08-02-2026, 01:57 PM
ChickenMan, I did the CF mod.to.my 128k Prem years ago and it worked well when it worked, then would occasionally corrupt the CF card whereby I'd have to redo it all. I'm aware that some mods to bios were done over time to address this and from memory the lates version only made my situation worse.
My questions to you (or others who helped get this all working) are:
A) Is CF Rdy/Bsy pin 37 being used? (CF ready to Z80 interrupt, or other?)
B) Is CF wait/IORdy pin 42 being used? (CF wait to Z80 wait)
C) Does MBee bios do any pre-write read as a check that the CF card is indeed ready to be written to, or does it solely rely on above signal(s)?
D) Does the bios command the CF card with Ox01 parameter thereby placing it into 8 bit IDE mode, or does the CF Mod attempt an 8 bit mode by holding specific pins either high or low (i've read there's two 8 bit modes possible, memory mapped and IDE. I assume MBee goes for 8 bit true IDE mode ?).
I ask such questions as when i finally get back to my Bee, i want CF to work reliably and expect your reply to be of help.
Thanks.
My questions to you (or others who helped get this all working) are:
A) Is CF Rdy/Bsy pin 37 being used? (CF ready to Z80 interrupt, or other?)
B) Is CF wait/IORdy pin 42 being used? (CF wait to Z80 wait)
C) Does MBee bios do any pre-write read as a check that the CF card is indeed ready to be written to, or does it solely rely on above signal(s)?
D) Does the bios command the CF card with Ox01 parameter thereby placing it into 8 bit IDE mode, or does the CF Mod attempt an 8 bit mode by holding specific pins either high or low (i've read there's two 8 bit modes possible, memory mapped and IDE. I assume MBee goes for 8 bit true IDE mode ?).
I ask such questions as when i finally get back to my Bee, i want CF to work reliably and expect your reply to be of help.
Thanks.