Re: [f-cpu] new manual version

[Ben Franchuk <bfranchuk@jetnet.ab.ca>]

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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