HP-71B Enhanced Math LEX

[Erwin]

(08-10-2020 09:42 PM)rprosperi Wrote:  

(08-10-2020 08:21 PM)Erwin Wrote:  Today I wanted to install it in exchange of the original ROM in my FRAM71 kit on D0000 so overwrite the old mathrom. I POKEd the IRAM identifier in D0000 but it doesn't run when I tried to copy the LEX file in this port - it ends in an error. Don't want to keep it in memory cause then it is parallel to the old one.
So how can I change it without starting the whole procedure with the FRAM71 again or destroy the actual configuration?
So do you have any idea what I'm doing wrong?

Thanks in advance
Erwin

After removing the ROM and re-configuring that FRAM Port as RAM, did you FREE PORT (5.0x) to convert it to IRAM?

If so, can you copy files there and see them with CAT :PORT(5.0x), and find free space using MEM(5.0x)?

Once you can do the above things, the new LEX file should be OK.

Hi,

thanks I think I did some mistyping ... Now in the 3rd run it was successful. Here is how I did it in the end - in my case original mathrom is in Port(5.01) on adress D0000:

Code:

POKE "D0000","B3DDDDDE" ... set RAM identifier
POKE "2C004","95" ... config as RAM in the FRAM71
On/off
FREE PORT(5.01)
COPY MATH2B5:TAPE TO :PORT(5.01)
POKE "D0000","00000000" ... remove RAM identifier
POKE "2C004","D5" ... config as ROM
On/off
VER$ ... recognized Math:2b

First tests were running

best regards
Erwin