On my early 5170 (piggybacked RAM), which has both banks fitted, if I erroneously set the CMOS SETUP to 256KB of base RAM, then on startup I see the 5170 count up to 512KB (and then I get a '164-Memory Size Error' error). It's counting up to 512KB. So we can rule out an incorrect RAM setting in CMOS SETUP.The two new memory chips came in today. I replaced the bad chip with a good one, but the computer still only counts 256kb of RAM, even though both banks are populated. I did set the jumper on J18 to indicate that 512kb is installed on the computer. What's causing it to ignore Bank 1?
The SixPakPlus (both versions) is an 8-bit card. There will there be a performance hit by using an 8-bit RAM card in a 16-bit machine.One more thing. The AST SixPak Plus (short) manual says that if the computer has an existing 512KB of onboard RAM, then the highest amount of RAM the SixPak can have is 128KB, thus totaling 640KB. Does this mean that the SixPak will ignore all but 128KB of the RAM it has? It is fully populated and I'm trying to get the computer to use it's RAM combined with the SixPak's RAM.
I've got a NIB NOS Intel Above Board Plus with manual and software still shrinkwrapped. And, the board is fully populated with 2 mb.The SixPakPlus (both versions) is an 8-bit card. There will there be a performance hit by using an 8-bit RAM card in a 16-bit machine.
Also, the SixPakPlus is not described by AST as being compatible with the AT. There may be issues, some subtle.
You really need to find a 16-bit RAM card.
This disappoints me. I'm sure the previous owners read the manual too.modem7 said:Also, the SixPakPlus is not described by AST as being compatible with the AT. There may be issues, some subtle.
You really need to find a 16-bit RAM card.
That would be a good fit for my AT. How much would you like for it?Stone said:I've got a NIB NOS Intel Above Board Plus with manual and software still shrinkwrapped. And, the board is fully populated with 2 mb.
It sounds like you had a failure of RAM in the 512K to 640K region (supplied by your SixPakPlus I presume), and the 5170 warned you of the error.Well the error came back again. Somehow in the last time I booted it, it counted 640KB of RAM, but this boot it only counted 512KB. So I went back into the BIOS setup and changed it to 512KB. The error went away on the next boot.