Welcome, Guest. Please login or register.

Author Topic: Why did 1mb RAM make such a big difference on Amiga games and not on x86 games?  (Read 11904 times)

Description:

0 Members and 1 Guest are viewing this topic.

Offline olegil

  • Hero Member
  • *****
  • Join Date: Mar 2002
  • Posts: 955
    • Show all replies
@PhatBoiCollier:

You missed the point :-)

The first half meg was CHIP mem, the second half was SLOW mem (neither chip nor fast) accessed through the same timing on the motherboard, but outside the rather low address window the graphics and sound chips could DMA to. Cutting a trace in a jumper near the CPU and soldering in a small wire, so that two address lines from the CPU to Agnus swapped places, moved the SLOW mem into the CHIP mem range (late A500 motherboards with proper Agnus version only). I had 1M chip and 2M fast in my A500. Wasn't half bad then.
 

Offline olegil

  • Hero Member
  • *****
  • Join Date: Mar 2002
  • Posts: 955
    • Show all replies
Well, considering a harddrive might be able to sustain 20MB/s, and a CDROM might be able to sustain 5MB/s, I know which medium I would like to play a full CD texture-rich 3D game off of. Even worse is the difference in seek time (7ms vs 150ms...)