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'''Varvara''' is a fantasy computer system that uses runs a stack-based virtual machine called '''Uxn'''. Its main programming language is a Forth-like | '''Varvara''' is a fantasy computer system that uses runs a stack-based virtual machine called '''Uxn'''. Its main programming language is a Forth-like language called Uxntal. | ||
== Uxn == | == Uxn == | ||
=== Memory === | === Memory === | ||
The Uxn virtual CPU can address 64kb of memory; programs can move stacks into addressable range to allow reading and writing directly into stack memory. In this way, peripherals such as a controller, mouse, and keyboard can be addressed. | |||
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Uxn is a single-page virtual machine with 32 opcodes. This system has no registers, and instead uses a 127-level stack. | |||
== Devices == | == Devices == | ||
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The two reserved devices can be used for implementation specific features that do not need to be part of the specs, or other Uxn/Varvara instances. | The two reserved devices can be used for implementation specific features that do not need to be part of the specs, or other Uxn/Varvara instances. | ||
[[Category: Fantasy | [[Category: Fantasy Computers]] |