Self modifying code, lambda calculus - Re: ENIAC programming
bfranchuk at jetnet.ab.ca
Fri Sep 18 13:39:47 CDT 2015
On 9/18/2015 7:33 AM, tony duell wrote:
>>> Are there any computers that do let you put microcode into RAM
>> "Now-days"? There are some that do that, some of which are still in
>> operational shape. Some VAXen, in particular, have something called
>> "writable control store", which is essentially microcode RAM.
> As far as I know, the VAX11/730 (There is one next to me waiting for me to have time
> to restore it) has the microcode entirely in RAM. Classic PERQs (3 in the next room) have
> their microcode entirely in RAM too (in that case, there is a microcode boot ROM to load
> the microcode from disk, but it is switched out after the microcode is loaded).
VAX and PREQ's are not something I go to Wallmart and pick up for
$147.95 with some bread and T-shirts.
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