Excessive SRAM in PCMCIA and SIMM in board

[fc.studio]

I don't know...

1- what do A600 & A1200 detect when an SRAM card greater than 4 MB is used in the PCMCIA port?

2- what does A1200 detect when, in a RAM or turbo board, the installed SIMM has a capacity greater than what that board can support?

Do you know? Thanks.

[Toni Wilen]

1- what do A600 & A1200 detect when an SRAM card greater than 4 MB is used in the PCMCIA port?


4M of RAM. Not enough address lines to see extra RAM. (edit: original answer was answer to wrong question)

edit2: there is reserved space for ram banking in gayle documentation but it was never implemented in hardware..

2- what does A1200 detect when, in a RAM or turbo board, the installed SIMM has a capacity greater than what that board can support?


Most likely nothing, not enough address lines to see the "extra" RAM.

[fc.studio]

Is there the risk, for both, they can't work for nothing... that is 0 MB RAM is detected?

[Toni Wilen]

Is there the risk, for both, they can't work for nothing... that is 0 MB RAM is detected?

Unfortunately it is always possible :(
(or unstability or other wrong memory size)

"Huge" PCMCIA SRAM most likely will work (as long as size calculation in software does not overflow or something like that..)

[Jope]

Unfortunately it is always possible :(
(or unstability or other wrong memory size)

Yes.. In the worst case the surplus address lines are left floating and that would cause bad things.. :-(

[fc.studio]

Thanks for the info.