It all makes sense to me v(._. )v https://vintageapple.org/inside_o/pdf/Inside_Macintosh_Volume_I_1985.pdf#page=100 https://vintageapple.org/inside_o/pdf/Insid

It all makes sense to me v(._. )v https://vintageapple.org/inside_o/pdf/Inside_Macintosh_Volume_I_1985.pdf#page=100 https://vintageapple.org/inside_o/pdf/Inside_Macintosh_Volum... “Calls to the Toolbox and Operating System via the trap dispatch table are implemented by means of the MC68000's "1010 emulator" trap. To issue such a call in assembly language, you use one of the trap macros defined in the macro files. When you assemble your program, the macro generates a trap word in the machine-language code. A trap word always begins with the hexadecimal digit $A (binary 1010); the rest of the word identifies the routine you're calling, along with some additional information pertaining to the call.”