jason@cs.utexas.edu (Jason Martin Levitt) (02/10/90)
In article <6530@uhccux.uhcc.hawaii.edu> yuan@uhccux.uhcc.hawaii.edu (Yuan 'Hacker' Chang) writes: > > FYI -- The IIci (not the IIcx) will do parity detection when fed >x9 SIMMs. That's the good news. The bad news is that all it does with >that information is to ask you to restart (according to the manual). I'd >much prefer to be given a chance to recover from the error. If I'm working >on a 2M document on a 32M machine, I wouldn't want a flipped bit where it >doesn't count to cause me to loose my work. I think we'll stick with x8 >SIMMs... I thought that you had to order parity checking as an "optional feature" [quote from IIci Owner's Manual] and that it did not come standard with parity checking ability. Does the IIci automatically do parity checking when 1x9 SIMMs are used? ---Jason ----- Jason Martin Levitt P.O. Box 49860 Austin, Texas 78765 (512) 459-0055 Internet: jason@cs.utexas.edu | "Disneyland exemplifies the essence of UUCP : cs.utexas.edu!hackbox!jason | the American spirit and continues to BIX : jlevitt | show us the way to follow our dreams." | -Ronald Reagan [1990]
marc@Apple.COM (Mark Dawson) (02/10/90)
In article <1120@gort.cs.utexas.edu> jason@cs.utexas.edu (Jason Martin Levitt) writes: >In article <6530@uhccux.uhcc.hawaii.edu> yuan@uhccux.uhcc.hawaii.edu (Yuan 'Hacker' Chang) writes: >> >> FYI -- The IIci (not the IIcx) will do parity detection when fed >>x9 SIMMs. That's the good news. The bad news is that all it does with >>that information is to ask you to restart (according to the manual). I'd >>much prefer to be given a chance to recover from the error. If I'm working >>on a 2M document on a 32M machine, I wouldn't want a flipped bit where it >>doesn't count to cause me to loose my work. I think we'll stick with x8 >>SIMMs... > > I thought that you had to order parity checking as an "optional >feature" [quote from IIci Owner's Manual] and that it did not come standard >with parity checking ability. Does the IIci automatically do parity >checking when 1x9 SIMMs are used? > > ---Jason >----- You do need to order a IIci with parity. In this case, if you DON'T have parity SIMMs installed, everytime you boot, you'll get a message telling you that no parity was detected (it assumes that if you have a parity machine, you'll be using parity SIMMs). Also note that ALL of the SIMMs need to be parity, or the IIci will turn off parity--thus having 1mb parity SIMMs in bank A and non-parity SIMMs in bank B will cause the IIci to assume there's no parity installed (i.e. you've just wasted the extra cost of the parity SIMMs). Mark