How do I format an HP-48GX FRAM Card?

[JanS]

Unless you merged the 128K Memory Card in physical Slot one with the Main Memory, your PINIT Command should be fine. Here's more information about the quirks of Memory Cards in the two different Slots and their respective PORT assignments.

https://www.hpmuseum.org/cgi-sys/cgiwrap...read=89814
https://www.drehersoft.com/managing-hp-48sx48gx-ports/

Basically PORT is a 128KB Memory Object. PORT 0 on a GX is the 128K internal RAM. PORT 1 becomes whatever 128K is available in physical card slot 1 or 2, whichever is populated. If both are populated, the 128K in physical slot 1 becomes PORT1, any subsequent 128K Memory chunks available in physical slot 2 become port 2, 3 etc.

Physical Slot 1 is special in two ways:
1) Only 128K are usable and therefore only a 128K card is officially supported
2) a 128K card in physical slot one by default becomes PORT1, but can be merged with main memory (and the card then cannot be removed before unmerging or you will encounter a memory lost condition)


hope that helps.