Inktober 2021 52 Week 6, Monster

Inktober 2021 52 Week 5, Remote

Inktober 2021 52 Week 4, Ancient

Inktober 2021 52 Week 3, Reflection

Inktober 2021 52 Week 2, Home

Got a new Mac with Catalina pre-installed, so had to compile my own version of Beebasm for the 64 bit OS.

BeebAsm.zip

Inktober 2021 52 Week 1, Fresh

BBC Micro machine code take on C64 10 Print one line random pattern generator.

Code at Github 10print.asm

\ 10 PRINT
\ Using BeebASM assembler
\ (c) Alastair Montgomery

INCLUDE "../lib/constants.asm"
seed = &70

ORG &2000

.start
    LDA #23
    STA seed
    LDA #63
    STA seed+1
    LDX #0
.char
    LDA chartable, X
    JSR oswrch
    INX
    CPX #23
    BNE char
.loop
    JSR random
    BMI two
.one
    LDA #224
    JMP print
.two
    LDA #225
.print
    JSR oswrch
    JMP loop
.finish
    RTS
.random
    INCLUDE "../lib/random.asm"
.chartable
    EQUB 22,0
    EQUB 23,224,8,8,12,7,224,48,16,16
    EQUB 23,225,16,16,48,224,7,12,8,8
.end

SAVE "MyCode", start, end

Recently had a need to get the CA Thumbprint from the Root certificate of a domain. This was for creating OIDC provider for an AWS EKS cluster.

This is the solution I came up with.

Been trying to relearn 6502 assembly language for fun, its a lot faster and easier than the first time on actual hardware when I was a teenager.

Been using a book I picked up from eBay Discovering BBC Micro Machine Code by A.P. Stephenson

Using BeebAsm assembler on my Mac with a BBC Micro emulator, rather than build in BBC BASIC one.

You can find my code at Github https://github.com/alastairhm/beebasm

This example draws a line of zeros to Mode 7, see screenshot below.