Dear List Members: We have recently had an old Tandy 4825sx, serial# 002270, model# 25-5142 donated to us. We have no documentation on the system. We intend to use it in a small library with a reference encyclopedia CD - dedicated to this use. It currently has Win 3.1 installed which is fine for this purpose. We would like to upgrade the memory from the current 4 megs to 8 megs which will give much better performance under Win 3.1. I looked at the motherboard and it takes 30 pin simms and there are 9 chips to a simm. There are 8 slots and 4 slots are empty. I could not find any info at Radio Shacks web site about the unit. In searching for memory I found listed: 1meg - 1*9 - 60ns, 70 ns, and 80 ns Is this the memory that I would need? And can we just go with the fastest memory? Is parity and non-parity and issue or is this all parity memory? Also, I understand that the memory has to be added in banks of four? Is that correct? (I have never bought these older simms before) Also, anyone know a source for any cheap used printers. Thank you in advance for you help! Sincerely, John Rinehart PCBUILD maintains hundreds of useful files for download visit our download web page at: http://nospin.com/pc/files.html