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Re: [f-cpu] new manual version
Yann Guidon wrote:
>
> hello,
>
> Cedric has recently made a new version of the F-CPU manual rev. 0.2.3,
> seeing that Olivier was really, really slow. There is only the
> english version currently. And a lot of work is still required !
> but it's better than nothing. You'll find the archive at
> http://f-cpu.seul.org/new under the name F-CPU_manual-0.2.4-en.tgz
> (i have not yet reviewed it)
>
> WHYGEE
It looks good. Now that I have docs to read; Is the logic function
decoding for the ROP2 fixed at this time. It looked messy to me
so I have what may be cleaner version.
FABN
LLLL A and B
LLLH A nand B
LLHL A and ~B
LLHH A nand ~B
LHLL ~A and B
LHLH ~A nand B
LHHL ~A and ~B
LHHH ~A nand ~B
HHLL 0 xnor 0 (1)
HLLH 0 xor 0 (0)
HLHL 0 xnor B ~B
HLHH 0 xor B B
HHLL A xnor 0 A
HHLH A xor 0 B
HHHL A xnor B
HHHH A xor B
TempA = InA * A
+ /InA * /A * /F ; pre process bit A
TempB = InB * B
+ /InB * /B * /F ; pre process bit B
TempC = / TempA * / TempB * F
+ TempA * TempB ; xnor , and selection
Out = TempC xor N ; Negate output if needed
--
Ben Franchuk - Dawn * 12/24 bit cpu *
www.jetnet.ab.ca/users/bfranchuk/index.html
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