It was originally developed for the Cambridge Z88 portable computer but is now ported to lots of different Z80 powered platforms, including many TI-8x calculators and of course our ZX Spectrum. For those who are a bit afraid to dive into the wonderful world of assembly language, there is also a C compiler called z88dk. However, Pasmo is not the only tool suitable for our needs. # shell session you start or include it in your configuration. # Set up environment variables, you need to do this for every # Compile and install Pasmo to $HOME/speccy/pasmo directory The steps to install Pasmo to our speccy directory are: # Download the latest Pasmo source code and unarchive it This means you can load the resulting binary in an emulator and it just works. Probably the most suitable for our case is Pasmo, which is not only able to generate machine code, but it is also able to create a full cassette image complete with BASIC loader stubs. Personally I bought my copy over 10 years ago, but luckily it is now 2014 and there are several assemblers available for free.

Back in the day these computers were all programmed with assembly language and the best compilers like Telemark Cross Assembler come with a price. Next thing I need to do is to find a compiler. Since I do not want to mess up the local environment, I first decided to create a new directory called speccy under my home directory: cd $HOME I'm running the latest Mac OS X, so I decided to setup a simple build environment for the system. NOTICE: To follow these instructions you need to have XCode installed from the App Store in order to be able to compile the source code. The first problem we face is of course: How do I setup a programming environment for this thing? But it was the high resolution 256x192 video output that differentiated it (and its predecessor ZX Spectrum 48K) from its arch enemy Commodore 64. It's a very nice system with a 3.5 MHz Zilog Z80 CPU, 32 KB ROM, 128 KB RAM, three channel AY-3-8912 sound chip, MIDI compatibility, RS-232 serial port and a multipurpose extension port. Not so long ago we got a new cool gadget at the office, ZX Spectrum +2 computer released by Amstrad around 1986 including a keyboard and a cassette deck for loading programs.

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