#garfield Logs
May 01 2021
#garfield Calendar
08:17 AM rue_mohr: cat was barfing this morning, I'm going back to bed
09:26 AM Tom_L: yard done, showertime
11:18 AM rue_mohr: oof, I didn't expect to sleep like that
11:41 AM Tom_L: maybe you needed it
12:01 PM rue_mohr: probably, almost no sleep all week
12:25 PM rue_mohr: so, thoughts on the chip shortage?
12:25 PM rue_mohr: over with the pandemic?
12:37 PM aandrew: no
12:37 PM aandrew: it'll take a while to get the factories back online. weren't there two foundry fires?
12:38 PM aandrew: I mean this stuff happens, remember the RAM shortage and the (I think?) HDD shortage before it?
12:41 PM rue_mohr: I remember the ram shortage, $100/M
12:47 PM Tom_L: back when a GB was unheard of?
12:54 PM aandrew: no, this was back when 4GB was common
12:54 PM aandrew: I *think* DDR2-era
12:55 PM rue_mohr: 1994, factory burned down, ram went to $100/M
12:55 PM aandrew: there was a shortage way more recent than '94
12:56 PM Tom_L: must not have been looking for any then
12:56 PM rue_mohr: I think my system is 2011
12:56 PM rue_mohr: so I dont think I noticed
12:56 PM Tom_L: rue_mohr, get your external thread coupler done?
12:56 PM rue_mohr: no, the material I found didn't play out
12:56 PM Tom_L: i gotta build a desktop soon, any recomendations for MB?
12:56 PM rue_mohr: I bought something to turn down this week at work
12:56 PM Tom_L: i've got 2 gigabyte
12:57 PM Tom_L: i may use one of those
12:57 PM rue_mohr: no idea, I think they are integrating bad gpu's into all cpu's now
12:57 PM Tom_L: but i bet she'll want a 4k screen
12:57 PM rue_mohr: that said, apparently you cant get a video card if you life depends on it
12:57 PM rue_mohr: thanks bitcoin miners
12:58 PM Tom_L: any ideas on a 1024 touch screen?
12:58 PM Tom_L: 1080i i meant
12:58 PM rue_mohr: no
12:58 PM rue_mohr: I'm still waiting for something better than the system I bought in 2011
12:59 PM Tom_L: so i got a compression RG-6 tool the other day for that cable and turns out the connectors are different among brands
12:59 PM rue_mohr: right now, If I spend $1000 I can get one more core than what I have, same speed
12:59 PM Tom_L: the ones i had were too short for it
12:59 PM rue_mohr: yep
12:59 PM rue_mohr: everyones making different ones
12:59 PM rue_mohr: did you get the cable thru?
12:59 PM Tom_L: would have been nice to know
12:59 PM Tom_L: yes
01:00 PM Tom_L: i got alot better pic with the new cable too
01:00 PM rue_mohr: is it a axial or radial crimp?
01:00 PM Tom_L: i'd been having trouble with it
01:00 PM Tom_L: axial
01:00 PM Tom_L: belden
01:00 PM Tom_L: i have both actually
01:00 PM rue_mohr: in a pinch I use a pair of piers and channel locks
01:00 PM Tom_L: i used a cheapo hex crimp for now
01:01 PM rue_mohr: the pliers to back the silly ring
01:01 PM rue_mohr: the channel locks to squeese it all
01:01 PM Tom_L: had a helluv a time getting the connector on
01:01 PM rue_mohr: use an old F-F coupler in it to protect the threads
01:01 PM Tom_L: it was probably for R 59?
01:01 PM rue_mohr: hmm
01:01 PM rue_mohr: was the ring on it... orange?
01:01 PM Tom_L: no
01:02 PM rue_mohr: I dont remmeber the other colour
01:02 PM rue_mohr: blue?
01:02 PM Tom_L: my kid won this crap at his machining competetion. the idiots gave him the wrong prize so now i got a bunch of cable tools
01:02 PM rue_mohr: !!
01:02 PM Tom_L: stupid bastards but oh well
01:02 PM rue_mohr: well post some pics!
01:03 PM rue_mohr: out of tea aagi
01:03 PM Tom_L: of what?
