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readme
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README.md
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README.md
@ -23,13 +23,14 @@ https://prog8.readthedocs.io/
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What does Prog8 provide?
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------------------------
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- big reduction of source code length over raw assembly
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- reduction of source code length over raw assembly
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- modularity, symbol scoping, subroutines
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- various data types other than just bytes (16-bit words, floats, strings)
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- automatic variable allocations, automatic string and array variables and string sharing
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- subroutines with an input- and output parameter signature
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- no stack frame allocations because parameters and local variables are automatically allocated statically
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- constant folding in expressions and other high-level program optimizations
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- subroutines with input parameters and result values
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- high-level program optimizations
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- small program boilerplate/compilersupport overhead
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- sane variable initialization, programs can be restarted again just fine after exiting to basic
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- conditional branches
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- floating point operations (requires the C64 Basic ROM routines for this)
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- 'when' statement to provide a concise jump table alternative to if/elseif chains
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@ -38,8 +39,10 @@ What does Prog8 provide?
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- various powerful built-in libraries to do I/O, number conversions, graphics and more
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- convenience abstractions for low level aspects such as ZeroPage handling, program startup, explicit memory addresses
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- fast execution speed due to compilation to native assembly code
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- variables are allocated statically
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- inline assembly allows you to have full control when every cycle or byte matters
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- supports the sixteen 'virtual' 16-bit registers R0 .. R15 from the Commander X16, and provides them also on the C64.
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- encode strings and characters into petscii or screencodes as desired (C64/Cx16)
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*Rapid edit-compile-run-debug cycle:*
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@ -1 +1 @@
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6.2
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6.3-SNAPSHOT
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@ -50,8 +50,9 @@ Language features
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- Provide high level programming constructs but at the same time stay close to the metal;
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still able to directly use memory addresses and ROM subroutines,
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and inline assembly to have full control when every register, cycle or byte matters
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- Arbitrary number of subroutine parameters, Complex nested expressions are possible
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- No stack frame allocations because parameters and local variables are automatically allocated statically
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- Subroutines with parameters and return values
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- complex nested expressions are possible
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- Variables are allocated statically
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- Nested subroutines can access variables from outer scopes to avoids the overhead to pass everything via parameters
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- Variable data types include signed and unsigned bytes and words, arrays, strings and floats.
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- High-level code optimizations, such as const-folding, expression and statement simplifications/rewriting.
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@ -4,8 +4,6 @@
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main {
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sub start() {
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; todo feedback: new routines at the end of the jump table so existing jump vectors remain unchanged
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txt.lowercase()
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vtui.initialize()
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