#garfield Logs

Sep 15 2020

12:31 AM polprog: aandrew: what isa cards? ofc im interested
12:37 AM polprog: aandrew: ah, i see them. Yeah, sure. i can take them
12:37 AM polprog: rue_mohr: what snappy teardown?
12:37 AM rue_mohr: tubetimeus did a reverse engineer or a snappy
12:37 AM rue_mohr: what I saw was all the hardware for a digital scope
02:56 AM polprog: ah, that video capture thingy
09:26 AM rue_mohr: polprog, so, its not a parallel port ethernet... its serial!?
09:29 AM polprog: yeah haha
09:29 AM polprog: its even better..
09:29 AM polprog: i suspect theres an entire ISA system in there
09:34 AM rue_mohr: the BSI much must(?) be a microcontroller
09:35 AM rue_mohr: the BSI chip must(?) be a microcontroller
09:35 AM rue_mohr: but it looks like ram ... ?
09:36 AM rue_mohr: ah no, ok
09:36 AM rue_mohr: the 80188
09:37 AM rue_mohr: yea ok
09:37 AM rue_mohr: so its a 80188 with 2M of ram, ethernet, and serial interface
09:37 AM rue_mohr: wow
10:24 AM aandrew: oh wow this is nice: https://back7.co/home/the-raspberry-pi-quick-kit
10:25 AM aandrew: rue_mohr: honestly I think you'd be far better served with a $3 FX2LP board and any parallel ADC you can get your hands on
10:26 AM aandrew: FX2LP is easily (?!) programmed with sdcc and gets you 480Mbps with lots of example code for any OS (and on the chip itself)
10:27 AM aandrew: I'm a huge proponent of azonenberg's line of thought though that everything should be ethernet connected. it's simpler, faster and far more reliable than USB
10:46 AM polprog: 2M?
10:46 AM polprog: i thought it was 256K
10:46 AM polprog: 2* 128kx8
10:46 AM polprog: ha, i knew you would get that snappy for parts :)
01:01 PM polprog: http://home.sandiego.edu/~ekim/e194rfs01/lec24ek.pdf
01:01 PM polprog: p14, p15, p16 etc
01:01 PM polprog: what is RFC?
01:01 PM polprog: radio frequency choke?
03:20 PM Tom_L: nest your parts for efficiency.
03:20 PM Tom_L: https://imgur.com/ap5F4LS
06:33 PM rue_mohr: aandrew, indeed, but if you go too high the signal handling goes crazy
06:34 PM rue_mohr: polprog, yes, RFC
06:35 PM rue_mohr: polprog, heh, did I get you addicted to oscillators?
07:43 PM aandrew: rue_mohr: "go too high" ?
07:44 PM rue_mohr: frequency
07:45 PM rue_mohr: the adc in that video thing sounds good, but I realized after I got it, that internally the adc might be AC coupled
07:45 PM rue_mohr: tubetime made a comment about it
07:45 PM rue_mohr: but I thought at the time he was just reffering to the front end
07:46 PM rue_mohr: which I'd switch out anyhow
08:56 PM aandrew: well 480Mbps and 8 bits gets you about 30MHz realtime best-world conditions
08:56 PM aandrew: that's not too h igh
08:58 PM aandrew: there we go, soldered on a new u.fl connector and got my network back
08:58 PM aandrew: this little orangepi lite2 isn't bad
08:59 PM aandrew: H6 is a decent processor, too bad it just doesn't have more RAM
09:03 PM aandrew: I picked up a 4GB rockpro64 though for more serious work, it's got pciex4 which will be fun
09:05 PM aandrew: $80 for a 64-bit quad core A53 and dual core A72 with Mali T860 GPU with 4GB RAM
09:07 PM aandrew: the GPU's got OpenGL/ES 1.2/2.0/3.0 and OpenCL 1.2, which means it should be somewhat useful for machine learning/media encode/decode etc
09:09 PM aandrew: don't get it off ebay though, it's cheaper off the vendor site
09:21 PM aandrew: huh, one of the H6 boards has PCIe too but H6 PCIe is fundamentally broken on the silicon
11:08 PM rue_shop1: erm
11:08 PM rue_shop1: I'm not trying to compete with the tek
11:14 PM aandrew: right, which is why I found your comment about speed confusiong
11:15 PM rue_mohr: sample speed = freq?
11:15 PM rue_mohr: the buffer mechanism in the system has me most interested
11:16 PM rue_mohr: I think the fastest usable ADC I have is 1Msps
11:16 PM rue_mohr: but if there is something to buffer the samples thats awesome
11:16 PM rue_mohr: I'm also interested in the fpga aspect of it
11:17 PM rue_mohr: I wonder if I can do cast ends for projects
11:17 PM rue_mohr: wait, why dont I just 3d print them
11:17 PM rue_mohr: damnit