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It is necessary to create an equate file with the routine names equated to their respective codes, or
download the archive file C32SCALL.ARC from the Motorola FREEWARE Bulletin Board
(BBS). For more information on the FREEWARE BBS, reference customer letter
M68xxxEVx/L2.
When using the CPU32Bug one-line assembler/disassembler, the SYSCALL macro and the
equates are pre-defined. Input: SYSCALL, space, function, carriage return.
EXAMPLE
CPU32Bug>M 3000;DI<CR>
0000 3000 00000000
0000 3000 4E3F0022
0000 3004 00000000
CPU32Bug>
5.1.2 Input/Output String Formats
Within the context of the TRAP #15 handler are three string formats:
Pointer/Pointer Format
Pointer/Count Format
Line Format
5.2 SYSTEM CALL ROUTINES
Table 5-1 summarizes the TRAP #15 functions. Refer to the appropriate paragraph for a
description of the available system calls.
M68CPU32BUG/D REV 1
ORI.B #$0,D0? SYSCALL .OUTLN <CR>
SYSCALL .OUTLN
ORI.B #$0,D0? . <CR>
The string is defined by a pointer to the first character and a
pointer to the last character + 1.
The string is defined by a pointer to a count byte which
contains the count of the characters in the string followed by
the string itself.
A line is defined as a string followed by a carriage return and a
line feed.
5-2
SYSTEM CALLS
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