Re: AW: AW: [OpenBIOS] OT: Bios access speeds

[Qiwei Xiao]

Stephan M�ller wrote:
> > > You can take a small ISA-prototype-card and a address-decoder (e.g.
> > > 74HC245).
> >
> > Sorry, the 74HC245 is no address decoder, it's an 8 bit parallel buffer
> > driver (usually used for the data bus).
>
> Hm, what else is used? I can only see this 74245 everywhere... :)

Address decoders are 74LS138 (3 to 8) and 74LS139 (dual 2 to 4). I can 
remember almost all the chips in 74 series. Newer motherboards usually 
don't use them (build the functions in LSI/VLSI/FPGA).

Qiwei
-
To Unsubscribe: send mail to [e-mail]
with "unsubscribe openbios" in the body of the message