Skip to main content
Retrocomputing

Questions tagged [assembly]

Ask Question

Assembly languages in general, of any architecture. Use with the particular processor’s tag as appropriate.

268 questions
Newest Active Bountied Unanswered
2 votes
1 answer
433 views

I'm trying to write an OS for the W65C02 CPU but i'm stuck because I have no idea on how to implement concurrency on such old CPU.
Elia C.'s user avatar
  • 29
2 votes
1 answer
374 views

are there people here who can assemble such old programs? I have only 2 such codes that I would like to assembly but I don't know how. Is this even possible? 1 Link: https://web.archive.org/web/...
David Johnson's user avatar
  • 409
2 votes
4 answers
414 views

I would like to write some interesting programs in assembler but I don't know where to start and how to do it. I would like a guide in simple language for dummies. Does anyone have a list of such ...
David Johnson's user avatar
  • 409
1 vote
1 answer
308 views

Ok, I know this is a very old computer but just for fun. I have figured out how to read keyboard (0177560 for checking, 0177562 for reading) and print it (0177564 for checking, 0177566 for writing). ...
Codesynth's user avatar
  • 121
11 votes
3 answers
1k views

I have a routine cpBCHL that compares the contents of BC and HL and returns the carry set appropriately: ; ---------------------------------------------------------------------- ; ♠BCHL ♣A ♡* ...
cjs's user avatar
  • 29.5k
9 votes
2 answers
2k views

I'm referencing this Space Invaders code. (I'm porting this to another processor and I'm trying to understand it.) The p1ShipsRem variable doesn't seem to be initialized, but it is tested early in the ...
Mike's user avatar
  • 943
8 votes
1 answer
703 views

According to dosfan, there are three known production versions of BIOS for IBM 5150 with the following datecodes: 04/21/81, 10/19/81 and 10/27/82. I am specifically asking about only the first one (...
tpimh's user avatar
  • 902
13 votes
5 answers
3k views

The C language always labelled signed overflow/underflow of integers "undefined behavior". I usually argue and say that this is an artificial construct created by C. On the assembler level ...
Lundin's user avatar
  • 1,024

15 30 50 per page
1
2 3 4 5
…
18