Re: Is it possible to build a modern Apple][?

[Mark McDougall <markm@vl.com.au>]

johnson@tmfc.net wrote:

> More than 20 years after the birth of Apple ][, we now have many high
>  density RAM chips, some LSI chips can replace the 74LSxxx, can we
> build a much simpler Apple][?

How about 1 chip - an FPGA!!!

But yes, you could do a "simpler" version (less chips). For example, 
replace all the DRAMs (memory chips) with a single SRAM, or even DPRAM 
(dual-port) and re-do the video timing. You could replace a lot of the 
decode logic (74XXX) with a single GAL/PAL/CPLD. It's a matter of how 
far you want to deviate from the original design.

Regards,

--
Mark McDougall, Engineer
Virtual Logic Pty Ltd, <http://www.vl.com.au>
21-25 King St, Rockdale, 2216
Ph: +612-9599-3255 Fax: +612-9599-3266