(SOLVED) 41CL - DOUBLE HEPAX ACCESS and MMU CONFIG

[Monte Dalrymple]

(08-20-2019 12:53 PM)Podalirius Wrote:  Hi, I tried to install your instructions, but I have a little problem:
I executed:
ON <--, MEMORY LOST
MMUDIS
MMUCLR
"YFNX" PLUG1U
"YFNF" PLUG2L without it I am not able to use CFGINI
MMUEN
I saved this in MMU 0 and MMU 1 as a backup
XEQ CFGINI
XEQ RCLCFG 4
"WARP 7" XEQ PPLUG
ERROR LOCK
I tried UNLOCK 7
OK
"WARP 7" PPLUG
ERROR DUPLICATE ROM 15
BAD CONFIGURATION
I stopped. I need more help or I am useless at 41CL!!
Maybe it is because my first pocket computer was an hp 48SX,
than I used/programmed hp 48GX, 49G and now the 50g.
It is possible that I not understood the logic of the 41CL.
Anyway, I thank you so much!!

The step "YFNX" PLUG1U is the problem. As the manual clearly states, YFNX must be in the same page between the current and new configuration. When you do the RCLCFG 4 the new YFNX is loaded into page 7 and locked. But at the same time the old YFNX is still in page 9 and locked. You cannot unlock YFNX. It protects itself from user errors by always locking itself.

I am working on a change to YFNX which will allow YFNX to be in a different page in the new configuration, but it's going to take a while. There are a lot of edge cases to handle and not a lot of space in the image.