Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cwjcc!tut.cis.ohio-state.edu!att!cbnewsc!gpw From: gpw@cbnewsc.ATT.COM (george.p.wilkin) Newsgroups: comp.sys.att Subject: Re: Parity error in PC6300 Message-ID: <1069@cbnewsc.ATT.COM> Date: 31 May 89 15:07:50 GMT References: <4580@alvin.mcnc.org> Distribution: usa Organization: AT&T Bell Laboratories Lines: 56 From article <4580@alvin.mcnc.org>, by somers@mcnc.org (Robert W. Somers): > Where is ( are ) the following locations: > > 0D:8000:0000:0106:0104 > 0D:8000:0000:010A:0108 > 0D:8000:0000:0100:0152 I need to know the following: where is your ram and which bank holds what???? is bank 0 with 512k or is bank 1 with 512K is bank ?? with 128K ?? you're missing some info(and so am I) but here's what I know nnn KB ram fail:cc:y000:zzzz:wwww:rrrr cc= ram config 01 128K total (128K bank 0, bank 1 empty) 02 256K total (128K bank 0, 128K bank 1) 03 512K total (128K bank 0, 128K bank 1, 256K on exp board) 0? 512K total (512K bank 0) 05 640K total (128K bank 0, 128K bank 1, 384K on exp board) 0? 640K total (128K bank 0, 512K bank 1) 0D 640K total (512K bank 0, 128K bank 1) ?????????? y = bank failed 1= bank 0 128K (for 64k dram ) 2= bank 1 128K (for 64k dram ) 3= bank 0 exp 128K (for 64k dram ) 4= bank 1 exp 128K (for 64k dram ) 5= bank 2 exp 128K (for 64k dram ) ?= bank 1 row a (for 256K dram) ?= bank 1 row b (for 256K dram) 8= bank 1 row a (for 256K dram) ?= bank 1 row b (for 256K dram) 000 = segment failure zzzz = offset wwww = data written rrrr = data read Also note I think the 128K segmant map to existing ram regardless of conf. in a 640K machine with 512K in bank1 an error of 5(128K,bank 2 expansion ) would map to the last row of memory bank 1 with the proper offset added in. george -- George Wilkin AT&T Network Systems,(IH MAIN BL) 2000 N. Naperville Rd. Rm IH4A157 Naperville, IL. 60566-7033 att!ihlpf!gpw work ph# (312) 979-4317