English Amiga Board Amiga Lore



Go Back   English Amiga Board > Support > support.Hardware

 
 
Thread Tools
Old 02 March 2010, 16:04   #1
Reynolds
Alien Breeder
Reynolds's Avatar
 
Join Date: Dec 2007
Location: Szigetszentmiklos / Hungary
Age: 36
Posts: 486
Send a message via Skype™ to Reynolds
HowTo: Amiga 500 speedup w/ oscillator

I've been thinking to speed up my Amiga 500 with a new oscillator on the mobo. Is it possible somehow? It has an Amiga A590 with 2Megs of Fast Ram, and 1 mb chipram on board.
I know that Icould sweep through the net for solutions, but first of all I would like to see experiences if it can be done. how the machine performs, fails, and so on. I don't want to build up a nuclear plant from it, just see more frames in games with vector gfx.
So, can it be done?

Thanks for all,
Reynolds is offline  
AdSense AdSense  
Advertisement:
Old 02 March 2010, 16:14   #2
DDNI
Targ Explorer

DDNI's Avatar
 
Join Date: Mar 2006
Location: Northern Ireland
Age: 40
Posts: 4,826
Send a message via ICQ to DDNI Send a message via MSN to DDNI
The custom chips need the original osc for their timing. If you change the oscillator then you can expect problems.
DDNI is offline  
Old 02 March 2010, 16:15   #3
s2325
Zone Friend

s2325's Avatar
 
Join Date: Jun 2006
Location: Gargore
Age: 34
Posts: 13,339
Yes, Pinball Fantasies is unplayable without near perfect timing, I'm sure there are more.
s2325 is offline  
Old 02 March 2010, 16:28   #4
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 39
Posts: 13,782
It is practically impossible to do (without separating CPU clock from chipset clock, like 14MHz 68000 hacks do)

In theory crystal can be changed and system keeps working, Amiga programs won't see any difference (as long as chips can handle new clock rate) but user surely will

Video timing changes (=signal becomes incompatible with PAL or NTSC), audio pitch changes, floppy timing changes (floppy access stops working), expansion hardware most likely stops working, everything that is connected to "outside world" changes..
Toni Wilen is offline  
AdSense AdSense  
Advertisement:
 


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Amiga Forever HD install howto ipp0 support.Amiga Forever 3 21 January 2012 13:07
HOWTO: Installing Amiga Applications mfletcher New to Emulation or Amiga scene 4 21 September 2009 22:53
where can i get an 80mhz oscillator DoogUK support.Hardware 2 08 April 2008 15:35
Good speedup patches for an ECS Amiga? AMIGAZ support.Other 8 03 June 2007 15:30
WTB: Amiga 600, 500, 500 +, 1200 (NTSC) JeremyDay MarketPlace 2 30 November 2006 03:27

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 11:17.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Page generated in 0.09913 seconds with 11 queries