Great News !!!

Ici, on fait dans le petit, le LCD qui déchire sa race, on y cause même calculatrices quand on est en manque !

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Inscription : 09 déc. 2012 21:51

Great News !!!

Message par hp41cx » 09 févr. 2015 23:15

I have posed my Initial Beta of HP85 Disk emulator using an AVR and
MicroSD card
Schematics included
I am spending all my time currently the documentation
I will be hosting this on github in the near future
What it does:
Emulates an AMIGO floppy ( address 700)
SS80 disk (address 710)
Plotter - captures plot data (720)
All three at the same time!
While my project can emulate more then one device at once I have yet to
add UNIT support - however the code does track the unit assignments
I tested this on an a HP85a (with either A or B series ROMs) and an
HP54645D scope)

I find that using Samsung PRO Micro SD cards avoids a write timeout
issue with some SD CARDS
(very occasionally a write can take over 100ms - when the device
internally updates an entire flash block - typically writes take 2 to 4ms)
(It is the small block random IO specs that matter and not the large
block write specs most cards advertise)

The project was bult on Ubuntu Linux using AVR GCC and avrlibc - it
would be very easy to port this to Windows using the Windows ports of
the same GCC tools and avrlibc

Mike Gore
magore at
magore at"
Systems Analyst
My passions (Facebook)
VX-8DR/Sony Z1
Focal & All Basic´s


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