01:03 PM Tom_L: i'm gonna run get the right end here in a bit
01:03 PM rue_mohr: me and ma are going to go into the woods and do some plant hunting
01:03 PM Tom_L: cut it off and try again
01:03 PM Tom_L: weed?
01:03 PM Tom_L: :)
01:03 PM rue_mohr: for the plastic ones, the end colour denotes the cable type
01:03 PM rue_mohr: I think you want orange
01:04 PM rue_mohr: wild berry bushes
01:04 PM Tom_L: every time somebody comes to service it, they cut the ends off and change them all
01:04 PM Tom_L: wtf
01:04 PM rue_mohr: yea
01:04 PM rue_mohr: everyone keeps changing the standard
01:11 PM Tom_L: yeah well the cable keeps getting shorter too
01:11 PM rue_mohr: the only ones the local company will use now have metal rings
01:11 PM rue_mohr: "less rf leakage" <-- my ass
01:11 PM Tom_L: i just want one that fits this tool is all
01:11 PM rue_mohr: show me the tool!
01:11 PM rue_mohr: sun is calling, I need to find the pants
01:11 PM Tom_L: https://www.lowes.com/pd/Belden-Tools-VT-Compression-Tool/999997064
01:12 PM Tom_L: i'm gonna get those black plastic ends
01:12 PM rue_mohr: the all-metal ones are the only ones the local cable company uses
01:12 PM Tom_L: both tool and end are belden, they should work
01:13 PM aandrew: yep that's what I use too
01:13 PM Tom_L: yeah but i don't wanna buy a $80 tool either
01:13 PM rue_mohr: no, channel locks
01:13 PM Tom_L: well i got that tool already
01:13 PM aandrew: what about the twist on ones? total shit?
01:13 PM Tom_L: just lack the right ends
01:16 PM rue_mohr: ok, turns out
01:16 PM rue_mohr: yes the black ones
01:16 PM rue_mohr: blue are for BNC
01:16 PM Tom_L: do some ends need more stripped of the wire or are they all pretty much the same 1/4" 1/4" strip?
01:17 PM rue_mohr: all 1/4" - 1/4"
01:18 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190399.jpg
01:18 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190400.jpg
01:18 PM Tom_L: i need a good data guy to drive his truck down here and put a cable end on for me
01:18 PM rue_mohr: so, the red is the old RG6, the black is the new
01:18 PM rue_mohr: the orange is the RG59
01:18 PM rue_mohr: and I have no metal ones
01:19 PM Tom_L: i'll grab a handfull of the belden black plastic ones labelled for RG6 then
01:21 PM rue_mohr: so, In a pinch, I push it all togethor
01:21 PM rue_mohr: put an coupler in it
01:22 PM rue_mohr: use cheap pliers with that moon gap placed behind the compression ring
01:22 PM rue_mohr: and then squeeze from that to against the coupler to push it all togethor
01:22 PM Tom_L: yeah
01:22 PM rue_mohr: wrecks the coupler, but the connector gets squeezed on
01:22 PM Tom_L: with your teeth of course
01:23 PM rue_mohr: (if I have to )
01:23 PM rue_mohr: :)
02:04 PM Tom_L: ok these look better, guess we'll see for sure here soon
02:08 PM rue_mohr: UGH
02:09 PM rue_mohr: I'll buy _8_ more breadboards!
02:37 PM Tom_L: ok took about 3 tries but i got it
02:37 PM Tom_L: the stripper is different on those too aparently
02:37 PM Tom_L: needs more outter insul stripped
02:38 PM rue_shop1: hmm
02:38 PM rue_shop1: some of the cable types are a complete pain in the ass to strip
02:39 PM Tom_L: i had a somewhat universal stripper that i ended up using. not the standard 1/4 x 1/4 strip
02:51 PM rue_mohr: often, in a pinch, I just cut carefully with a utility knife
02:51 PM rue_mohr: the end one down to the center conductor first, then the outter sheath one
02:56 PM Tom_L: just getting the right lengths of bare wire/shield was a pita
02:57 PM rue_shop2: ?
