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@robey
robey / apple1-rom.txt
Last active May 22, 2023 03:49
apple 1 ROM disassembly
;
; the "monitor ROM" of an apple 1 fit in one page (256 bytes).
;
; this is my attempt to take the disassembled code, give names to the
; variables and routines, and try to document how it worked.
;
;
; an apple 1 had 8KB of RAM (more, if you hacked on the motherboard), and a
; peripheral chip that drove the keyboard and video. the video was run by a
; side processor that could treat the display as an append-only terminal that
@shamil
shamil / mount_qcow2.md
Last active May 30, 2025 18:10
How to mount a qcow2 disk image

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8