eps@toaster.SFSU.EDU (Eric P. Scott) (06/21/91)
[Not applicable to NeXTstation or base NeXTcube] If you're planning on ordering third-party memory for NeXTstation Color, first check what's actually in the machine. Our machines came with 1MBx36 (*not* 1MBx32) SIMMs. We ordered 72-pin SIMMs from South Coast Electronics. Someone (at our end) who's been too-well indoctrinated wrote in "low profile" before the order went out. South Coast's low-profile "SC-NEXT 4000/L" SIMMs have chips on BOTH SIDES--they are a *very* tight fit (i.e. touching) in the sockets. Since you don't need low profile memory for the slabs, I don't advise ordering low profile. (Note that NeXT does not use low profile 1MBx36s!) There doesn't seem any advantage in ordering 1MBx32 SIMMs for the Color slabs, especially considering John Graves' recent posting on parity vs. non-parity memory. P.S. 20MB is *not* enough to make a Color slab happy. -=EPS=-
jchin@wimsey.bc.ca (Joseph Chin) (06/22/91)
In article <1771@toaster.SFSU.EDU> eps@cs.SFSU.EDU (Eric P. Scott) writes: >[Not applicable to NeXTstation or base NeXTcube] >If you're planning on ordering third-party memory for NeXTstation >Color, first check what's actually in the machine. Our machines >came with 1MBx36 (*not* 1MBx32) SIMMs. We ordered 72-pin SIMMs >from South Coast Electronics. Someone (at our end) who's been >too-well indoctrinated wrote in "low profile" before the order >went out. South Coast's low-profile "SC-NEXT 4000/L" SIMMs have >chips on BOTH SIDES--they are a *very* tight fit (i.e. touching) >in the sockets. Since you don't need low profile memory for >the slabs, I don't advise ordering low profile. (Note that >NeXT does not use low profile 1MBx36s!) Eric is right! I forgot to mention that in my post. To get the SIMMs installed in my system, I eventually removed all the existing SIMMs, installed the new (low profile) SIMMs in the two slots closest to the power supply, followed by two original NeXT-supplied 1x36 SIMMs, and then the remaining 256x32 SIMMs. ---------------------------------------------------- | Power Supply | ---------------------------------------------------- ======== new SIMM#1 (1x36) from South Coast ======== new SIMM#2 (1x36) from South Coast ======== NeXT-supplied 1x36 SIMM ======== NeXT-supplied 1x36 SIMM ======== NeXT-supplied 256x32 SIMM ======== NeXT-supplied 256x32 SIMM ======== NeXT-supplied 256x32 SIMM ======== NeXT-supplied 256x32 SIMM There is a tight fit between SIMM#1 and SIMM#2, but they are NOT touching. There is a gap of approx. 1.5mm. NOTE: I found out yesterday by doing "m" from the ROM Monitor that the new SIMMs I bought from South Coast and the original NeXT-supplied 4MB SIMMs are all "1x36" parity SIMMs!!! But the remaining 1MB SIMMs are all "256x32" non-parity SIMMs!!! This is on a NeXTstation Colour ordered without the parity option. This mix has not affect my system in any negative way because the system has been configured to ignore parity checking in the "p" command of the ROM Monitor. :-) Joe -- Joseph Chin Wordcraft Systems Corporation jchin@van-bc.wimsey.bc.ca 201-434 West 12th Avenue (604)879-9687 (voice & NeXTfax) Vancouver, B.C., Canada V5Y 1V3 ********************* NeXT Registered Developer ********************