clifford changed the topic of #yosys to: Yosys Open SYnthesis Suite: http://www.clifford.at/yosys/ -- Channel Logs: https://irclog.whitequark.org/yosys
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<GenTooMan> you can do so with 74180 and 74181 eons ago someone made a 16 bit CPU with those as part of the ALU.
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<ZirconiumX> GenTooMan: the 181 and 182 are obsolete parts
<tnt> SN74ACT8832 :)
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<tnt> (also obsolete, but damn, that was one hell of a 7400 series chip)
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<ZirconiumX> >ACT
<ZirconiumX> Holy crap that *is* one hell of a chip
<ZirconiumX> tnt: I've never even heard of that chip; TIL
<tnt> I didn't either until I looked at what 74 series chips had ALU in them.
<tnt> you can still buy it for like 250$ :p
<dys> ceramic-cased ones are twice that :-)
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<dys> IIRC there's a homebrew-cpu guy out there that built an 32-bit ALU with them in a 32-bit risc design called t-rex
<dys> his motivation for going discrete logic was his disgust with the proprietary fpga toolchains
<dys> <3 yosys
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<GenTooMan> ZirconiumX I had no idea they were talking using real chips. :D I believe the 281 is not obsolete but I could be wrong.
<ZirconiumX> Uh
<ZirconiumX> Do you mean the 283?
<GenTooMan> ZirconiumX 1 probably (LOL) and 2 apparently the military version of the 181 is still available (shocking) 3 SN74ACT8832 is likely from TI's GPU days in the 90s.
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<tnt> Wow, it's amazing that adding a (* keep="true" *) wire, that is _not_ used anywhere actually changes the synthesis result quite a bit.
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