Re: FPGA PDP8e

From	Rich Alderson <news@alderson.users.panix.com>
Newsgroups	alt.sys.pdp8
Subject	Re: FPGA PDP8e
Date	2022-04-02 21:13 -0400
Organization	PANIX Public Access Internet and UNIX, NYC
Message-ID	<mddy20narzt.fsf@panix5.panix.com> (permalink)
References	<ec6038dc-2dee-428a-babb-7918ffe4cfb6n@googlegroups.com> <mddbkxk2vn0.fsf@panix5.panix.com> <woZ1K.501471$Rza5.332025@fx47.iad> <9489c9c3-b91f-460f-93a5-3d9234d5db33n@googlegroups.com>

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David Armstrong <davidarmstrong360@gmail.com> writes:

> On Saturday, April 2, 2022 at 8:50:08 AM UTC-6, Scott Lurndal wrote:
> > Rich Alderson <ne...@alderson.users.panix.com> writes:=20

>>> Just curious: Since you went beyond the single field 4KW memory anyway, why
>>> not go all the way to 32KW?

>> I believe that David noted that he was using pretty much=20
>> all the available RAM on the FPGA he was using.

> Yes, that is correct, I use 24 of the 32 RAM blocks on the FPGA.  There is
> another member of this FPGA family, the ICE40up5K, which would have enough
> RAM for the full 32K or even the 128K of the PDP8a, but it does not have
> enough dedicated IO to deal with the LEDs and switches without extra
> circuitry.  I really did not want to give up the blinken lights.

OK, curiosity satisfied.  Thank you.

-- 
Rich Alderson					  news@alderson.users.panix.com
      Audendum est, et veritas investiganda; quam etiamsi non assequamur,
	  omnino tamen proprius, quam nunc sumus, ad eam perveniemus.
									--Galen

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FPGA PDP8e David Armstrong <davidarmstrong360@gmail.com> - 2022-03-31 18:04 -0700
  Re: FPGA PDP8e Rich Alderson <news@alderson.users.panix.com> - 2022-04-01 20:09 -0400
    Re: FPGA PDP8e scott@slp53.sl.home (Scott Lurndal) - 2022-04-02 14:50 +0000
      Re: FPGA PDP8e David Armstrong <davidarmstrong360@gmail.com> - 2022-04-02 12:32 -0700
        Re: FPGA PDP8e Rich Alderson <news@alderson.users.panix.com> - 2022-04-02 21:13 -0400
  Re: FPGA PDP8e Tom Hunter <thunter6600@gmail.com> - 2022-04-03 05:07 -0700
    Re: FPGA PDP8e Rob Doyle <radioengr@gmail.com> - 2022-04-03 12:24 -0700
      Re: FPGA PDP8e Tom Hunter <thunter6600@gmail.com> - 2022-04-04 01:49 -0700
        Re: FPGA PDP8e David Armstrong <davidarmstrong360@gmail.com> - 2022-04-04 08:28 -0700
          Re: FPGA PDP8e Tom Hunter <thunter6600@gmail.com> - 2022-04-04 09:14 -0700
            Re: FPGA PDP8e David Armstrong <davidarmstrong360@gmail.com> - 2022-04-04 14:09 -0700
        Re: FPGA PDP8e (Attn Rob Doyle) Tom Hunter <thunter6600@gmail.com> - 2022-04-12 23:18 -0700
          Re: FPGA PDP8e (Attn Rob Doyle) Rob Doyle <radioengr@gmail.com> - 2022-04-15 16:39 -0700

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