Assembly-Language Information
Some chapters provide additional assembly-language information. For example, Inside Macintosh provides information about the registers for specific routines like this:
Registers on entry A0 Contents of register A0 on entry
Registers on exit D0 Contents of register D0 on exit In addition, Inside Macintosh provides information about the fields of a parameter block in this format:
<-> inAndOut Integer Input/output parameter. <-- output1 Ptr Output parameter. --> input1 Ptr Input parameter. The arrow in the far left column indicates whether the field is an input parameter, output parameter, or both. You must supply values for all input parameters and input/output parameters. The routine returns values in output parameters and input/output parameters.
The second column shows the field name as defined in the MPW Pascal interface files; the third column indicates the Pascal data type of that field. The fourth column provides a brief description of the use of the field. For a complete description of each field, see the discussion that follows the parameter block or the description of the parameter block in the reference section of the chapter.