02:57 PM Tom_L: not the standard 1/4 x 1/4 strip
02:58 PM Tom_L: unless i did it wrong
02:58 PM Tom_L: but it's on and not coming off so meh
03:21 PM rue_shop1: hmm
07:18 PM rue_mohr: yay!
07:18 PM rue_mohr: a bit of help from #avr and my clock generator code is working
07:18 PM rue_mohr: !
07:22 PM aandrew: nice
07:31 PM Tom_L: still someone in there with some brains?
07:31 PM rue_mohr: yup
07:32 PM rue_mohr: but that said, one of the errors was clear if you just read my comments and looked at my code
07:32 PM rue_mohr: rubber duck, right?
07:34 PM aandrew: only if you actually have a rubber duck you talk to
07:35 PM rue_mohr: iirc there is rubberduck.com or something
07:36 PM polprog: good job on that tiny85 clock gen :)
07:36 PM rue_mohr: heh thanks
07:36 PM rue_mohr: a dip8 is great
07:37 PM rue_mohr: that clears room for lots of things
07:37 PM polprog: meanwhile i found out the thin clients i have can run on 5-24V instead of 12
07:37 PM rue_mohr: ooo
07:37 PM rue_mohr: thats pretty wide
07:39 PM polprog: 35V if you replace the Vin bus caps
07:39 PM polprog: https://polprog.net/blog/winterm/
07:40 PM polprog: everything runs from buck converters, the 12V in is just used to power the bucks which power the rest of the system
07:40 PM polprog: thanks to Kiwa who found out that their S30 runs from a 5V power bank fine
07:40 PM polprog: and there I go curing insomnia
07:41 PM rue_mohr: I was quite excited to get the oscillator on that z80 working
07:42 PM rue_mohr: that was my first high freq osc
07:42 PM polprog: what freq?
07:42 PM polprog: i have to try Clapp with the NPNs and the 100M xtal
07:42 PM polprog: and maybe JFET then
07:42 PM rue_mohr: 4Mhz
07:42 PM polprog: JFET biasing is a bitch
07:42 PM polprog: nice
07:42 PM rue_mohr: uses 74ls04
07:43 PM rue_mohr: I think I have a wyse
07:43 PM polprog: i think ill grab a sanwich and go to bed :v
07:44 PM polprog: but sure. Im curious to check out which one. They can run linux pretty okay..
07:45 PM rue_mohr: if I switch over its a bit sad
07:45 PM polprog: switch over to what
07:45 PM rue_mohr: the current crystal osc is more stable
07:45 PM rue_mohr: then the t85
07:46 PM rue_mohr: and it was the one thing I was sure was definitly good and done
08:03 PM rue_shop1: so, the idea is that I change out the clock system, which adds a 9.21~Mhz uart clock for me
08:04 PM rue_shop1: then I add a 8254, which replaces a counter and adds a clock source for the tape uart and the comm uart
08:04 PM rue_shop1: Then, I add an 8251 comm uart
08:04 PM rue_shop1: which allows me to serial upload code
08:30 PM rue_mohr: its interesting seeing how many of the new devices I'm adding are pre-programmed
08:30 PM rue_mohr: the keyboard decoder rom, and the clock gen
08:38 PM rue_mohr: hmm, another issue is
08:38 PM rue_mohr: I have two 16k chips from adress 0000
08:39 PM rue_mohr: I want to make it one 32k chip
08:39 PM rue_mohr: (rom)
08:39 PM rue_mohr: eprom should be find, but eeprom would be much more fun
08:39 PM rue_mohr: but eeprom is made in 16k and 64k
08:39 PM rue_mohr: not 32
08:39 PM rue_mohr: I couldn't bear to wire off an address line to bring it down
08:40 PM rue_mohr: and 64k chips are a bit hard to do chip select for as the system stands
08:48 PM Tom_L: pre-programmed?
08:48 PM Tom_L: they are after all used.
08:52 PM rue_shop2: well, I mean like instead of discrete logic
10:03 PM rue_mohr: I think I want to be able to self-flash
10:18 PM Tom_L: there was an avr app note about that
10:21 PM rue_mohr: heh, I mean the z80
10:53 PM Tom_L: i know