I have one Seiko 128K RAM card for the HP 48GX, doesn´t have battery, when I put on my 48GX shows nothing, including when I do the autotest of the cards. (ON-D)
thanks
The cards for the 48SX and 48GX were customized versions of the Seiko/Epson cards (non-PCMCIA) that would work down to a lower voltage. The standard cards can cause problems as the calculator's batteries get low.
ON-D gets you to test mode, but how do you go from there to testing the card?
While the three vertical lines are shown, simply press the up-arrow key.
This will test both port 1 and port 2 RAM non-destructively.
Don't worry if both ports are shown as on address #90000,
they're simply reconfigured during the test.
HTH
Raymond