What do you thing about this joke? - Page 1
Forum section: electronics / general

author: txescientist
author_rank: Regular Contributor
timestamp: April 29, 2016, 09:04:59 pm
content: I made up this joke, please tell me how good or bad is it?-What does microprocessor say when there's no EPROM around?-nop nop nop

author: MK14
author_rank: Super Contributor
timestamp: April 29, 2016, 09:21:43 pm
content: Quote from: txescientist on April 29, 2016, 09:04:59 pmDo I find it funny ?NOP NOP NOPPlease ERASE the joke, in the UV EPROM eraser.Why did the EPROM cross the road ?To avoid your jokes.One day, txescientist in a FLASH of inspiration made a joke. Fortunately the FLASHES erase function allowed us to delete it, permenantly.In future, please encrypt all future jokes (so no one can read them, even accidentally), and then send them to eraseWITHOUTreading@nowhere.nop.nop.nop

author: Melt-O-Tronic
author_rank: Frequent Contributor
timestamp: April 29, 2016, 09:24:37 pm
content: In before the thread devolves (even more) into discussions of floating inputs and nondeterministic blah blah blah.

author: tom66
author_rank: Super Contributor
timestamp: April 29, 2016, 10:42:19 pm
content: What did the x86 processor say when the flash memory is empty?PUSH, PUSH, PUSH...Stack overflow.

author: ade
author_rank: Unknown
timestamp: April 29, 2016, 10:59:54 pm
content: You want bad jokes??- Why did the CIA ban Chinese microcontrollers?- They were full of SPIes- Why do felines make great electricians?- They're rated CAT IX- After some back and forth, Armstrong was arrested today- He got caught red-handed as a joule thiefI'll be here all night...

author: Tomorokoshi
author_rank: Super Contributor
timestamp: April 29, 2016, 11:35:43 pm
content: Quote from: Melt-O-Tronic on April 29, 2016, 09:24:37 pm

author: XOIIO
author_rank: Super Contributor
timestamp: April 30, 2016, 02:36:41 am
content: I always have trouble looking for laptop ram, desktop ram is pretty easy to find, but laptop ram is just impossible. No matter how many lights I have turned on. it's always so dimm

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 30, 2016, 02:43:41 am
content: The very first circuit I built with a Z80 CPU was an overly elaborate 16 bit counter. Wire the data bus low and it reads NOP (00h), and never writes to the bus (so it can be hard low, don't even need pulldowns). A15 then buzzes at a modest frequency (something like 20Hz, for a 4MHz CPU clock and, however many T-states a NOP was, 3 cycles I think?).Tim

author: AntiProtonBoy
author_rank: Frequent Contributor
timestamp: April 30, 2016, 04:51:55 am
content: My CringeMeter 2000 on this subject:

author: XOIIO
author_rank: Super Contributor
timestamp: April 30, 2016, 05:09:49 am
content: Quote from: AntiProtonBoy on April 30, 2016, 04:51:55 amConsider it your... punishment.

author: Ian.M
author_rank: Super Contributor
timestamp: April 30, 2016, 05:29:27 am
content: Q: Why must you always wait for a long time before putting equipment back into service after cleaning contacts, circuit boards etc. with alcohol?A: It needs to sober up, because: A potched Watt never toils!

author: ade
author_rank: Unknown
timestamp: April 30, 2016, 06:25:22 am
content: Quote from: AntiProtonBoy on April 30, 2016, 04:51:55 amKnock, knock...Who's there?Meter.Meter who?Meter near the lamp, she'll tell you the amp!

author: Skimask
author_rank: Super Contributor
timestamp: April 30, 2016, 07:03:02 am
content: A volt, an amp, and an ohm walk into a bar...(that's all I got...)

author: ade
author_rank: Unknown
timestamp: April 30, 2016, 07:28:30 am
content: QuoteIt's got potential... you should charge ahead... the result might be, electrifying!

author: txescientist
author_rank: Regular Contributor
timestamp: April 30, 2016, 07:30:49 am
content: PCB Layout Engineer: One of the few professions from which you can be fired for missing the bus.Q: Why do transistors tend to live longer than resistors?A: Most likely it is due to their active lifestyles.

author: Halcyon
author_rank: Unknown
timestamp: April 30, 2016, 10:24:05 am
content: Where is Dave's 'no' button when you need it?

author: Zbig
author_rank: Frequent Contributor
timestamp: April 30, 2016, 10:28:08 am
content: Why did the Xilinx race team up with Alterans to attack planet Xeon and failed?Their Intel said they were unARMed but turned out they had Atom.

