Retrotronik RAM card for HP 48GX

[rprosperi]

I have received one of the correct Retrotronik RAM cards and can happily recommend it for purchase and use. This card has the correct (thinner) shell and I had no issues at all during testing and use.

Specifically, I checked and verified the following:

Retrotronik (R) Card inserts into both 48GX slots with no problem

R Card inserts into both 48SX slots with no problem

R Card can be inserted into both slots 1 & 2 in 48GX with another card already installed

Another card can be inserted into both slots 1 & 2 with R Card already installed

Data can be written to and then read back from the R Card as expected

Data is retained in the R Card when removed from a machine and later reinstalled

When checking in slot-1 with [ON]+[F4] on a 48GX, system displays hash screen (I believe this represents the bits in R Card’s memory, bit=on -> pixel=on, etc.), then reports “RAM2 90000”, which is the exact same behavior I see for a known, tested RAM card.

When checking in slot-2 with [ON]+[F4] on a 48GX, system reports “RAM2 OK 128K”

When checking in slot-1 with [ON]+[F4] on a 48SX, system reports “RAM1 OK 128K”

When checking in slot-2 with [ON]+[F4] on a 48SX, system reports “RAM2 OK 128K”

Big thanks to João for his friendly communication and actions to promptly halt sales until corrective action was confirmed, quickly asses and correct the problem, and dispatch a unit for independent confirmation.

It’s great to see another new member and vendor, expanding and extending the life of these machines!