Toshiba Libretto 50CT/70CT Manual

							3.11  Hard Disk Test3  Tests and Diagnostics3-26Libretto 50CT/70CT Maintenance ManualSubtest 03Random address/data
This subtest writes random data to random addresses on the HDD cylinder,
head, and sector.  This data is then read and compared to the original data.
Subtest 04Cross talk & peak shift
This subtest writes eight types of worst pattern data (shown below) to a
cylinder, then reads the data while moving from cylinder to cylinder.
Worst pattern
dataCylinderB5ADAD0 cylinder4A52521 cylinderEB6DB62 cylinder1492493 cylinder63B63B4 cylinder9C49C45 cylinder2DB6DB6 cylinderD249247 cylinderSubtest 05Write/read/compare (CE)
This subtest writes B5ADADh worst pattern data to the CE cylinder on the
HDD, then reads the data from the CE cylinder and compares it with the
original data.
Subtest 06Write specified address
This subtest writes specified data to a specified cylinder and head on the HDD.
Subtest 07Read specified address
This subtest reads data which has been written to a specified cylinder and head
on the HDD.
Subtest 08ECC circuit
This subtest checks the Error Check and Correction (ECC) circuit functions of
the specified cylinder and head on the HDD.
Subtest 09Sequential write
This subtest writes specified 2-byte data to all of the cylinders on the HDD.
Subtest 10W-R-C specified address
This subtest writes data to a specified cylinder and head on the HDD, then
reads the data and compares it to the original data. 
						

							3 Tests and Diagnostics3.12  Real Timer TestLibretto 50CT/70CT Maintenance Manual3-273 
3.12 Real Timer TestTo execute the Real Timer Test select 9 from the Diagnostic Test Menu, press Enter and
follow the directions on the screen.  The real timer test contains three subtests that test the
real timer functions.  Move the highlight bar to the subtest you want to execute and pressEnter
.Subtest 01Real time
A new date and time can be input during this subtest.  To execute the real time
subtest follow these steps:
1. Select Subtest 01 and the following message displays:
Current date : XX-XX-XXXX
Current time : XX:XX:XX
Enter new date:
PRESS [ENTER] KEY TO EXIT TEST
2. If the current date is not correct, input the correct date at the “Enter new
date” prompt and press Enter.  The following prompt will display:
Enter new time :
3. If the current time is not correct, input the correct time in 24-hour format.
Press Enter
 to toggle between the time and the date. To exit, press Ctrl +
Break.
Subtest 02Backup memory
This subtest performs the following backup memory check:
Writes 1-bit of “on” data to addresses 01h; 02h, 04h through 80h
Writes 1-bit of “off” data to addresses FEh, FB, FD through 7Fh
Writes the data patterns AAh and 55h to 50-byte memory
(addresses 0Eh to 7Fh)
The subtest reads and compares this data with the original data.
To exit, press Ctrl + Break. 
						

							3.12  Real Timer Test3 Tests and Diagnostics3-28Libretto 50CT/70CT Maintenance ManualSubtest 03Real time carry
CAUTION:  When this subtest is executed, the current date and time areerased.This subtest checks the real time clock increments, making sure the date and
time are displayed in the following format:
Current date:12-31-1995
Current time:23:59:58
Press Enter to display the following:
Current date :01-01-1996
Current time :00:00:00
PRESS [Enter] KEY TO EXIT TEST
Press Ctrl + Break to exit. 
						

							3 Tests and Diagnostics3.13  NDP TestLibretto 50CT/70CT Maintenance Manual3-293.13 NDP Test
To execute the NDP test select 10 from the Diagnostics Test Menu, press Enter and follow
the directions on the screen.  The NDP test contains one subtest that tests the NDP functions.
Subtest 01NDP Test
This test checks the following functions of the coprocessor:
q Control word
q Status word
q Bus
q Addition
q Multiplication
Press Ctrl + Break to exit. 
						

							3.14  Expansion Test3 Tests and Diagnostics3-30Libretto 50CT/70CT Maintenance Manual3.14 Expansion Test
To execute the Expansion Test select 11 from the Diagnostics Test Menu, press Enter and
follow the directions on the screen. The expansion test contains one subtest.
NOTE:  To execute this subtest, the PC card wraparound connector is required.Subtest 01PCMCIA wraparound
This test checks the following signal line of the PC card slot:
q Address line
q REG#, CE#1, CE#2 line
q Data line
q Speaker line
q Wait line
q BSY#, BVD1 line
This subtest is executed in the following order:
Sub#AddressGoodBadContents0100001
00001nn
nnxx
xxAddress line
REG#, CE#1, CE#2
nn=A0, 90, 80, 000200002wwrrData line
ww=write data,rr=read data0300003––––Speaker line040000440, 80xxWait line (40
						

