67 Mag card with both program and data

[teenix]

(06-02-2022 02:25 PM)tangdfx Wrote:  Hi，Tony

Is it possible that the program and data save on the same card side.

If it is not possible on the original hp67，is it possible on your HP67C ？

Thank you.

As Dave mentioned not on the original 67.

The 67 and (C) CPU boards imitate the way the CRC chip works so that the original HP-67 microcode can work normally to read/write the cards and therefore operates the same as the original 67. This approach by HP allows different operations with the cards such as Merge.

It is possible to put any data on the cards with the CPU board but would still be limited to the 952 bits. However the chip used for the 67 CPU board does not have much spare program storage remaining and a modification such as this will require more than is available.

cheers

Tony