Doug
You have the essence of what it can do and how it might do it, an old iron
PDP-11 / LSI-11 can't organically do the signal processing necessary to go from
a compact signal representation to audio. That said you could use a one bit
output, which would for efficiency require a serialiser, t
Wow! Actual engineers responding...
It looks like I could only do the most rudimentary audio.
1. Sample Rate: You got maybe 20K samples to store in lower memory. At
7KHz sample rate that would allow 3 seconds of audio. Voice only.
2. Samples: They must be 12 bits. Converting a modern audio cl
On 7/9/23 7:21 PM, John Herron wrote:
It can be a buzz kill if you visit about:logins on Firefox.
Yes, that can be a bit of a surprise to someone not in the know.
But if you stop and think about it for a few minutes, any and all
password managers absolutely MUST have access to the unencrypted
On Sun, Jul 9, 2023, 7:07 PM Grant Taylor via cctalk
wrote:
>
> PSA: Not all password managers are created equally.
>
It can be a buzz kill if you visit about:logins on Firefox.
>
On 7/9/23 3:12 PM, Chuck Guzis wrote:
It helps if you're running a version of *nixand not fenestrae.
Not as much as one would hope.
Android (Linux) and iOS (BSD derivative thus probably has a better clain
to Unix) have had 1-click or the dreaded 0-click vulnerabilities (bugs)
repeatedly
On 7/8/23 4:27 AM, dave.g4...@gmail.com wrote:
... sorry sent this to soon...
Things happen.
Despite what your browser says, the link itself isn't dangerous. Web browsers
aren't dangerous. Its USERS that are dangerous.
All the single, or worse zero click, attack vectors tend to imply that
Hello sir,
I used to get your newsletter but no longer...I understand there are
problems...
I would be most interested in getting your newsletter again.
Many thanks,
Murray 🙂
> It helps if you're running a version of *nixand not fenestrae.
Helps, but is not the near cure-all it was at one point, especially for the
larger/more popular distros!
Thanks,
Jonathan
On 7/9/23 12:51, Todd Pisek via cctalk wrote:
> Be aware that clicking on a malicious url can result on malware or spyware
> being installed on your machine without any further action on your part. All
> browsers have vulnerabilities. The most famous of these was the older version
> of Pegasus b
You just did use it to play "audio" :<)
The 6 us settling time corresponds to a sampling rate of ~167 kHz, not that you
will ever get there or would wish to.
The theoretical (real) sampling rate required for a given bandwith is Fs = 2
Bw. That requires brick wall filters and it is a lot of wor
Be aware that clicking on a malicious url can result on malware or spyware
being installed on your machine without any further action on your part. All
browsers have vulnerabilities. The most famous of these was the older version
of Pegasus by NSO back in the 2014-2016 timeframe. These so called
Thanks for confirming that HLDA doesn't need to be asserted at this stage.
I looked at the address trace and matched it to the disassembled ROM. My ROM
image compares to another ROM image that has been posted online at 9track.net,
so I am fairly confident that the CPU and ROM are OK.
I don't th
On 7/9/23 13:46, Douglas Taylor via cctalk wrote:
I have a PDP-11/53 and have just started playing with an
AAV11-C D/A board. It is a 4 channel D/A convertor with
12 bit resolution.
Can it be used to play an audio bit stream?
Here is simple code used to see if the thing was actually
working
> On 07/09/2023 1:46 PM CDT Douglas Taylor via cctalk
> wrote:
>
>
> I was surprised to see that it took ~34 ms to run through all the
> numbers from 0-, that is about 34 Hz. The manual says the 'settling
> time' is 6 microseconds. Is this fast enough for audio?
>
> How would you conve
I have a PDP-11/53 and have just started playing with an AAV11-C D/A
board. It is a 4 channel D/A convertor with 12 bit resolution.
Can it be used to play an audio bit stream?
Here is simple code used to see if the thing was actually working:
.title AAV11 D/A test
;
.asect
db
HLDA should be deasserted, that puts the processor in a DMA mode where it
releases all the control signals.
I/O W is asserted low when OUT is high and the low WR pulse comes along. It's
both status and timing, coming out of the 8228.
You would probably do well seeing if MEMR and MEMW are assert
Actually I have just found a more detailed description in the Intel 8080
Microcomputer Systems Users Manual 1975, but it still doesn't tell me
exactly how it works. It isn't completely clear to me if it needs HLDA to be
asserted for I/O W to be asserted.
> -Original Message-
> From: Rob Ja
Hello,
I have a non-functioning VT100. I think I may have isolated the problem to
an Intel 8228 chip (or 88228, the schematic says 8228, the part is marked
88228C). Certainly, the part gets a bit hot and it doesn't seem to be
outputting anything on the I/O W pin (pin 27) despite activity on STS
There are numerous Ham Radio groups at Groups.io: https://groups.io
If you know what you are after, search for it. If you're not sure,
search for "ham radio".
I belong to about 44 ham radio groups there.
73,
Dave
K7DCJ
On 7/6/23 9:30 AM, Bill Gunshannon via cctalk wrote:
I know this is
Threes this discord server where there is a nice ham community but most of the
groups I’ve found are on Facebook.
It’s fun to combine both hobbies like I’ve been computer controlling one of my
old rigs with a apple 2 and using a C64 in conjunction as a rtty terminal. So
many people take joy fr
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