							3 Tests and Diagnostics3.15  Sound TestLibretto 50CT/70CT Maintenance Manual3-313.15 Sound Test
To execute the Sound Test select 12 from the Diagnostics Test Menu, press Enter and follow
the directions on the screen.  The sound test contains two subtests that test the sound
functions.
NOTE:  To execute this subtest, the internal microphone and external headphone (orexternal speaker) are required.WARNING:  The system is capable of producing high volume sound, so when you use theheadphones, be careful to set the volume low and adjust it as necessary. Using theheadphones at full volume could damage your hearing.Subtest 01FM synthesizer
Load the COM file. Connect headphones or speakers, and execute the OPL3-
SA3 (YMF711) function test. The eight-note musical should play through both
sides of the headphones or through both speakers.
Subtest 02SINE-wave playback
Load the COM file. This subtest expands the sine-wave data table to 64KB and
creates sine-wave data.  The play data is transferred between DMA and
CODEC, and plays the sound. (It is a long beep.) Use the oscilloscope to
observe the sine-wave form. 
						

							3.16  Error Codes and Error Status Names3 Tests and Diagnostics3-32Libretto 50CT/70CT Maintenance Manual3.16 Error Codes and Error Status NamesTable 3-2 lists the error codes and error status names for the diagnostics tests.Table 3-2  Error codes and error status names (1/3)Device nameError codeError status name(COMMON)FFData Compare ErrorSystem01ROM Checksum ErrorMemory01Parity Error02Protected Mode Not Changed14Memory Read/Write ErrorDDCache Memory ErrorKeyboard01Mouse Interface Error02IPS Interface Error03Interface Error04Retransmit Error05Mouse Handler Not Supported06PS/2 Mouse & IPS Not SupportedFDD01Bad Command02Address Mark Not Found03Write Protected04Record Not Found06Media Removed08DMA Overrun Error09DMA Boundary Error10CRC Error20FDC Error40Seek Error60FDD Not In Drive Error80Time Out ErrorEEWrite Buffer ErrorPrinter01Time Out08Fault10Select Line20Out of Paper40Power Off80Busy LineASYNC01DSR On Time Out02CTS On Time Out04RX-READY Time Out 
						

							3 Tests and Diagnostics3.16  Error Codes and Error Status NamesLibretto 50CT/70CT Maintenance Manual3-33Table 3-2  Error codes and error status names (2/3)Device nameError codeError status nameASYNC (cont.)08TX-BUFFER Full Time Out10Parity Error20Framing Error40Overrun Error80Line Status Error88Modem Status Error33No Carrier (Card Modem)34Error (Card Modem)36No Dial Tone (Card Modem)HDD01Bad Command Error02Address Mark Not Found04Record Not Found05HDC Not Reset Error07Drive Not Initialized08HDC Overrun (DRQ)09DMA Boundary Error0ABad Sector0BBad Track Error10ECC Error11ECC Recover Enabled20HDC Error40Seek Error80Time Out ErrorAADrive Not ReadyBBUndefined ErrorCCWrite FaultE0Status ErrorEEAccess Time Out ErrorNDP01No Co-Processor02Control Word Error03Status Word Error04Bus Error05Addition Error06Multiply Error 
						

							3.16  Error Codes and Error Status Names3 Tests and Diagnostics3-34Libretto 50CT/70CT Maintenance ManualTable 3-2  Error codes and error status names (3/3)Device nameError codeError status namePCMCIAC1Address Line ErrorC2REG# Line ErrorC3CE#1 Line ErrorC4CE#2 Line ErrorC5DATA Line ErrorC6WAIT Line ErrorC7BSY# Line ErrorC8BVD1 Line ErrorCDNo PCMCIA 
						

							3 Tests and Diagnostics3.17  Hard Disk Test Detail StatusLibretto 50CT/70CT Maintenance Manual3-353.17 Hard Disk Test Detail Status
When an error occurs in the hard disk test, the following message displays:
HDC status = XXXXXXXXDetailed information about the hard disk test error displays on the screen by an eight-digit
number.  The first four digits represent the hard disk controller (HDC) error status number
and the last four digits are not used.
The hard disk controller error status is composed of 2 bytes; the first byte displays the
contents of the HDC status register in hexadecimal form and the second byte displays the
HDC error register.
The contents of the HDC status register and error register are listed in Tables 3-3 and 3-4.Table 3-3  Hard disk controller status register contents
BitNameDescription7BSY
“0” — HDC is ready(Busy)
“1” — HDC is busy6DRDY
“0” — Hard disk drive is not ready to accept any command(Drive ready)
“1” — Hard disk drive is ready to accept any command5DWF
“0” — DWF error is not detected(Drive write
fault)“1” — Write fault condition occurs4DSC
(Drive seek
complete“0” — The hard disk drive heads are not settled over a track
“1” — The hard disk drive heads are settled over a track3DRQ
“0” — Drive is not ready for data transfer(Data
request)“1” — Drive is ready for data transfer2CORR
(Corrected
data)“0” — Not used
“1” — Correctable data error is corrected1IDX
“0” — Not used(Index)
“1” — Index is sensed0ERR
“0” — Normal(Error)
“1” — The previous command was terminated with some error