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Irmen de Jong 2021-11-27 19:58:08 +01:00
parent e8e25c6fd6
commit 64a411628d
3 changed files with 8 additions and 8 deletions
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4
docs/source/programming.rst
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@ -640,8 +640,8 @@ Defining a subroutine
Subroutines are parts of the code that can be repeatedly invoked using a subroutine call from elsewhere.
Their definition, using the ``sub`` statement, includes the specification of the required parameters and return value.
Subroutines can be defined in a Block, but also nested inside another subroutine. Everything is scoped accordingly.
With ``asmsub`` you can define a low-level subroutine that is implemented in inline assembly and takes any parameters
in registers directly.
With ``asmsub`` you can define a low-level subroutine that is implemented directly in assembly and takes parameters
directly in registers.
Trivial ``asmsub`` routines can be tagged as ``inline`` to tell the compiler to copy their code
in-place to the locations where the subroutine is called, rather than inserting an actual call and return to the

10
docs/source/syntaxreference.rst
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@ -194,12 +194,12 @@ Directives
.. data:: %asm {{ ... }}
Level: not at module scope.
Declares that there is *inline assembly code* in the lines enclosed by the curly braces.
This code will be written as-is into the generated output file.
The assembler syntax used should be for the 3rd party cross assembler tool that Prog8 uses.
Declares that a piece of *assembly code* is inside the curly braces.
This code will be copied as-is into the generated output assembly source file.
The assembler syntax used should be for the 3rd party cross assembler tool that Prog8 uses (64tass).
Note that the start and end markers are both *double curly braces* to minimize the chance
that the inline assembly itself contains either of those. If it does contain a ``}}``,
the parsing of the inline assembler block will end prematurely and cause compilation errors.
that the assembly code itself contains either of those. If it does contain a ``}}``,
it will confuse the parser.
Identifiers

2
docs/source/targetsystem.rst
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@ -148,7 +148,7 @@ For the C64 these routines are::
c64.set_rasterirq(uword handler_address, uword rasterline, boolean useKernal)
c64.restore_irq() ; set everything back to the systems default irq handler
And for the Commander X16:
And for the Commander X16::
cx16.set_irq(uword handler_address, boolean useKernal) ; vsync irq
cx16.set_rasterirq(uword handler_address, uword rasterline) ; note: disables kernal irq handler! sys.wait() won't work anymore