Commodore 1571 - Page 23

1571/128D LOGIC DIAGNOSTIC
VERSION 1.2.1
* If (Y)es is selected, the Activity LED Flash Sequence is interpreted
using the Error Flash Code Chart
+
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ERROR FLASH CODE CHART
FLASH
CODES
1571 IC
FAILURE
1571 IC
LOCATION
128D IC
FAILURE
128D IC
LOCATION
1 FLASH
SYSTEM OK
NO FAILURE SYSTEM OK
NO FAILURE
2 FLASHES
DOS ROM U02 DOS ROM
U102
3 FLASHES
DOS RAM
U03 DOS RAM
U103
4 FLASHES
6522 VIA U04 6522 VIA
U104
5 FLASHES
6522 VIA
U09
6522 VIA
U106
6 FLASHES
6526/8520
U20 ILLEGAL
7 FLASHES
WD1770
Ull
7 FLASHES
5710 FDC
U107
ONCE A SUCCESSFUL DOWNLOAD IS COMPLETE THE LOGIC DIAGNOSTIC WILL
OPERATE COMPLETELY INTERNAL TO THE DRIVE AND THE C128 (1571 ONLY)
NO LONGER NEED BE CONNECTED
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* Press RETURN - Return To Menu
Displays Logic Diagnostic Main Menu
LOGIC DIAGNOSTIC OPTION THREE - LOAD DIAGNOSTIC MENU
* Once The Logic Diagnostic Code Has Been Downloaded, The Drive Must
Be Reset Before Any Disk Access Can Be Accomplished
* 1571 - Turn Drive Power OFF and ON
* C128D - Press Drive RESET SWITCH
* Press (8) - Load Diagnostic Menu from Device Number [8]
* Press (9) - Load Diagnostic Menu from Device Number [9]
* Press RETURN - Return To Menu
Displays Logic Diagnostic Main Menu
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