Dead battery is all.

162 => CMOS checksum error or adapter ID mismatch (Hardware configuration does not match saved information.)

163 => Date and time not set.

There could be more RAM in there but it will not show up without the machine being setup correctly and that means a reference disk and a working battery.

http://mypage.intergate.ca/~fspencer/8580prob.htm <== link shows the battery type you can replace it with.

http://www.walshcomptech.com/selectpccbbs/rf7080a.zip <== Reference disk for a normal Model 80.

http://www.walshcomptech.com/selectpccbbs/rf80plan.zip <== Reference disk for a Model 80 with a Reply motherboard.