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Author Topic: CV64 RAM  (Read 7485 times)

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Offline motorollinTopic starter

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CV64 RAM
« on: July 07, 2007, 10:30:13 AM »
How do I find out whether my CV64 has 2 or 4MB on board? According to the BBOAH they came in 2 or 4MB flavours, and I want to know whether mine has enough video RAM for 1280x1024x16 (which would use 2.5MB of RAM)

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moto
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Offline countzero

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Re: CV64 RAM
« Reply #1 on: July 07, 2007, 10:39:20 AM »
check sysinfo / boards
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Offline Amigaz

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Re: CV64 RAM
« Reply #2 on: July 07, 2007, 10:51:17 AM »
Check if all video ram sockets are occupied, if they are you've got 4 meg
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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #3 on: July 07, 2007, 01:19:56 PM »
@countzero
SysInfo reports the board size as 0kb! Bizarrely, ShowBoardsMUI reports it as 64MB :-?

@AMIGAZ
I've got several empty brown sockets on the card. Are they the video RAM sockets?

--
moto
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10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 

Offline Amigaz

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Re: CV64 RAM
« Reply #4 on: July 07, 2007, 01:24:35 PM »
Quote

motorollin wrote:
@countzero
SysInfo reports the board size as 0kb! Bizarrely, ShowBoardsMUI reports it as 64MB :-?

@AMIGAZ
I've got several empty brown sockets on the card. Are they the video RAM sockets?

--
moto


Yesss, if you fill them all up you will have a 4mb CV64  ;-)
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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #5 on: July 07, 2007, 01:35:49 PM »
Great! :-D So what type of chip do I put in the sockets? I think I counted 4 empty sockets so I assume I need 4x512k chips? But what type? Also does the card autoconfig the RAM or do I have to set a jumper to tell it how much to use?

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moto
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10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
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40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
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80  GOTO 10
 

Offline lorddef

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Re: CV64 RAM
« Reply #6 on: July 07, 2007, 01:53:35 PM »
Quote

motorollin wrote:
Great! :-D So what type of chip do I put in the sockets? I think I counted 4 empty sockets so I assume I need 4x512k chips? But what type? Also does the card autoconfig the RAM or do I have to set a jumper to tell it how much to use?

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moto


A long time ago I had a 1Mb S3 Trio and I desoldered 2 ram chipsoff a cirrus logic card, and put them in its spare sockets to get 2Mb.

I guess look for a similar old card with 2mb on board in the right config and pinch the chips.
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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #7 on: July 07, 2007, 01:57:09 PM »
Just looked on the CV64 photo on BBOAH and the sockets are populated with HM514260CJ7, but according to this datasheet, those chips are only 256k each :-?

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moto
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10  IT\'S THE FINAL COUNTDOWN
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50  NEXT C
60  NA-NA-NAAAA
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80  GOTO 10
 

Offline Oli_hd

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Re: CV64 RAM
« Reply #8 on: July 07, 2007, 02:10:38 PM »
It says "Number of Words = 256k" & "Bits Per Word = 16"
meaning its 512 thousand bytes but on a 16 bit data bus (so times the number of 16bit words by 2 to get what would be on an 8 bit bus, 8 bits being in a byte)
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Offline Bazzaq

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Re: CV64 RAM
« Reply #9 on: July 07, 2007, 02:58:22 PM »
I bought a 2mb cv64 not so long ago.. It's 2mb if the soj-brown sockets are empty. I pinched 4 chips from a 4mb pci s3 trio and put them in. Works no problems. I recall the virge and trio having different types of mem.

Look on ebay for trio pci cards with the brown sockets populated. Usually 512k chips. get 2x2mb cards or a 4mb and take em out.
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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #10 on: July 07, 2007, 03:03:39 PM »
@Bazzaq
Thanks! You reckon this card would have the correct chips on it? There are 4 soldered on and 4 in sockets, just like the CV64, and it says it's a 4MB card, so I guess they are the right ones.

--
moto
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10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 

Offline Framiga

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Re: CV64 RAM
« Reply #11 on: July 07, 2007, 03:04:00 PM »
look at the soldered 2 megs already installed and look for 4 identical chips:

814260-70 (FUJITSU)

not that easy to find in small quantities

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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #12 on: July 07, 2007, 03:08:31 PM »
@Framiga
Have already tried to find the same chips but can't find them for sale anywhere. See my post above - think I might have found a card with some compatible chips on but just need confirmation before I buy it.

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moto
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10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 

Offline Framiga

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Re: CV64 RAM
« Reply #13 on: July 07, 2007, 03:10:59 PM »
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Offline motorollinTopic starter

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Re: CV64 RAM
« Reply #14 on: July 07, 2007, 03:13:13 PM »
Yeah I did find that site, but I can't find anywhere on there to actually order anything!

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moto
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Code: [Select]
10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
40     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NA-NA-NAAAAA
50  NEXT C
60  NA-NA-NAAAA
70  NA-NA NA-NA-NA-NA-NAAAA NAAA-NAAAAAAAAAAA
80  GOTO 10
 
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