Motorola M68CPU32BUG User Manual download pdf (Page 42)

OPERATING INSTRUCTIONS

M68332BCC/D 3-14 MOTOROLA

REV 1

After entering the PIT time-out program display the instructions at location $5000

EXAMPLE PROGRAM

PROGRAM DESCRIPTION

CPU32Bug>MD 5000;DI<CR> Display memory at location $5000 with

disassembly option.

5000 21FC0000 501C0078 MOVE.L #$501C,($78).W

5008 23FC061E 012000FF

FA22 MOVE.L #$061E0120,($FFFA22).L

5012 F80001C0 2500 LPSTOP.W #$2500

5018 6000FFF8 BRA.W $5012

501C 307C5100 MOVEA.W #$5100,A0

5020 327C510E MOVEA.W #$510E,A1

5024 08390000 00FFFC0C BTST.B #$0,($FFFC0C).L

502C 67F6 BEQ.B $5024

CPU32Bug><CR>

Display next eight instructions.

502E 13D800FF FC0F MOVE.B (A0)+,(FFFC0F).L

5034 B2C8 CMPA.W A0,A1

5036 6600FFEC BNE.W $5024

503A 4E73 RTE

503C 0000FFFF ORI.B #$FF,D0

5040 0000FFFF ORI.B #$FF,D0

5044 0000FFFF ORI.B #$FF,D0

5048 0000FFFF ORI.B #$FF,D0

The message displayed on the terminal

CPU32Bug>MD 5100<CR>

00005100 5049 5420 5449 4D45 2D4F 5554 0D0A FFFF PIT TIME-OUT....

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 67 68

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Motorola M68CPU32BUG User Manual Page 42