Motorola M68CPU32BUG Manuel d'utilisateur télécharger pdf (Page 43)

OPERATING INSTRUCTIONS

M68332BCC/D 3-15 MOTOROLA

REV 1

The following routines are performed on the preceding program loop:

ROUTINE

TERMINAL DESCRIPTION

CPU32Bug>MD 5000;DI<CR> Display memory at address 5000

00005000 21FC0000 501C0078 MOVE.L #$501C,($78).W

00005008 23FC061E 012000FF

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

00005012 F80001C0 2500 LPSTOP.W #$2500

00005018 6000FFF8 BRA.W $5012

0000501C 307C5100 MOVEA.W #$5100,A0

00005020 327C510E MOVEA.W #$510E,A1

00005024 08390000 00FFFC0C BTST.B #$0,($FFFC0C).L

0000502C 67F6 BEQ.B $5024

CPU32Bug>MM 500C<CR>

Modify memory at location 500C.

0000500C 0120? 00FF. Change PIT time-out speed.

CPU32Bug>g 5000<CR> Go to address 5000 and begin execution.

Effective address: 00005000

PIT TIME-OUT

Periodic interrupt timer time-out message.

PIT TIME-OUT

Press the ABORT switch on the PFB to terminate the loop program.

Exception: ABORT

PC =00005018 SR =2500=TR:OFF_S_5_..... VBR =00000000

SFC =5=SD DFC =5=SD USP =0000FC00 SSP* =00010000

D0 =00000000 D1 =00000000 D2 =00000000 D3 =00000000

D4 =00000000 D5 =00000000 D6 =00000000 D7 =00000000

A0 =0000510E A1 =0000510E A2 =00000000 A3 =00000000

A4 =00000000 A5 =00000000 A6 =00000000 A7 =00010000

00005018 6000FFF8 BRA.W.W $5012

CPU32Bug>T 1<CR>

Trace one instruction.

PC =00005018 SR =2500=TR:OFF_S_5_..... VBR =00000000

SFC =5=SD DFC =5=SD USP =0000FC00 SSP* =00010000

D0 =00000000 D1 =00000000 D2 =00000000 D3 =00000000

D4 =00000000 D5 =00000000 D6 =00000000 D7 =00000000

A0 =0000510E A1 =0000510E A2 =00000000 A3 =00000000

A4 =00000000 A5 =00000000 A6 =00000000 A7 =00010000

00005012 F80001C0 2500 LPSTOP.W #$2500

CPU32Bug>BR 5034<CR>

Set breakpoint at 5034.

BREAKPOINTS

00005034

CPU32Bug>g 5000<CR>

Go to address 5000 and begin execution.

Effective address: 00005018

At Breakpoint

PC =00005034 SR =2600=TR:OFF_S_6_..... VBR =00000000

SFC =5=SD DFC =5=SD USP =0000FC00 SSP* =0000FFF8

D0 =00000000 D1 =00000000 D2 =00000000 D3 =00000000

D4 =00000000 D5 =00000000 D6 =00000000 D7 =00000000

A0 =00005101 A1 =0000510E A2 =00000000 A3 =00000000

A4 =00000000 A5 =00000000 A6 =00000000 A7 =0000FFF8

00005034 B2C8 CMPA.W A0,A1

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 67 68

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Motorola M68CPU32BUG Manuel d'utilisateur Page 43

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