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separating standard file I/O from low-level paravirtualization

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Brad Smith 2019-05-27 14:57:31 -04:00 committed by Oliver Schmidt
parent 53bfd2e8cd
commit 26d436b90d
1 changed files with 8 additions and 5 deletions
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doc/sim65.sgml
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@ -115,12 +115,11 @@ The <tt/exit/ function may also be used to terminate with an exit code.
Exit codes are limited to 8 bits.
The standard C library file input and output is functional,
with <tt/STDIN_FILENO/, <tt/STDOUT_FILENO/ and <tt/STDERR_FILENO/ mapped to sim65's
STDIN_FILENO, STDOUT_FILENO and STDERR_FILENO.
The standard C library high level file input and output is functional,
and can be used like a command line application in sim65.
These utilize an underlying set of built-in virtual functions
for simple file input and output:
Lower level file input and output is provided by
a set of built-in paravirtualization functions:
<tscreen><verb>
int open (const char* name, int flags, ...);
@ -129,6 +128,10 @@ for simple file input and output:
int __fastcall__ write (int fd, const void* buf, unsigned count);
</verb></tscreen>
These built-in functions can be used with
<tt/STDIN_FILENO/, <tt/STDOUT_FILENO/ and <tt/STDERR_FILENO/
which are mapped to sim65's corresponding file descriptors.
<sect>Creating a Test in Assembly<p>