Once upon a time DS... was (other things apart) Dallas, then Maxim, now Analog Devices.
Mouser says DS 1553 & DS1643 are obsolete. However, there appears to be aftermarket activity: - https://www.radwell.co.uk/en-GB/Search/?q=ds1553 - https://www.radwell.co.uk/en-GB/Search/?q=ds1643 - which implies purchase & DIY possibilities ... Seems to be the sort of part under discussion HtH, Martin -----Original Message----- From: erik--- via cctalk [mailto:cctalk@classiccmp.org] Sent: 24 September 2023 17:24 To: cctalk@classiccmp.org Cc: e...@baigar.de Subject: [cctalk] Re: Tadpole/RDI UltraBooks - UNIX notebooks - species needs rescue... Just checked the datasheets: The NVRAMs of the UltraBooks I know of are the DS1643 and the DS1553. Both should be similar enough to be read/write by any reader that supports the DS1643 or the DS1553. Of course I'd offer creating an modified Arduino doing the task, to test it and to supply it to anyone who is willing to dump his NVRAM!!!
