The Woz Wonderbook (1977) [pdf]

[signa11]

http://www.digibarn.com/collections/books/woz-wonderbook/Apple2WozWonderbook1977.pdf

[jcmeyrignac]

I remember having found an optimization in the disassembler 30 years ago, and I was so proud of me.

It's on page 51, we can replace:

  LSR
  BCC EVEN
  LSR 
  BCS ERR
  CMP #$22
  BEQ ERR
  AND #$7
  ORA #$80

with:

  LSR
  BCC EVEN
  ROR 
  BCS ERR
  CMP #$A2
  BEQ ERR
  AND #$87

saving 2 bytes !

[zwieback → jcmeyrignac]

Nice, every byte counted back then. Did you burn new EProms with your version? I remember doing that once just to see it work for some minor modification.

[jcmeyrignac → zwieback]

In fact, I was working on another computer, called "Oric 1", and tried to optimize a disassembler.

At this time, I spent several months optimizing the Basic ROM from Microsoft, but I never released anything.

[lukasschwab]

Link isn't loading for me––also on archive.org: https://archive.org/details/TheWozWonderbook

[sowbug → lukasschwab]

Also IPFS QmRLfN12i51FtvsmgQfGZ91K698dBPFei3oWDAjAH17NGQ Wozniak_Steve_The_Woz_Wonderbook.pdf

[sowbug → sowbug]

With metadata: https://ipfs.io/ipfs/QmcjbHP4XhQJjrmRyV1iHywdHQiwbUYdn8pEACU...

[Aloha]

Too bad most of the handwritten stuff is all but unreadable

[enthd]

This looks really cool, I just recently order a copy of The WOZPAK Special Edition: Steve Wozniak's Apple-1 & Apple ][ Computers on Amazon so this kind of thing looks awesome! Thanks for sharing.

[nappy]

This is really interesting, thank you for sharing.