<article>
-<title>Oric Atmos specific information for cc65
+<title>Oric Atmos-specific information for CC65
<author>Ullrich von Bassewitz <htmlurl url="mailto:uz@cc65.org" name="uz@cc65.org"><newline>
Stefan A. Haubenthal <htmlurl url="mailto:polluks@sdf.lonestar.org" name="polluks@sdf.lonestar.org"><newline>
<url url="mailto:greg.king5@verizon.net" name="Greg King">
-<date>2013-01-08
+<date>2014-03-27
<abstract>
An overview over the Atmos runtime system as it is implemented for the cc65 C
<sect>Overview<p>
This file contains an overview of the Atmos runtime system as it comes with the
-cc65 C compiler. It describes the memory layout, Atmos specific header files,
+cc65 C compiler. It describes the memory layout, Atmos-specific header files,
available drivers, and any pitfalls specific to that platform.
-Please note that Atmos specific functions are just mentioned here, they are
-described in detail in the separate <htmlurl url="funcref.html" name="function
+Please note that Atmos-specific functions are just mentioned here, they are
+described in detail in the separate <url url="funcref.html" name="function
reference">. Even functions marked as "platform dependent" may be available on
more than one platform. Please see the function reference for more
information.
-<sect>Platform specific header files<p>
+<sect>Platform-specific header files<p>
-Programs containing Atmos specific code may use the <tt/atmos.h/ header file.
+Programs containing Atmos-specific code may use the <tt/atmos.h/ header file.
-<sect1>Atmos specific functions<p>
+<sect1>Atmos-specific functions<p>
-The functions listed below are special for the Atmos. See the <htmlurl
+The functions listed below are special for the Atmos. See the <url
url="funcref.html" name="function reference"> for declaration and usage.
<itemize>
<item>atmos_load
<item>atmos_save
+<item>atmos_explode
+<item>atmos_ping
+<item>atmos_shoot
+<item>atmos_tick
+<item>atmos_tock
+<item>atmos_zap
</itemize>
The following pseudo variables declared in the <tt/atmos.h/ header file do allow
access to hardware located in the address space. Some variables are
-structures, accessing the struct fields will access the chip registers.
+structures; accessing the struct fields will access the chip registers.
<descrip>
<sect1>Graphics drivers<p>
+The default drivers, <tt/tgi_stddrv (tgi_static_stddrv)/, point to <tt/atmos-240-200-2.tgi (atmos_240_200_2_tgi)/.
+
<descrip>
<tag><tt/atmos-228-200-3.tgi (atmos_228_200_3_tgi)/</tag>
<tag><tt/atmos-acia.ser (atmos_acia_ser)/</tag>
Driver for the Telestrat integrated serial controller and the Atmos with a
serial add-on.
- Note that because of the peculiarities of the 6551 chip together with the
- use of the NMI, transmits are not interrupt driven, and the transceiver
+ Note that, because of the peculiarities of the 6551 chip, together with the
+ use of the NMI, transmits are not interrupt driven; and, the transceiver
blocks if the receiver asserts flow control because of a full buffer.
</descrip><p>
<sect1>Disk I/O<p>
The existing library for the Atmos doesn't implement C file
-I/O. There is one hack for the <tt/write()/ routine in
-place, which will make functions work that write to <tt/stdout/
-(like <tt/printf()/). However, this function has some shortcomings which
-won't be fixed, because it's going to be replaced anyway.
+I/O. There are hacks for the <tt/read()/ and <tt/write()/ routines in
+place, which will make functions work that read from and write to <tt/stdout/
+(like <tt/printf()/). However, those functions have some shortcomings which
+won't be fixed, because they're going to be replaced anyway.
-To be more concrete, this limitation means that you cannot use any of the
+To be more concrete, the limitation means that you cannot use any of the
following functions (and a few others):
<itemize>
<sect>Other hints<p>
+
<sect1>Function keys<p>
These are defined to be FUNCT + number key.
+
<sect1>Passing arguments to the program<p>
-Command line arguments can be passed to <tt/main()/. Since this is not
-supported by BASIC, the following syntax was chosen:
+Command-line arguments can be passed to <tt/main()/. Since that is not
+supported directly by BASIC, the following syntax was chosen:
<tscreen><verb>
CALL#500:REM ARG1 " ARG2 IS QUOTED" ARG3 "" ARG5
<item>Arguments may be quoted.
<item>Leading and trailing spaces around an argument are ignored. Spaces within
a quoted argument are allowed.
-<item>The first argument passed to <tt/main/ is the program name.
+<item>The first argument passed to <tt/main()/ is the program name.
<item>A maximum number of 10 arguments (including the program name) are
supported.
</enum>
interrupt handlers. Such routines must be written as simple machine language
subroutines and will be called automatically by the interrupt handler code
when they are linked into a program. See the discussion of the <tt/.CONDES/
-feature in the <htmlurl url="ca65.html" name="assembler manual">.
+feature in the <url url="ca65.html" name="assembler manual">.
</enum>
</article>
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