30 Pin SIMM Module

[Agent Orange]

I have a Gigabyte GA-486-VF mobo (works great) with 8 x 1 (70ns) Hitachi memory. Part No. as follows: HM514800ALJ7. What I need to know is if anyone out there knows whether or not this memory is 8-bit non-parity or 9-bit parity. I have a shot to upgrade the memory on this mobo but must be sure before I commit $$. The owner manual does not state one way or the other. See attachment.

 

[channelmaniac]

Too small/fuzzy to read.

 

[per]

Examine it.

If it got 9 or 3 ICs, it's pairity. If it got 8 or 2 ICs, it's non-pairity.

 

[Agent Orange]

Per,

It's got 2 Hatachi 512 KB chips side-by-side (for a total of 1 MB) and a
BP41C1000A-6 parity emulator chip. So, I suppose it's non-parity?

Agent Orange

Ha ei deilig dag!

P.S. I tried

 

[channelmaniac]

You can use parity SIMMs in a non-parity system...

You can't do the opposite. Non-parity SIMMs won't work in a parity system unless you can turn off the parity checking.

 

[per]

Per,

It's got 2 Hatachi 512 KB chips side-by-side (for a total of 1 MB) and a
BP41C1000A-6 parity emulator chip. So, I suppose it's non-parity?

Agent Orange

Ha ei deilig dag!

P.S. I tried

The 512Kb chips are 1M*4 chips, and two of them makes 1M*8 (= 1 Mb).

The BP41C1000A-6 is acutally an 1M*1 RAM chip making it 1M*9 (= 1Mb with pairity, see http://www.telegraphics.com.au/~fthain/dram/index.html for other RAM labels), and it is the pairity bit (not an emulator chip, as it has no need to emulate pairity if it already exist).

Didn't know you knew some Norwegian. However, "ei" is used before 'female' objects, while "dag" is a 'male' object so you should use "ein" instead of "ei".

 

[Agent Orange]

PER,

Thanx for the info on the 30-pin SIMMS. Also, I try to brush up on my Norwegian.

 

[MikeS]

The 512Kb chips are 1M*4 chips, and two of them makes 1M*8 (= 1 Mb).

The BP41C1000A-6 is acutally an 1M*1 RAM chip making it 1M*9 (= 1Mb with pairity, see http://www.telegraphics.com.au/~fthain/dram/index.html for other RAM labels), and it is the pairity bit (not an emulator chip, as it has no need to emulate pairity if it already exist).

It would be a little less confusing if you used an upper case MB when you mean bytes as opposed to Mb which usually means Megabits...

Looks like you've invented a new system where M=Megabits and Mb=Megabytes; as they say, the great thing about standards is that there are so many of them ;-)

http://www.dewassoc.com/performance/memory/MB_vs_Mb.htm

BTW, another nitpick: that's "parity," not "pairity"

 

[per]

PER,

Thanx for the info on the 30-pin SIMMS. Also, I try to brush up on my Norwegian.

No problem. I've gone through all of my SIMM sticks and labbeled them myself some time ago, and information like that make tasks like that a LOT easier.

BTW, the correction I gave was for 'Nynorsk'. If you intendet to write in 'Bokmål', it should be just 'en' instead of 'ei'. I don't know how the Sami people (from the northmost parts of Norway/Sweeden/Finland/Russia) says it, so I can't give any spelling correction on that.