From: Baltissen, GJPAA (Ruud) (ruud.baltissen_at_abp.nl)
Date: 2003-10-22 08:25:55
Hallo Groepaz,
> > which tells us differently: That the original LPT was built
> > discreetly (74LS125, 74LS174, 74LS244, 74LS374)
Correct.
> ooh...when did they start using integrated i/o chips then? i
> mean....it wouldnt
> be in every second docfile if it was never used :)
I don't know. But I have an old UMC databook (1986) describing the 87C11, a
LPT-port in one IC. You only had to add some invertors to generate the
needed base address. Various clones of the famous Hercules Monochrome
Graphic card put almost all there electronics in one IC. The Tidalwave MGP
only has a VLSI-IC, a ROM and two 41464-DRAMs onboard.
--
___
/ __|__
/ / |_/ Groetjes, Ruud
\ \__|_\
\___| http://Ruud.C64.org
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