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Bruce Abbott · 13 October 2020, 22:05

Devpac 3 and Barfly debuggers both refuse to disassemble the instruction shown in hex below (partial disassembly of ProAsm V1.92). Does anyone know what it is?

Code runs in supervisor mode and appears to be trying to determine the processor type or features.

Code:

 cmp.w   #$0004,D2
 beq.s   w001570
 .
 .
w001570:
 dc.w    $f041      <--- unknown instruction
 dc.w    $0001
 nop
 nop
 or.l    D0,D2

13 October 2020, 22:05	#1
Bruce Abbott Registered User Join Date: Mar 2018 Location: Hastings, New Zealand Posts: 2,658	What instruction is this? $F041 $0001 Devpac 3 and Barfly debuggers both refuse to disassemble the instruction shown in hex below (partial disassembly of ProAsm V1.92). Does anyone know what it is? Code runs in supervisor mode and appears to be trying to determine the processor type or features. Code: cmp.w #$0004,D2 beq.s w001570 . . w001570: dc.w $f041 <--- unknown instruction dc.w $0001 nop nop or.l D0,D2