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5

PlayZX is an Android application which lets you select from thousands of Sinclair ZX Spectrum games and play them through the headphone jack to load them onto your Speccy. You can also select your local (on the device) files, convert them to sound files, and then play them. This way you can load games for not only the ZX Spectrum micro but also a few other retro computers that have a compatible audio jack. 

...continue reading "PlayZX"

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In this blog I will show you how to interface an Atari-style joystick to the Altera DE1 FPGA board running a Spectrum implementation, how to change the ROM to enable you to input some game-cheat pokes and a few games I eventually completed using this setup.
...continue reading "ZX Spectrum ROM mods"

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This article contains a brief overview and a background of theĀ A-Z80 CPU created for FPGA boards and a ZX Spectrum implementation tied to it.

(You can find the Russian translation of this article here: https://howtorecover.me/z80-s-nulya)
...continue reading "The A-Z80 CPU"

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In the last article I presented a different way of architecturally modelling a Zilog Z80 processor. It is time to do something really useful with it and what could be better than reliving the past for a moment? Let's recreate an old computer and load in and play some games!
...continue reading "ZX Spectrum on FPGA using A-Z80 CPU"

1

In the first post I described the sequencer, a circuit that provided discrete timing signals to space operations apart. In the second post I mentioned the Timing matrix that was run by these signals and orchestrated a dance of control signals in time.

This article is about making it all alive and kicking within an FPGA solution.
...continue reading "A Z80 : The Soul"