On 2022-Feb-10, at 9:50 PM, Chuck Guzis via cctalk wrote:
> I've got a piece of gear here with a bad MC858P used as a bus
> driver--terminated in 220/330 ohms at the far end.
>
> Given that old DTL is a hit-or-miss proposition, I'm proposing to
> substitute a 7438 OC buffer. Pinout's the same, a
I've got a piece of gear here with a bad MC858P used as a bus
driver--terminated in 220/330 ohms at the far end.
Given that old DTL is a hit-or-miss proposition, I'm proposing to
substitute a 7438 OC buffer. Pinout's the same, as is Vcc.
Before I get out the soldering iron, any "don't do it" tho
> From: Warner Losh
> Do those chips have ROM numbers on them?
I have updated the:
https://gunkies.org/wiki/KD11-E_CPU
https://gunkies.org/wiki/KD11-EA_CPU
articles with the DEC part numbers for the i) microcode and ii) instruction
decode PROms.
That's not all the PROMs on the Cont
Looking at my inventory, I seem to have no less than four spare M8266
(plus one in my 11/34 that runs, plus probably another in my 11/34 out
in the garage.)
Rod, where are you located?
JRJ
On 2/9/2022 6:16 PM, Rod Smallwood via cctalk wrote:
Hi
We have narrowed the problem down.
Its t
On Thu, Feb 10, 2022 at 3:21 PM Maciej W. Rozycki via cctalk
wrote:
>
> On Thu, 10 Feb 2022, Holm Tiffe via cctalk wrote:
>
> > Has anyone a databook newer than 1989 where the PGA84 Pinout is listed?
>
> It seems like datasheetarchive.com has a copy of a 1995 datasheet listing
> what you need ("
On Thu, 10 Feb 2022, Holm Tiffe via cctalk wrote:
> Has anyone a databook newer than 1989 where the PGA84 Pinout is listed?
It seems like datasheetarchive.com has a copy of a 1995 datasheet listing
what you need ("IDT49C402/A/B 16-BIT CMOS Microprocessor Slice", IDT doc
#9011; original, not a
Hi,
I have 4 pcs. IDT49C402 Bit Slices, it is no problem to find a datasheet
for that chip..but it is an problem to find the pinout for the PGA84
Package. In all Datasheets that I've found only DIP68, LCC/PLCC68
PGA68 and CERQUAD68 are listet..
Has anyone a databook newer than 1989 where the PGA8
On Mon, Feb 7, 2022 at 8:32 PM William Sudbrink via cctalk
wrote:
> You may recall that, a few weeks ago, I requested parts help (shopping
> baskets) for the Retro Chip Tester Pro that I got for Christmas. Well,
> today's mail
> brought the last few parts and I have finished and tested it.
Cool
On 2/10/22 09:11, dwight via cctalk wrote:
> I hope you are not thinking it would test an Intel 4004 or a 8008? That would
> be a stretch. For the 4004, there is only a narrow range of frequencies it
> runs under. I'm not that familiar with the 8008 but suspect it has similar
> restrictions. Bot
I hope you are not thinking it would test an Intel 4004 or a 8008? That would
be a stretch. For the 4004, there is only a narrow range of frequencies it runs
under. I'm not that familiar with the 8008 but suspect it has similar
restrictions. Both use dynamic registers. Both use PMOS voltage leve
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