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5 <title>Oric Telestrat-specific information for cc65
7 <url url="mailto:jede@oric.org" name="Jede">,<newline>
12 An overview over the Telestrat (telemon 3.0 : http://orix.oric.org) runtime system as it is implemented for the cc65 C
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19 <!-- Begin the document -->
23 This file contains an overview of the Telestrat runtime system as it comes with the
24 cc65 C compiler. It describes the memory layout, Telemon3.0-specific header files,
25 available drivers, and any pitfalls specific to that platform.
27 Please note that Telemon3.0-specific functions are just mentioned here, they are
28 described in detail in the separate <url url="funcref.html" name="function
29 reference">. Even functions marked as "platform dependent" may be available on
30 more than one platform. Please see the function reference for more
35 <sect>Binary format<p>
37 The standard binary output format generated by the linker for the Telemon 3.0 target
38 is a machine language program with a 20 bytes header described here : http://orix.oric.org/doku.php?id=orix:header
42 <sect>Memory layout<p>
44 In the standard setup, cc65-generated programs use the memory from
45 $0801 to $9800; so, nearly 37K of memory (including the stack) is
46 available. ROM calls are possible without further precautions.
54 The C runtime stack is located at $97FF (or $B3FF), and grows
58 The C heap is located at the end of the program, and grows towards the C
65 <sect>Platform-specific header files<p>
67 Programs containing Telemon 3.0 -specific code may use the <tt/telemon.h/ header file.
70 <sect1>Telemon 3.0-specific functions<p>
72 The functions listed below are special for the Telemon 3.0. See the <url
73 url="funcref.html" name="function reference"> for declaration and usage.
84 <sect1>Hardware access<p>
86 The following pseudo variables declared in the <tt/atmos.h/ header file do allow
87 access to hardware located in the address space. Some variables are
88 structures; accessing the struct fields will access the chip registers.
93 Access to the VIA (Versatile Interface Adapter) chip is available via the
94 <tt/VIA/ variable. The structure behind this variable is explained in <tt/_6522.h/.
100 <sect>Loadable drivers<p>
102 <em>Note:</em> Since the Atmos doesn't have working disk I/O
103 (see <ref id="limitations" name="section "Limitations"">), the
104 available drivers cannot be loaded at runtime (so the term "loadable drivers"
105 is somewhat misleading). Instead, the drivers have to be statically linked. While
106 this may seem overhead, it has two advantages:
109 <sect1>Extended memory drivers<p>
111 No extended memory drivers are currently available for the Atmos.
114 <sect1>Joystick drivers<p>
118 telemon 3.0 manages joysticks but it had been handled yet.
123 <sect1>Mouse drivers<p>
125 Telemon 3.0 manages also mouse, but it had been no handled yet in this version.
127 <sect1>RS232 device drivers<p>
137 <sect>Limitations<label id="limitations"><p>
141 This version handles fopen, fread, fclose primitives. Because Telemon 3.0 handles these two primitives. By the way,
142 it uses an extension "ch376 card" which handles sdcard and FAT 32 usb key.
158 This software is provided 'as-is', without any expressed or implied
159 warranty. In no event will the authors be held liable for any damages
160 arising from the use of this software.
162 Permission is granted to anyone to use this software for any purpose,
163 including commercial applications, and to alter it and redistribute it
164 freely, subject to the following restrictions:
167 <item> The origin of this software must not be misrepresented; you must not
168 claim that you wrote the original software. If you use this software
169 in a product, an acknowledgment in the product documentation would be
170 appreciated but is not required.
171 <item> Altered source versions must be plainly marked as such, and must not
172 be misrepresented as being the original software.
173 <item> This notice may not be removed or altered from any source