From: Gabriele Bozzi (mabuse68_at_gmail.com)
Date: 2005-12-10 17:47:03
Bo, You probably know better this than me but I am wondering if your jumpers are correctly cutted? This is a link with pictures. http://www.sothius.com/hypertxt/welcome.html?./additional/ cbm3016addition.html Replacing the chips with 4116s? GaB On 10 Dec 2005, at 16:46, Bo Zimmerman wrote: > Please forgive an obvious or potentially stupid question, but > doesn't that > mean that, since they are 16k X 1s, that they are 2k chips > (16kilobits/8 = 2 > kilobytes). So, since I have 16 of them, wouldn't that make it a 32k > machine? > > - Bo > > >> -----Original Message----- >> From: firstname.lastname@example.org >> [mailto:email@example.com] On Behalf Of Gabriele Bozzi >> Sent: Friday, December 09, 2005 6:34 AM >> To: firstname.lastname@example.org >> Subject: Re: Question about PET DRAM >> >> >> Here is an interesting posting: >> >> http://classiccmp.org/pipermail/cctalk/2002-March/069729.html >> >> ****** Attached posting ****** >> >> There were several makers that sported an xx15 type where the >> normal 16Kx1 dram was an xx16. What these were, generally >> but not in all cases, were products of a die shrink that >> resulted in a shorter refresh interval. That was certainly >> the case with the MOSTEK 4115's. Those worked famously well >> in applications like the Apple][ which was a big seller at the time. >> >> ****** End attached posting *** >> >> So, it seems to be a pin-compatible 4116.. I guess a 400ns >> item from the part number you mention (which is not unusual >> with the double nature of "phi" clocking of the 6502". I am >> not a PET expert but imho the design of this machine did not >> allow use of esotheric parts (different pin-count etc.). I >> guess good old 4116s (provided access-speed copes) should do. >> >> Gabriele >> > > > > Message was sent through the cbm-hackers mailing list > Message was sent through the cbm-hackers mailing list
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