asciilifeform: apeloyee: could potentially build out of discretes.
asciilifeform: apeloyee: i've thought about 'what is minimal circuit for rsa'. i.e. ideally would eat x,y,m , of b bitness, and shit forth x^y mod m after ~b^3 clock cycles.
asciilifeform: apeloyee: karatsubaization doesn't need one either
asciilifeform: mircea_popescu: do you know how many tracks in typical pc mobo ?
asciilifeform: (i.e. you don't need a universal shift register, can make 'constant' value using a just-in-time-cooked bitstream loaded in for that particular occasion)
asciilifeform: possibly even use it perversely to perform certain computations quickly.☟︎
asciilifeform: but in principle apeloyee is right, one could make a 'page swapped' tile of 'ice's.☟︎
asciilifeform: it does take nearly whole second tho, to load
asciilifeform: ( if it existed -- yes, you could 'page it in' )
asciilifeform: apeloyee: afaik nobody ever sold a 'sea of gates' fpga/cpld with sram bitstream storage.
asciilifeform: apeloyee: they have very slow-writing storage for the bitstream (nand flash, with ~10k cycle endurance) so definitely not practical
asciilifeform: apeloyee: adder is just a series of xor's. but yes you need shift registers to hold the operands, and one to hold the result ( which then can be shifted )
asciilifeform: i still dislike having to use toolchain from hitler to compile the bitstream. and thereby the current fg is the last time i use a xilinx in a product.
asciilifeform: and thereby has no attack surface in the traditional sense
asciilifeform: it is also unusual in that it accepts no input from the computer
asciilifeform: there are not many items, even conceptually, that can be audited this way
asciilifeform: apeloyee: fg is a very unusual device, in that you can actually put, e.g., terabyte of known input into it, and only you know what the half-GB that ought to come out, is, there is not physically room inside for a secret crib sheet of that size☟︎☟︎
asciilifeform: and it's the 1 fpga currently sold that's worth copying ( scaled-up, naturally )
asciilifeform: even if you need three dozen of'em to fit , e.g., vga controller.
asciilifeform: it's the 1 product currently sold, that's worth buying.
asciilifeform: the only cure for this is to fab own fpga.
asciilifeform: apeloyee: the most immediate risk is that 'ice' series simply goes out of print. like anything else.
asciilifeform: apeloyee: they could in principle try intel-style fascism with built-in rsa sig verifier or the like. but afaik the only vendor to date to attempt any such thing, was xilinx, and it wasn't even in earnest
asciilifeform: apeloyee: nothing per se. but the 'fiddled' chip is likely to be reversable with same methods, on account of being homogeneous
asciilifeform: it is sorta how like american hardware store would love to sell plastic pipe wrenches. but you can't actually work with those, so they don't.
asciilifeform: they would have long ago phased out the sane (sea of gates) devices , otherwise.
asciilifeform: so yes, the only reason why anybody sells ice and 95xx -like 'sea of gates' at all, is that for 'glue' (simple boolean functions of signals, for e.g. bus decoding, addressing, simple i/o multiplexing) is that you can't actually do it reliably with the non-seaofgates devices☟︎
asciilifeform: the smaller ones are 'sea of gates' as they are intended to be used for glue logic, and emphasize predictable path timing ( the analogous xilinx series is the 95xx , as used in FUCKGOATS )
asciilifeform: apeloyee: the larger chips by lattice co are already xilinx-like
asciilifeform: http://btcbase.org/log/2018-01-11#1769036 << this is correct, it simply doesn't have enough LUTs to store even the 2 operands, not even speaking of result. however xilinx is a dead end : because it is 1) nonhomogeneous 2) they switch the internals regularly, specifically to prevent a reversing from being useful in the long term. see old xilinx threads in the logs for detail☝︎
asciilifeform: BingoBoingo: boots that can take ~removable~ (check into baggage when going by airplane) iron plates would be spiffy imho☟︎
asciilifeform: they dunbelieve in sidewalks there ( repurposed as orcish parkinglot , as in many post-su lands ) and after coupla days of walking on rubble in 'civilized' shoes , feet resemble chinese bamboo punishment victim's☟︎
asciilifeform: these would've been ideal for the 100km of bucharest walk
asciilifeform sometimes sees photos of africans, straw ebola huts in background, wearing 'nike', tshirts, etc. and wonders if typical ameritard viewer sees 'ooh hey they get Real Clothing, Like Us' rather than 'hmm why am i dressed like ebola african'☟︎
asciilifeform: for coupla hundy you could prolly get a tailored set . ( asciilifeform did not stay longenuff to investigate )☟︎
asciilifeform: in timisoara, 'boot valhalla', walk into ~any shop and for 1.5x of what 1 pair of typical chinese liquishit costs in shitland, you get italian boots , with actual leather, insulation , proper sole, etc
asciilifeform: prolly banned, like decent milk ( see 'uht' thread )
asciilifeform: BingoBoingo: i suspect that decent shoes are somehow illegal in usa. they are ~entirely unavailable in any shop i've ever walked into there.☟︎
asciilifeform: phf: i even suspect that it is possible to improve the cornall design with... randomized scan. i suspect that the sequential scan, sets up resonances.☟︎
asciilifeform: ( the ones that used soldered wires instead of pcb -- still matrix. )
asciilifeform: at least every single one i've ever seen a photo of the inside of.
asciilifeform: even after painting the inside of the plastic top of mine with conductive pait, i still occasionally got this headache. now seems to be gone. ( cable was antenna... )
asciilifeform: here's an interesting find for phf : turns out that snap-on-cable rf chokes do wonder for 'model f' kbd 'ghost keystroke' problem
