Name: Manual for PX-8
Brand: EPSON
Availability: InStock

Troubleshooting and error codes

Message	Meaning
?	This message has four possible meanings: 1) DDT does not understand the assembly language instruction. 2) The file cannot be opened. 3) A checksum error occurred in a HEX file. 4) The assembler/disassembler was overlayed.
ABORTED	You stopped a PIP operation by pressing a key.
ASM Error Messages	D Data error: data statement element cannot be plac- ed in specified data area. E Expression error: expression cannot be evaluated during assembly. L Label error: label cannot appear in this context (might be duplicate label). N Not implemented: unimplemented features, such as macros, are trapped. O Overflow: expression is too complex to evaluate. P Phase error: label value changes on two passes through assembly. R Register error: the value specified as a register is in- compatible with the code. S Syntax error: improperly formed expression.
BAD DELIMITER	U Underlined label: label used does not exist. V Value error: improperly formed operand en- countered in an expression.
Bad Load	Check command line for typing errors.
Bdos Err On d:	CCP error message, or SAVE error message.
Bdos Err On d: Bad Sector	Basic Disk Operating System Error on the designated drive: CP/M replaces d: with the drive specification of the drive where the error occurred. This message is followed by one of the four phrases in the situations described below. This message appears when CP/M finds no disk in the drive, when the disk is improperly formatted, when the drive latch is open, or when power to the drive is off. Check for one of these situations and try again. This could also indicate a hardware problem or a worn or im- properly formatted disk. Press CTRL-C to terminate the program and return to CP/M, or press the return key to ignore the error.
Bdos Err On d: File R/O	You tried to erase, rename, or set file attributes on a Read-Only file. The file should first be set to Ready- Write (RW) with the command: "STAT filespec $R/W."
Bdos Err On d: R/O	Drive has been assigned Read Only status with a STAT command, or the disk in the drive has been changed without being initialized with a CTRL-C. CP/M ter- minates the current program as soon as you press any key.
Bdos Err on d: Select	CP/M received a command line specifying a nonexistent drive. CP/M terminates the current program as soon as you press any key. Press return key or CTRL-C to recover.
Break "x" at c	"x" is one of the symbols described below and c is the command letter being executed when the error occurred. # Search failure. ED cannot find the string specified in an F, S, or N command. ? Unrecognized command letter c. ED does not recognize the indicated command letter, or an E, H, Q, or O command is not alone on its command line. O The file specified in an R command cannot be found.
CANNOT CLOSE DESTINATION FILE- {filespec}	> Buffer full. ED cannot put any more characters in the memory buffer, or the string specified in an F, N, or S command is too long. E Command aborted. A keystroke at the console aborted command execution. F Disk or directory full. This error is followed by either the disk or directory full message. Refer to the recovery procedures listed under these messages.
Cannot close, R/O CANNOT CLOSE FILES	An output file cannot be closed. You should take appropriate action after checking to see if the correct disk is in the drive and that the disk is not write pro- tected.
CANNOT READ	CP/M cannot write to the file. This usually occurs because the disk is write-protected.
CANNOT WRITE	An output file cannot be closed. This is a fatal error that terminates ASM execution. Check to see that the disk is in the drive, and that the disk is not write- protected.
Checksum error	The disk file written by a W command cannot be clos- ed. This is a fatal error that terminates DDT execution. Check if the correct disk is in the drive and that the disk is not write-protected.
CHECKSUM ERROR LOAD ADDRESS hhhh ERROR ADDRESS hhhh BYTES READ: hhhh:	This error can occur during SUBMIT file processing. Check if the correct system disk is in the A drive and that the disk is not write-protected. The SUBMIT job can be restarted after rebooting CP/M.
Command Buffer Overflow	PIP cannot read the specified source. Reader may not be implemented.
Command too long	The destination specified in the PIP command is illegal. You probably specified an input device as a destination.
CORRECT ERROR, TYPE RETURN OR CTRL-Z	A hex record checksum error was encountered during the transfer of a hex file. The hex file with the checksum error should be corrected, probably by recreating the hex file.
DESTINATION IS R/O, DELETE (Y/N)?	The destination file specified in a PIP command already exists and it is Read Only. If you type Y, the destination file is deleted before the file copy is done.
Directory full	There is not enough directory space for file being writ- ten to the destination disk. You can use the OX filespec command to erase any unnecessary files on the disk without leaving the editor.
Disk full	There is not enough directory space to write the $$$.SUB file used for processing SUBMITs. Erase some files or select a new disk and retry.
DISK READ ERROR- {filespec}	There is not enough disk space for the output file. This error can occur on the W, E, H, or X commands. If it occurs with X command, you can repeat the command prefixing the filename with a different drive.
DISK WRITE ERROR- {filespec}	The input disk file specified in a PIP command cannot be read properly. This is usually the result of an unex- pected end-of-file. Correct the problem in your file.
ERROR: BAD PARAMETER	A disk write operation cannot be successfully perform- ed during a W command, probably due to a full disk. You should either erase some unnecessary files or get another disk with more space.
ERROR: CANNOT OPEN SOURCE, LOAD ADDRESS hhhh	A disk write operation cannot be successfully perform- ed during a PIP command, probably due to a full disk. You should either erase some unnecessary files or get another disk with more space and execute PIP again.
ERROR: CANNOT CLOSE FILE, LOAD ADDRESS hhhh	The SUBMIT program cannot write the $$$.SUB file to the disk. Erase some files, or select a new disk and try again.
ERROR: CANNOT OPEN SOURCE, LOAD ADDRESS hhhh	You entered an illegal parameter in a PIP command. Retype the entry correctly.
ERROR: DISK READ, LOAD ADDRESS hhhh	Displayed if LOAD cannot find the specified file or if no filename is specified.
ERROR: DISK WRITE, LOAD ADDRESS hhhh	Caused by an error code returned by a BDOS function call. Disk may be write protected.
ERROR: INVERTED LOAD ADDRESS, LOAD ADDRESS hhhh	Cannot find source file. Check disk directory.
ERROR: NO MORE DIRECTORY SPACE, LOAD ADDRESS hhhh	Caused by an error code returned by a BDOS function call.
Error on line nnn message	Destination Disk is full.
FILE ERROR	The address of a record was too far from the address of the previously-processed record. This is an internal limitation of LOAD, but it can be circumvented. Use DDT to read the hexfile into memory, then use a SAVE command to store the memory image file on disk.
FILE EXISTS	The SUBMIT program displays its messages in the for- mat shown above, where nnn represents the line number of the SUBMIT file. Refer to the message following the line number.

Manual for PX-8

Chapter 1 OVERVIEW

1.1 Unpacking Notes

1.2 Hardware Configuration

1.2.1 Configuration diagram

1.2.2 The Carrying handle

1.2.3 The keyboard

1.2.4 Display

1.2.5 CPU and memory

1.2.6 Microcassette tape deck

1.3 Software Configuration

1.3.1 Operating systems

1.3.2 Utilities

Chapter 2 STARTING UP AND OPERATING THE PX-8

2.1 Starting Up

2.1.1 Precautions

2.1.2 Before switching on

2.1.3 Initialization

2.2 Operating The Computer

2.2.1 The Keyboard

2.2.2 Switching the PX-8 on and off

2.2.3 The PX-8 operating system modules

System Display module

Troubleshooting and error codes