English Amiga Board


Go Back   English Amiga Board > Support > support.WinUAE

 
 
Thread Tools
Old 18 May 2013, 09:40   #1
moshy
 
Posts: n/a
32-bit Fast RAM slower than 24-bit Fast on certain A1200 config

In the latest version, Z3 Fast RAM is caused to run at the same latency as Slow RAM. This occurs when selecting the cycle-exact A1200 configuration and starting the emulation without disabling 24-bit addressing first. Most of the hardware settings are set to the defaults with the exception of RAM, which was part of the issues occurring.

AIBB shows the ordinary Fast RAM operating at a latency index of 0.6. Slow indicates an index of 1.1. Z3 Fast takes on the latter index instead of the former if the emulator was configured as above. This can have a performance impact while Z3 RAM is enabled, because Autoconfig is giving it more priority than 24-bit Fast memory. The difference in performance is more noticeable if you have set the CPU speed to a higher than default value.

The best way to get around it is to disable 24-bit addressing before you start the emulation. Other than that, no other real problems.
 
Old 24 May 2013, 21:55   #2
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 45
Posts: 23,883
What is this "certain" A1200 config? (Note that I can't find anything that could explain this.)
Toni Wilen is online now  
 


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Similar Threads
Thread Thread Starter Forum Replies Last Post
Use of 4MB PCMCIA Fast Flash Memory as Fast RAM in A1200 nkarytia support.Hardware 10 16 September 2011 13:37
8 bit to optimized 6 bit palette histogram improvements needed NovaCoder Coders. General 0 14 April 2011 02:13
A1200 8MB Fast Ram Card + FPU @ 40mhz Zetr0 MarketPlace 14 23 July 2010 21:29
Another music demo which plays a "bit" fast... andreas support.Demos 5 05 September 2009 13:30
32-bit FAST RAM vs. ZII FAST RAM polbit support.Hardware 16 28 January 2007 20:16

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +2. The time now is 21:30.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.
Page generated in 0.06586 seconds with 13 queries