- #Zx81 emulator windows install#
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- #Zx81 emulator windows tv#
More detailed technical specs (and a whole lot more) can be found at Retroaisle’s “Sinclair ZX81” website. There was an expansion port at the back for devices such as printers, 16K RAM packs, etc.
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The entire unit was a single box with membrane keyboard, 9V DC input, TV video output, and cassette audio ports.
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It started with 8K ROM and 1K RAM on board, the video output was generated by the CPU (interleaved with executing BASIC and machine code programs). Still works!Ī compact, efficient use of technology for the time, the ZX81 was a 3.5MHz Z80-based computer made by Sinclair Research Limited in the UK. I’ve recently uncovered a variety of cassette tapes from my ZX81 days, along with my old unit itself. Eventually I moved up to a BBC Model B Microcomputer, but the ZX81 definitely whetted my appetite for computing. I spent hours and hours on this thing, learning to program in Sinclair BASIC and Z80 machine code to squeeze the most out of my 1K (later 3K) of RAM.
#Zx81 emulator windows install#
I'll be making changes regularly and the latest changes will be on the 'Recreated Spectrum Project Files to Download' page.Īlso, make sure you download and install the Arduino USB_Host_Shield_2.0 libraries from Github before compliling the Recreated Spectrum Project Files.I purchased a “ Sinclair ZX81 Microcomputer” not long after it hit the market in the early 1980s - my first real home computer.
In fact one of the next steps could well be to do just that, along with mating the whole arrangement with a Raspberry Pi in a custom Sinclair inspired case.įor those that feel like a little experimentation, feel free to mess around with some hot of the presses Recreated ZX Spectrum Arduino Sketches.
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While I've used a Leonardo and full sized USB host shield initially, there is no reason why a Pro Micro and mini USB host adapter could not be used to do the same thing.
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As a result, Mode 'A' is permanently set to on, at the back of the Recreated Spectrum, "CAPS SHIFT" + "SYMBOL SHIFT" + "ENTER" now changes modes on the external Arduino Leonardo based solution.Īll key-mappings as described in the Recreated Spectrum's manual and Cheat Card remain the same, with the exception of the Windows, and Print Screen Keys which have been left unmapped at this stage. Having already decoded Mode 'A' for usage, adding a simple keyboard selection would be simpler way to manage switching into Mode 'B' or vice versa. I decided that if using an external device to do the decoding, this mechanism would become problematic. Normally to enter either Mode 'A' or Mode 'B', a slider switch on the keyboard needs to be placed in the correct position. Once Mode 'A' was covered, it was time to move onto Normal / PS2 mode (Mode 'B'). It was a simple matter of matching the codes the Recreated Spectrum passed out on each of these events with the actual keys. See the previous post for a deeper explanation.Įmulation mode was quite straightforward in it's implementation, being that all keys are registered when pressed or released, if in a slightly odd way. Disregarding this Emulation or Mode 'A' as it is labeled, is the easiest to target for any external hardware solution used in remapping the Recreated Spectrum's keys in order to provide a Normal Spectrum Emulator experiance. The odd thing here being that in Emulation mode, the Recreated Spectrum is not compatible with the vast majority of Spectrum Emulators (at least at the time of writing). The end result a fully working Recreated ZX Spectrum keyboard.Īs talked about previously, the Recreated Spectrum has two keyboard modes, one for PS2 functionality and one for Emulation. Following on from the previous posts, in some free time this week, I butchered my ZX81 / AZ15 Arduino keyboard sketch libraries, sliced in some code for a USB host shield and beat an Arduino Leonardo into submission.
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