Search site Dead Hackers Society
Other BBSes »

Silly Venture 2019

Sommarhack 2019
Demoscene   º   Coding   º   CT60   º   Buy/sell   º   Misc/crap   º   Alive magazine   º   SNDH/Tracking

Atari coding BBS
Re: DSP memorymap problem
Posted by: insane/tscc Jun,27.2018-15:16 

It is like tat said - 160*120=19200 is bigger than the 16384 dsp word space available for X and Y memory. If your code is not in 0000..01ff you'll end up overwriting your own code. If you overwrite X:0x3800 you'll overwrite the TOS communication code/debugger.

From my notes: (dunno if it helps)
X/Y-Mem 0000-01ff: RAM/ROM
X/Y-Mem 0200-3fff: 16k Words RAM
X/Y-Mem 4000-7fff: 16k Shadow of 0000-3fff
X/Y-Mem 8000-ffff: Reserved

Prg-Mem 0000-01ff: Internal RAM
Prg-Mem 01ff-3fff: Same as Y-RAM 01ff-3fff
Prg-Mem 4000-7fff: Same as X-RAM 0000-3fff
Prg-Mem 8000-ffff: Reserved

[All messages in this thread]

Topic Posted by  Date 
DSP memorymap problem Emphii Jun,26.2018-21:56
  Re: DSP memorymap problem Emphii Jun,26.2018-21:58
    Re: DSP memorymap problem mikro Jun,27.2018-10:24
      Re: DSP memorymap problem Emphii Jun,27.2018-11:25
  Re: DSP memorymap problem tat Jun,27.2018-12:25
  Re: DSP memorymap problem ggn Jun,27.2018-14:31
  Re: DSP memorymap problem insane/tscc Jun,27.2018-15:16
    Re: DSP memorymap problem Emphii Jun,27.2018-23:27
      Re: DSP memorymap problem tat Jun,29.2018-15:35
        Re: DSP memorymap problem Emphii Jul,03.2018-20:14
          Re: DSP memorymap problem Daniel / New Beat Jul,05.2018-00:07
            Re: DSP memorymap problem Emphii Jul,05.2018-14:22
              Re: DSP memorymap problem mikro Jul,06.2018-08:15
          Re: DSP memorymap problem mikro Jul,06.2018-08:17
            Re: DSP memorymap problem Emphii Jul,12.2018-23:09

Message board and comments are now read-only

Due to abuse of the message boards we have put the entire site in read-only mode. That means you can't post new threads or reply to old messages and you can't add comments in VideoDB and PicDB.

Some messages have been erased from reading, but are stored in case they need to surface again.

After 17 years and 45000 messages we're shutting down due to one person.

© 1994-2019 Dead Hackers Society Contact: Anders Eriksson