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45 lines
1.5 KiB
Plaintext
45 lines
1.5 KiB
Plaintext
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Utility Functions for C02 Library Functions
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This module contains miscellaneous functions that aren't suited for
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inclusion in any of the existing modules.
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The contents of this module are subject to change, as any of the
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functions may be deprecated or moved to other modules in the future.
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At the beginning of the program use the directives
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#include <stddef.h02>
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#include <util.h02>
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The following functions are defined:
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addzpw(z,&n); Adds the 16 bit value &n to the zero page word
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with address z.
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Note: Stores the zero page address in temp3.
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adddst(&n); Adds the 16 bit value &n to the destination
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pointer.
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Note: Calls the addzpw function, passing dstlo
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as the first argument.
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addsrc(&n); Adds the 16 bit value &n to the source pointer.
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Note: Calls the addzpw function, passing srclo
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as the first argument.
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Note: This library expects the following to be defined:
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the zero page variables
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srclo,srchi: Source pointer
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dstlo,dsthi: Destination pointer
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and the transient variables
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temp0 Temporary storage (Accumulator)
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temp1 Temporary storage (X-Index/LSB)
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temp2 Temporary storage (Y-Index/MSB)
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temp3 Temporary storage (Zero Page Address)
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