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@kissa.bsky.social
83 followers 640 following 40 posts
Tomfoolery, nincompoopery, programming
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longwall26.bsky.social
For sale: baby jetpack. Worn once
January 9, 2025 at 11:24 PM
It's been a while, maybe time to get back to computer and write something
December 30, 2024 at 7:12 PM
What if we made a social network where instead of liking, blocking and muting, you would “hush” and “boost” posts?

Hushing would decrease visibility to your followers. Boosting would increase it.

Who’s with me?
November 13, 2023 at 7:31 AM
People in Bluesky vs. people in Place Previously Known As Twitter
Tweet by @heydonworks that sparked some controversy in 2019: What do you like to do when you're not coding? Vue-based developer: I am fond of cooking, getting stuck into a good graphic novel and— React-based developer: WEIGHTS. BROING DOWN. MORE WEIGHTS. TRUMP. WEIGHTS. GUNS. THE FREE MARKET.
November 7, 2023 at 3:50 PM
“Can you explain this gap in your resume?”

Yes, child; that was when I carried you
November 5, 2023 at 9:24 PM
Good two hours reserved for today, let's continue with immediate instructions. Since we have augmented mode too, there's quite a bunch of these.

Instructions that logically take only 1 argument don't make sense, such as INC/DEC, and some potential ones like NEG, NOT, CLR. Except for MOV.
Immediate instructions with 16-bit operand (32-47), plus augmented ones (48-63) (Details omitted due to space constraints) addi op1, op2, imm16 ; op1 <- op2 + imm16 00100000 subi muli divi modi andi ori xori shli shri add1i sub1i movi addai op1, imm16 ; op1 <- op2 + imm16 00110000 subai mulai divai modai andai orai xorai shlai shrai incai decai nopai
October 19, 2023 at 8:08 AM
Day 3 and can't decide whether to take a nap or get a coffee. Good 2 hours to go and some code needs written. Maybe should expand this poor opcode list today
export const opcodes: { [key: number]: string } = { 0b00000000: "add", // add <dst> <src1> <src2> - dst <- src1 + src2 0b00000001: "sub", // sub <dst> <src1> <src2> - dst <- src1 - src2 0b11110000: "hlt", // hlt <?> <?> <?> - halt program execution 0b11110001: "hcf", // hcf <?> <?> <?> - halt and catch fire }
October 18, 2023 at 11:01 AM
Day 2 of virtual machine hacking, think I’ll do byte addressing now
Autumn
October 17, 2023 at 8:19 AM
Operands are now simply 8 bits and denote memory addresses 0x00 to 0xff. I have a slightly more complex design in mind but let's get some syntax defined first. This also details how to address lower and higher parts of registers:
Syntax [M] means the word at memory address M. [M].b means the byte at memory address M. When read, it is sign-extended to a word. <reg> is equivalent to [addressof <reg>], where <reg> is one of registers (a, b, c, d, x, y, i, j, p, q, sp, pc), and addressof <reg> is the memory address of the register according to the table below. <reg>.hi is equivalent to [address of <reg>].b <reg>.lo is equivalent to [address of <reg> + 1].b Table of registers and their addresses: a: 0x0 a.hi: 0x0 a.lo: 0x1 b: 0x2 b.hi: 0x2 b.lo: 0x3 c: 0x4 c.hi: 0x4 c.lo: 0x5 d: 0x6 d.hi: 0x6 d.lo: 0x7 x: 0x8 x.hi: 0x8 x.lo: 0x9 y: 0xa y.hi: 0xa y.lo: 0xb i: 0xc i.hi: 0xc i.lo: 0xd j: 0xe j.hi: 0xe j.lo: 0xf p: 0x10 p.hi: 0x10 p.lo: 0x11 q: 0x12 q.hi: 0x12 q.lo: 0x13 sp: 0x14 sp.hi: 0x14 sp.lo: 0x15 pc: 0x16 pc.hi: 0x16 pc.lo: 0x17 Finally: <regi> is one of x, y, i, j <rega> is one of p, q, sp, pc
October 16, 2023 at 1:26 PM
A nice, crisp autumn’s day. A good day to write a virtual machine and an assembler for it.
October 16, 2023 at 6:32 AM