a perfectfit!!?View image: Out with the old, in with the new!! | ? | | ? | | ? | ? | ? | ? | ? | | View image: Out with the old, in with the new!!http://postimg.org/image/6051lnp5z/ Link copy to clipboard http://s23.postimg.org/5am99aomj/Out_with_the_old_in_with_the_new.jpg Direct Link copy to clipb... | | | | View on postimg.org | Preview by Yahoo | | | | ? | Of course, no retro-computer is complete without a properretro-operating system.? Here youcan see the project in near final shape, running windows 95Perhaps some time inthe future, I?ll upgrade this to a more modern processor, but for now, justpure retrocomputing goodness! View image: Up and running, retro style! | ? | | ? | | ? | ? | ? | ? | ? | | View image: Up and running, retro style!http://postimg.org/image/xm7t6c8iv/ Link copy to clipboard http://s23.postimg.org/ki28tngh7/Up_and_running_retro_style.jpg Direct Link copy to clipboard ? | | | | View on postimg.org | Preview by Yahoo | | | | ? | ?Future upgrades include:??????Laser-cutting or 3d-printing a proper faceplatefor the keyboard, and transplanting the keyboard PCB directly to the case.??????Adding some LED strip-lighting for a morestriking presentation.?Let me know what you think!?Dave