27 Jun
2009
27 Jun
'09
6:52 p.m.
On Jun 27, 2009, at 5:08 PM, Fred Cisin wrote:
On Sat, 27 Jun 2009, Lyle Bickley wrote:
Note: that there are iPhone HP calculators that are based on Eric's
code long before HP posted their versions that were referenced in the
Macworld article.
Rumor has it that HP contacted Eric for his ROM images because they
(HP) *lost* all of the bits.
What Eric has done is truly phenomenal. He *reverse engineered* the
ROM data *and* the CPU instruction set from the actual calculators
(according to Eric you can't just read the ROM, you have to execute
the instructions). Eric's emulations *are* HP calculators in all but
silicon and plastic. They emulate the underlying CPU and run the
captured ROM images from the actual calculators.
TTFN - Guy
If you want to see a "labor of love" in
HP Calculator simulation,
look
at Eric Smith's "High-Fidelity Calculator Simulator" goodies at:
http://nonpareil.brouhaha.com/
. . .
HP-31E, HP-33C, HP-34C, HP-37E, HP-38E, HP-38C
HP-41CV, HP-41CX
BTW: The iPhone HP calulator similations are based on Eric's
licensed code.
OOops!
I owe Eric an apology; I didn't even know that he was doing calculator
emulations!