I suspect the answer to question #1 is no, but thought I would ask.
1) Anyone happen to have a known working Digitalker 54104 IC they are
looking to trade for some cash that does not involve me selling an arm
or a leg :-)?
2) Barring that, anyone have a known working Digitalker-based unit tha
> On Feb 9, 2021, at 5:24 PM, Noel Chiappa via cctalk
> wrote:
> BTW, your neat hack to do that only works on the RK11-C, and not the RK11-D:
> the latter doesn't implement 'Read/Write-All'.
Yup -- this is one of the lesser-known advantages of the RK11-C over the later
controllers. Another b
Working on fixing a pair of TK70's here to speed up my backups. The TK50
is fine on a TQK70 controller (it streams perfectly) but I am coming
close to filling a tape.
I've managed to assemble a working TK70 out of two unhappy ones, but to
fix the other I need to replace the eject button switch
> From: Fritz Mueller
> In at least one case of attempting to recover a pac
BTW, your neat hack to do that only works on the RK11-C, and not the RK11-D:
the latter doesn't implement 'Read/Write-All'.
Noel
> the Unix V6 RK pack formatter ... sets _both_ 'Format' and
> 'Read/Write-All
Oooops; my bad; I mis-read the register description. It's setting 'Inhibit Bus
Address Increment' and 'Format', not 'Format' and 'Read/Write-All'. So ignore my
speculation about 'Read/Write-All' not getting the
On 01/02/2021 20:07, Fred Cisin via cctalk wrote:
A US pint of water weighs 1.043 pounds.
One "fluid ounce" (volume) of water weighs 1.043 ounces (weight)!
The nit-picker in me would say "you mean mass", except that there's an
even bigger nit to pick - the density of water is not constant but
> On Feb 9, 2021, at 9:27 AM, Noel Chiappa via cctalk
> wrote:
> ... the Unix V6 RK pack formatter ...
> sets _both_ 'Format' and 'Read/Write-All', and _doesn't_ set up the sector
> header words in the memory buffer, arguing that even with 'Read/Write-All' on,
> the hardware is still generating
Though i’m no expert, it looks like those are more an artefact of production,
rather than usable test points. It seems like those pins extend throughout the
ceramic substrate, and were most likely produced by pushing the pins through
holes in the substrate and then soldering them. This may have
> Fron: Jon Elson
> The write all function is likely how you format a blank pack.
No, 'Format' is a separate bit in the CSR from 'Read/Write-All', and they do
different things.
The RK11 always re-writes the header word of each sector when it writes a
sector in normal operation; when 'For
On 02/08/2021 11:37 PM, Ethan Dicks via cctalk wrote:
On Mon, Feb 8, 2021 at 10:22 PM Fritz Mueller via cctalk
wrote:
On nice thing about this controller is that it supports "Read/Write All" mode,
which
lets you read or write the raw bitstream including block headers. This can be
useful
for
> From: Ethan Dicks
> I do have a replica KM-11 set that I need to construct.
You'll need the RK11-C overlays (shown on pg 6-2 of the RK11-c Manual). (My set
of overlays from Guy with his KM11 replica included them; thanks Guy :-).
> From: Fritz Mueller
> The cables are actuall
In item https://www.ebay.com/itm/265045229011 I am curious as to whether the
gold islands on the top-side are functional test-points giving electrical
access to the underside pins? Was there a clip designed to attach to the
top-side of these chips for use in circuit analysis? Was this design uniq
I have two backplanes and a diablo drive if anyone is interested.
Paul
On Mon, Feb 8, 2021 at 11:38 PM Ethan Dicks via cctalk <
cctalk@classiccmp.org> wrote:
> On Mon, Feb 8, 2021 at 10:22 PM Fritz Mueller via cctalk
> wrote:
> > Yup, RK11-C, and it seems complete (modulo drive cables and
> ter
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