40009 ROM Replacement

[pledg]

Hi,


Some advice required please.


I'm repairing a CPC464. (see other post).


I have a TL866II plus eeprom programmer.


I think the board I'm working on may have a damaged ROM chip, I'm getting garbled screens on start-up (see other post).


If I swap this ROM with another I have from a donor board I get no screen output at all.


I take this to mean that the existing ROM is corrupted in some way and the ROM from the donor board is totally dead.


If I read these chips with the TL866II this seems to confirm this. The donor ROM reads as blank but the other loads data into the programmer.


Is it a simple task to write the OS and Basic to a new eeprom and install?


I have downloaded the os_basic_1.01 file from another post.


Any tips appreciated!


Thanks.

[Bryce]

Yes, but make sure the file you have is both the Firmware AND Basic (32K). There are many versions online with the two halves split.

Bryce.

[Audronic]

Amstrad 40009- Rom Ready for Eprom


Ray

[pledg]

Thanks for the link.


Waiting for some eeproms but as soon as they arrive I'll get going and report back.


Cheers


Paul

[pledg]

Just to confirm this file is 464 ready and no amendments required.


Paul.