#robotics Logs

Apr 28 2022

12:07 AM rue_mohr: flyback, one bit computer
01:44 AM josuah: flyback: there is a 32-bit RISC-V core that has a 1-bit ALU sort-of: https://github.com/olofk/serv
01:45 AM josuah: rue_mohr: ^ that was for you
01:46 AM josuah: rue_mohr: it performs all operations 32-bits, but one bit at a time (additions adds carries onto a temporary register instead of transferring it onto the next adder)
01:48 AM josuah: also... https://en.wikipedia.org/wiki/4-bit_computing
06:13 AM flyback: neat 1 bit mcu
06:19 AM flyback: I wouldn't mind making a 1 bit or 4 bit mcu if I had the skill
06:19 AM flyback: just for simple tasks
06:19 AM flyback: rue_mohr, CANUCK
06:19 AM flyback: did you see usagielectric
06:19 AM flyback: he did a 555 timer in tubes
06:20 AM flyback: he also took the motorola mc145something 1 bit mcu and did it in tubes
06:20 AM flyback: and added a alu which the origional chip does not have
06:20 AM flyback: he must have spend $1000 or more in tubes, geez
06:22 AM flyback: https://www.youtube.com/watch?v=y149hLe1zYo&list=PLnw98JPyObn0v-98gRV9PfzAQONTKxql3
06:22 AM flyback: USAGI ELECTRIC OWNS YOUR "CANUCK"
06:22 AM * flyback DROPKICKS RUE*.*
06:23 AM flyback: https://www.youtube.com/watch?v=oPA8dHtf_6M&list=PLnw98JPyObn1GUapiXLlGm8RrpQF-J_c1
06:23 AM flyback: ALSO
06:23 AM flyback: that was a neat chip motorola came up with
06:25 AM flyback: im sure they sold a CANUCKload of them
06:29 AM flyback: https://en.wikipedia.org/wiki/Integrated_injection_logic
06:29 AM flyback: insteresting
09:23 AM rue_mohr: flyback, to make a 1 bit, you need
09:24 AM rue_mohr: a program rom, 16k+
09:24 AM rue_mohr: two 74574
09:25 AM rue_mohr: a 74151, and 74259
09:25 AM rue_mohr: https://github.com/ruenahcmohr/OneBit/blob/main/schematic.jpg
09:25 AM rue_mohr: and thats the repo with a ASSEMBLER for it
03:59 PM flyback: yeah I considered something simple like a rom sequencer etc
03:59 PM flyback: very simple cpu
03:59 PM flyback: have you seen norbit
03:59 PM flyback: err mynor
04:00 PM flyback: https://www.hackster.io/news/mynor-is-a-single-board-computer-built-with-a-cpu-using-a-single-nor-gate-4005e16f01c6
04:00 PM flyback: slower than shit
04:00 PM flyback: but so damn simple and cheap
04:01 PM flyback: anyways nap time
04:13 PM mrdata: the european robotic arm for the space station is really neat
04:15 PM mrdata: it has identical end effectors on opposite ends, used to grapple objects or to three different grapple points on the nauka module
04:15 PM mrdata: so it can walk around from one to the next
04:15 PM mrdata: or hypothetically even let go entirely (but i guess wouldnt be powered if it did)
04:16 PM mrdata: it is being deployed in today's space walk
05:31 PM flyback: crazy to think they were doing whole databases in a few KB Of ram
05:31 PM flyback: on early ibm mainframes etc
06:52 PM flyback: https://www.verical.com/datasheet/asix-electronics-corporation-pci-bridge-chip-mcs9845cv-ba-4373642.pdf <--- pci-e to isa somewhat
07:51 PM orlock: same fuckers moved here from freenode i see
07:51 PM orlock: LTNS all
08:06 PM mrdata: orlock, yes all of us