| Author |
Topic |
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muzhok
New Member
Germany
91 Posts |
 Posted - 02 May 2003 : 12:50:24
Low end mac and other sites mention in their spec sheet of the Performa 475 that there are 2 VRAM slots. The machine I found in the trash (which was smoked in a fire, but has since aired out) chimes up properly when booted, but the monitor didn't kick in. When I opened up the case, I immediately noticed that there was no VRAM chip AND that there is only 1 slot. Is this the right board and did someone just change the case? There are 2 8Mb 72-pin SIMMS installed and that is it.
Any ideas on why there is a discrepency? |
Jobf
Junior Member
United Kingdom
162 Posts |
Posted - 02 May 2003 : 13:10:00
LC475/Performa 475/Quadra 605 have:2 slots VRAM. 2x256kb or 2x512kb
The 1 slot is RAM - 72pin SIMM Your empty slot is the RAM slot. The 2x8mb SIMMs are either 256kb or 512kb VRAM simms. Edited by - jobf on 02 May 2003 13:12:05 |
muzhok
New Member
Germany
91 Posts |
Posted - 02 May 2003 : 13:25:35
Thanks! That explains a lot. Anyway, I just got it working. I had to flip on the power switch a few times and it finally booted, showing the monitor. Probably a pram problem. So I guess I am working on the 4 MB motherboard RAM and can fit in a 32 MB stick, if I could find one. Well this is great news. How can I determine how much VRAM is installed?
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Jobf
Junior Member
United Kingdom
162 Posts |
Posted - 02 May 2003 : 13:47:16
Yes, the booting problem is a flat PRAM battery.
To determine VRAM, see:
http://docs.info.apple.com/article.html?artnum=13596 Jobf. |
maclover5
LC Doctor/Hot Rodder
Australia
5830 Posts |
Posted - 02 May 2003 : 23:06:43
How many colours can you get and at what resolutions?512k total:
512x384 @ Thousands
640x480 to 832x624 @ 256 colours
1024x768 and 1152x870 @ 16 colours 1 meg total:
512x384 @ Millions
640x480 to 832x624 @ Thousands
1024x768 and 1152x870 @ 256 colours
--------------------------
Give your dreams a chance.™ - Apple in the mid '90s Warrior maclover5
68k Macintosh Liberation Army
Number of 68ks Liberated: 7
Number of Contraband (PPC) Liberated from the Dumpster:
1 |
muzhok
New Member
Germany
91 Posts |
Posted - 03 May 2003 : 05:36:47
I get 32,768 colors at 512x383, so I guess that clears up that question. Thanks!
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cory5412
68KMLA Comrade-in-Arms
USA
4679 Posts |
Posted - 03 May 2003 : 13:43:36
hehe... 512 by 384 is a cool resolution  that 12" monitor was one of the best lil' monitors everjust gotta love 640 by 480 on the AudioVision 14" though.... I've made mine work at 800 by 600 in BeOS Official 68k videographer
Official MLA TourGuide |
maclover5
LC Doctor/Hot Rodder
Australia
5830 Posts |
Posted - 03 May 2003 : 14:29:09
<brag mode>Cory: it will never beat a nice 1710.   </brag mode> -------------------------- Give your dreams a chance.™ - Apple in the mid '90s Warrior maclover5
68k Macintosh Liberation Army
Number of 68ks Liberated: 7
Number of Contraband (PPC) Liberated from the Dumpster:
1 |
Performa 475 VRAM
68k of the Week: kastegir's PowerBook 180.