S3 Will not load HELP from ROM or via serial port
Posted: 10 Nov 2011 15:52
I know that the S3 is now obsolete but I would be grateful for any pointers.
My battery has died and I am powering the unit from a bench PSU (9V @ 500mA). On power up I get 'DATAMAN S3'. I have tried both documented methods to load the help file.
If I use the ROM (a 27C64 which I blew on another programmer-checksum is correct) is just says 'INSTALL HELP' and then goes back to 'DATAMAN S3'.
If I use the serial port, the hex file downloads and gives a CHECKSUM error. The sound from the speaker sounds OK until the file reaches a section with a long line of FFs. At this point the sound changes dramatically. What has been downloaded does not checksum correctly using CH E000,FFFF.
Any advice would be gratefully received.
Kevin Stewart
My battery has died and I am powering the unit from a bench PSU (9V @ 500mA). On power up I get 'DATAMAN S3'. I have tried both documented methods to load the help file.
If I use the ROM (a 27C64 which I blew on another programmer-checksum is correct) is just says 'INSTALL HELP' and then goes back to 'DATAMAN S3'.
If I use the serial port, the hex file downloads and gives a CHECKSUM error. The sound from the speaker sounds OK until the file reaches a section with a long line of FFs. At this point the sound changes dramatically. What has been downloaded does not checksum correctly using CH E000,FFFF.
Any advice would be gratefully received.
Kevin Stewart