Re: Memory expansion on GX Message #8 Posted by Raymond Del Tondo on 27 Sept 2004, 7:04 p.m., in response to message #7 by Karl
Long time ago EPSON sold suitable 8bit EPROM cards to OEMs.
If you are lucky having bought a W&W software card for the HP-48,
like the Assembler ROM, or the Surveying Pac,
you're likely to have an EPROM card:-)
At W&W we used an EPROM burner called SprintPlus,
at home I used a small ISA slot unit called PB-10 from Needhams's Electronics.
Both have optional slots/sockets for those EPSON cards.
There were several ways to produce the image needed for the EPROM.
The easiest way was to read the contents of an HP-48 RAM card into the burner buffer,
then burning the buffer contents.
Regards,
Raymond
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