>I built a remote debugger that fit in 256 bytes, and a
>user in France debugged his RTOS that controlled a hobby
>rocket to 25,000 feet. He now works with ESA, last I heard.
Who would need a debugger with assembler, those days programs worked
at the first time
Reply by ●April 16, 20182018-04-16
>Ah happy days, the purple flash from a windowed 8749 when you blew it
up...
Heart-warming, to be sure. Of course anyone nostalgic for the days of burn-and-crash development(*) can always use Arduino. ;)
Cheers
Phil Hobbs
(*) for any youngsters lurking, the pun refers to burning (programming) an EPROM and then watching your program crash, fixing the bug, and iterating till it stopped crashing.
Reply by ●April 16, 20182018-04-16
On Monday, 16 April 2018 11:48:10 UTC+1, Clifford Heath wrote:
...
> was, being mainly a software guy, I'd get the hardware
> working, make a start on the software, and get bored
> with the erase-program-test cycle before finishing
> projects.
I had an eprom emulator that plugged into the "piggy back"
eprom socket of a 63P01 which greatly speeded up that process.
As the one-time-programmable devices were much cheaper than the
windowed ones I tried X-ray erasure (at 30keV). Unfortunately,
although this worked, the storage cells became permanently
leaky.
John
Reply by Clifford Heath●April 16, 20182018-04-16
On 16/04/18 19:28, jrwalliker@gmail.com wrote:
> On Monday, 16 April 2018 00:30:11 UTC+1, Clifford Heath wrote:
>> I once accidentally ran a 5V quartz-windowed MC68HC11
> That was a nice processor - along with the Hitachi clones like the 63701.
Indeed. If it had flash and hardware breakpoint support
I could have been much more ambitious with it. As it
was, being mainly a software guy, I'd get the hardware
working, make a start on the software, and get bored
with the erase-program-test cycle before finishing
projects.
I built a remote debugger that fit in 256 bytes, and a
user in France debugged his RTOS that controlled a hobby
rocket to 25,000 feet. He now works with ESA, last I heard.
> "Clifford Heath" <no.spam@please.net> wrote in message
> news:2gRAC.26085$8Y2.22515@fx28.iad...
>> I once accidentally ran a 5V quartz-windowed MC68HC11
>> on 9V, and it worked... except for the ADC that was
>> damaged. Back on 5V, the current consumption was
>> slightly raised, but everything else still worked ok.
>> The ADC was still dead.
>
> Heh, surprised it didn't glow yellow-green. Or maybe it did, but it
> was too dim to see.
Ah happy days, the purple flash from a windowed 8749 when you blew it
up...
--
John Devereux
Reply by Reinhardt Behm●April 16, 20182018-04-16
AT Monday 16 April 2018 17:28, jrwalliker@gmail.com wrote:
> On Monday, 16 April 2018 00:30:11 UTC+1, Clifford Heath wrote:
>
>> I once accidentally ran a 5V quartz-windowed MC68HC11
>
> That was a nice processor - along with the Hitachi clones like the 63701.
Which unfortunately were killed because of the dispute between Hitachi and
Motorola. I had the whole 63701 family in use.
--
Reinhardt
Reply by ●April 16, 20182018-04-16
On Monday, 16 April 2018 00:30:11 UTC+1, Clifford Heath wrote:
> I once accidentally ran a 5V quartz-windowed MC68HC11
That was a nice processor - along with the Hitachi clones like the 63701.
John
Reply by Tim Williams●April 15, 20182018-04-15
"Clifford Heath" <no.spam@please.net> wrote in message
news:2gRAC.26085$8Y2.22515@fx28.iad...
> I once accidentally ran a 5V quartz-windowed MC68HC11
> on 9V, and it worked... except for the ADC that was
> damaged. Back on 5V, the current consumption was
> slightly raised, but everything else still worked ok.
> The ADC was still dead.
Heh, surprised it didn't glow yellow-green. Or maybe it did, but it was too
dim to see.
Tim
--
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Contract Design
Website: https://www.seventransistorlabs.com/
Reply by Clifford Heath●April 15, 20182018-04-15
On 13/04/18 17:36, Tim Williams wrote:
> <jrwalliker@gmail.com> wrote in message
> news:1cd22915-9697-44aa-921f-c66b8e104baf@googlegroups.com...
>> On Thursday, 12 April 2018 22:42:33 UTC+1, Tim Williams� wrote:
>>
>>> Doesn't matter much for today's logic, what with TVS diodes being
>>> useless
>>> under 5V.� I suppose they would've worked just fine back in the day,
>>> a "5V"
>>> TVS protecting TTL or HC CMOS (or a 12V TVS protecting CD4000, but
>>> probably
>>> not a 15 or 18V TVS!).
>>>
>> I once tested a 5V logic device with higher power supply voltages.� It
>> lasted only a few minutes at 6.5V.� I can't remember exactly what it was,
>> or even why I was doing it, but it was most likely a GAL programmable
>> logic device.
>> John
>
> Once had a 3.3V PIC overvolted by a mis-spec'd LDO, it was simmering
> about 3.8-4.2V and 100-200mA.� Not a bad LV zener, I suppose.
I once accidentally ran a 5V quartz-windowed MC68HC11
on 9V, and it worked... except for the ADC that was
damaged. Back on 5V, the current consumption was
slightly raised, but everything else still worked ok.
The ADC was still dead.
Reply by ●April 14, 20182018-04-14
On Sat, 14 Apr 2018 18:09:57 -0700, John Larkin
<jjlarkin@highlandtechnology.com> wrote:
>On Sat, 14 Apr 2018 19:36:27 -0400, krw@notreal.com wrote:
>
>>On Sat, 14 Apr 2018 07:29:41 -0700 (PDT), tabbypurr@gmail.com wrote:
>>
>>>On Saturday, 14 April 2018 14:56:23 UTC+1, k...@notreal.com wrote:
>>>> On Sat, 14 Apr 2018 05:17:42 -0700 (PDT), tabbypurr wrote:
>>>
>>>> >It totally reminds me of my time in bigcorp. Incompetents making key decisions, no-one noticing there was any kind of problem. And anyone that noticed and said anything got the blame for anything they can think up. No surprise that the mortality rate of big successful businesses is so high.
>>>>
>>>> I think the major reason for the death of big corporations is the
>>>> *lack* of decision making. It really is hard to kill a cash cow, but
>>>> someone will. That's why big corporations love government
>>>> intervention. It keeps upstarts from going around killing cows.
>>>
>>>FWIW my experience has been that the accumulation of stupid decisions is often what kills the thing. And if it doesn't, time usually does. Products move on, what was great years ago isn't any more.
>>
>>I rode IBM down for 30+ years. They actively tried to kill
>>microprocessors, to the (silly) point of just speaking the word a
>>career limiting move. And Intel came along and killed their cow. They
>>didn't _allow_ themselves to kill it.
>
>
>That's a common pattern. A company won't kill their own cash cow, so
>they let someone else do it.
That's exactly my point. IBM could have bought (almost did) Intel but
they would have just buried it in the back yard of Armonk.