72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/*
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* Copyright (c) 2024 Scott Duensing, scott@kangaroopunch.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "f256.h"
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#include "f256.c"
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void firstSegment(int arg1, int arg2);
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void secondSegment(int arg1, int arg2);
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void moreFirstSegment(int arg1, int arg2);
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// This is the first segment we've defined. The linker will place this code in
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// the first available far memory slot (default 0x10000).
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#define SEGMENT_FIRST
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void firstSegment(int arg1, int arg2) {
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printf("firstSegment = %d\n", arg1 + arg2);
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secondSegment(arg1, arg2);
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}
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// This is the second segment we've defined. The linker will place this code in
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// the next available far memory slot (default 0x12000).
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#define SEGMENT_SECOND
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void secondSegment(int arg1, int arg2) {
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printf("secondSegment = %d\n", arg1 + arg2);
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moreFirstSegment(arg1, arg2);
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}
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// Back to the first segment. The linker will place this code immediately
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// after the previous first segment code.
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#define SEGMENT_FIRST
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void moreFirstSegment(int arg1, int arg2) {
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printf("moreFirstSegment = %d\n", arg1 + arg2);
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}
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// Back to near memory, the 64k visible to the processor. By default, this
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// segment begins at 0x300.
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#define SEGMENT_MAIN
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int main(int argc, char *argv[]) {
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// The overlay tool will generate trampoline macros for each function
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// that is located in a far segment so no code changes are required.
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firstSegment(1, 2);
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// Spin.
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for (;;);
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return 0;
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}
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