Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!julius.cs.uiuc.edu!apple!radius!lemke From: lemke@radius.com (Steve Lemke) Newsgroups: comp.sys.mac.hardware Subject: Re: Mac IIci video Message-ID: <1334@radius.com> Date: 12 Sep 90 17:09:44 GMT References: <2390@idunno.Princeton.EDU> Lines: 56 rlwald@phoenix.Princeton.EDU (Robert L. Wald) writes: } Is it better for the IIci to have 2 banks of memory }(say 1mb and 4mb) than just 1? I recall reading }somewhere that the built in video will tie up the }memory while it is working, but if its in 2 banks you can use }the other one without interruption. Also, can you specify which bank }(i.e. tell it to use the 1mb, even if the 1mb is the second bank }(assuming that you have to have the 4mb in the first bank as on }the lower macs))? From Apple Tech Note #176: Macintosh Memory Configurations: The IIci has a much-improved RAM interface and allows a great deal more freedom when installing SIMMs. Banks A and B are interchangeable, meaning that when mixing two sizes of RAM, the larger SIMMs do not necessarily >> have to go in Bank A. In fact, for best performance when using on-board << >> video, Apple recommends that the smaller SIMMs be installed in Bank A. << >> Note, however, that if on-board video is used, then RAM must be present << >> in Bank A. << The IIci requires that SIMMs be 80 ns RAS-access time or faster and the same speed within a row. You can implement the following memory config- urations with 256K and 1MB SIMMs: 1 MB using four 256 Kbit SIMMs in Bank A or in Bank B 2 MB using eight 256 Kbit SIMMs in Banks A and B 4 MB using four 1 Mbit SIMMs in Bank A or in Bank B 5 MB using four 256 Kbit SIMMs in Bank A and four 1 Mbit SIMMs in Bank B 5 MB using four 1 MBit SIMMs in Bank A and four 256 Kbit SIMMs in Bank A 8 MB using eight 1 Mbit SIMMs in Banks A and B The 1 MB and 4 MB configurations using only Bank B are not compatible with on-board video, since Bank A must contain memory when using on-board >> video. The first 5 MB configuration (with 256 Kbit SIMMs in Bank A) is << >> recommended for 5 MB configurations using on-board video. << So, basically, you can leave the 256Kbit SIMMs in Bank A, and install your 1MBit SIMMs in Bank B. This will result in better performance. } Also, can the Apple color monitor be used with a future 24 }bit card when I get tired of 8 bits? IS there a better monitor }for the ci which would (or better anyway)? Thanks Sure, the Apple color display will work with the Radius DirectColor/GX board in 1, 2, 4, 8, 16, and 24-bit modes. In addition it has on-board acceleration to make 24-bit mode run much quicker, and it supports NTSC output timing. [See related message thread in this very same newsgroup, with a subject of: Re: Best color monitor and card?] --Steve -- ----- Steve Lemke, Engineering Quality Assurance, Radius Inc., San Jose ----- ----- Reply to: lemke@radius.com (Note: NEW domain-style address!!) -----