FPGA VAX update

[woodelf]

Brian Wheeler wrote:

>I took a hardware class where we (each team of 2 students) had to build
>a PDP-8 using PALs, some 74xx chips, a bit of Static RAM, and a ton of
>wire wrapping.  The final exam consisted of the instructor breaking each
>machine in 5 different ways and we 3 hours to fix it.  That was a pretty
>cool class.
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What type of 8 did you model and did you leave out any features like 
extended memory?

>I hear they use FPGAs now in the class...kids these days.
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I grumble that the FPGA's now days have built in hardware features that hide
real logic slowdowns like external memory or slow ripple carry.

>Brian
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