author: MK14
author_rank: Super Contributor
timestamp: April 30, 2016, 10:47:54 am
content: Quote from: AntiProtonBoy on April 30, 2016, 04:51:55 amYes but is your CringeMeter working correctly, or is it just a FLUKE ?Quote from: T3sl4co1l on April 30, 2016, 02:43:41 amOne or more, very old microprocessor sets, used that very principle, to allow hex or switched data, to be entered. I.e. it made the microprocessor issue successively increasing addresses, ready for ram to be filled, by the user.

author: txescientist
author_rank: Regular Contributor
timestamp: April 30, 2016, 11:18:11 am
content: This topic is so negative, that overflowed to pure awsome

author: rrinker
author_rank: Super Contributor
timestamp: April 30, 2016, 05:12:20 pm
content: Quote from: MK14 on April 30, 2016, 10:47:54 amThat would be the RCA 1802, with its built-in Load mode, no additional hardware (other than some switch or keyboard design) needed to load programs. You can also hard wire the pins on it and make an LED flasher that draws significantly less current than an LM3909 flasher.

author: MK14
author_rank: Super Contributor
timestamp: April 30, 2016, 05:44:39 pm
content: Quote from: rrinker on April 30, 2016, 05:12:20 pmThe one I was thinking of was the SCAMP (based on the SC/MP, with slide switches and LED's, on a big PCB). But I can well believe there are many others.I've done it myself by accident (the read/write/enable lines or something were messed up), so it read "NOP's" all the time, until I fixed it. (Actually it was probably whichever instruction is produced by all $00's or all $FF's, being read. Which is sometimes a NOP. Depending on the MCU's instruction set).

author: rrinker
author_rank: Super Contributor
timestamp: May 01, 2016, 03:38:18 am
content: That may have been about all 2 of them then. I'm sure you can rig equivalent circuitry on others, but the 8080, 8085, Z80, and 6502 definitely did not have built in load mode. Only problem with the 1802, you can; just tie all data lines high or low - 00h is IDL and FFh is SMI (subtract memory immediate). NOP on the 1802 is C4h. 1802 was static CMOS process, so you could clock it right down to 0 and it would draw nanowatts until you started the clock back up again and pick up where it left off. It was also available in radiation hardened versions and saw duty in several OSCAR satellites as well as some space probes like Galileo. If you recall way back when they did a mission to swap out the computer on the Hubble telescope - I think the one they took out was a system built around the 1802.I have a soft spot for the 1802 - it was my first computer, which I still have and it still works. But even earlier than that, it was an article on the predecessor chip, the 1802 (essentially the same but the ALU and registers were in two separate DIP packages instead of a single 40 pin DIP), in a 1974 Radio-Electronics or Elementary Electronics that pushed me towards the digital side of electronics. The article explained the details of the CPU's operation and though I was but 9 or so at the time, I read and reread that article until I understood it.

author: tszaboo
author_rank: Super Contributor
timestamp: May 01, 2016, 11:45:07 am
content: This thread is out of control. Better get my PID.

author: MK14
author_rank: Super Contributor
timestamp: May 01, 2016, 07:26:24 pm
content: Quote from: rrinker on May 01, 2016, 03:38:18 amI'm also very interested in the 1802. I also have a soft spot for it, despite the fact I have never been involved with it, so far.I still really admire computers made/programmed with just switches and Leds (+ possibly hex keyboards and seven segment displays). They seem to mark the start of the (especially home/hobbyist) microprocessor revolution.They were typical (but very rare) electronics magazine projects of the 1970's, using various different microprocessors of the time.The super low power consumption, is still an amazing concept. Somehow modern devices (because of increasing leakage currents, as they get smaller, I have been led to believe), are NOT necessarily so good, as the older CMOS parts. But there do seem to be possible exceptions. So if they (IC producers) go for that (low power consumption), they can still do it.E.g. Devices which need to run for 10+ years on a small lithium battery, and yet still have a degree of computing processing ability available. Such as smart power meters (maybe).

author: txescientist
author_rank: Regular Contributor
timestamp: May 01, 2016, 07:46:42 pm
content: CDP1802 was used in Yugoslavian radiation detector, because it is very reliable under high ionizing radiation. Also, read it somewhere that 4 of them were used in a satellite. Also, it was used in Yugoslavian home computer PECOM 32 and 64.