--- Jeff Walther <[EMAIL PROTECTED]> wrote: > There are many NuBus video cards which will provide > 24 bit color on the IIci.
There's also the 24AC, which is also Power Mac compatable. (Meaning that the acceleration functions work on PPC as well as 68k.) You DO NOT want version 1.0 of the 24AC. It does not work with System 7.5.3 or newer. Version 1.1 is the one to get. > Daystar made the PowerCache accelerater which was a > 68030 based > accelerator, which is the same CPU found in the Mac > II series and in > the SE/30. However, the accelerator runs at 33 MHz > or 50 MHz. > There may have been other speeds, but those are the > two I've seen. The 030 PowerCache had 32k onboard cache and came in 25, 33, 40 and 50Mhz versions, with optional matching speed 68882 FPU. Most had both chips in sockets, some of the 25Mhz ones had surface mounted CPU. They can be upgraded, if you want to unsolder the clock crystal and replace it along with the CPU and FPU. > If you get the 50 MHz version, that should, in > theory double the CPU speed of your IIci, Yeah, baby! The 50Mhz with FPU is nice and fast, especially with lots of RAM in the IIci so you can run without virtual memory. I had 80megs in mine. The 030 PowerCache requires the control panel to operate. First you install the card and boot up. Then drop the control panel onto the System folder and let it put it in Control Panels. Reboot! DO NOT run the CP and flip the "switches" to enable it! If you "enable" before rebooting, you'll have to reboot with extentions disabled, remove the CP, reboot and install it the right way. Now you may run the CP, flip the switches and reboot to 50Mhz. The PowerCache switch enables the upgrade. The PowerMath switch redirects certain SANE math routines from the CPU to the FPU (even the onboard 25Mhz FPU if the PowerCache doesn't have one) to supposedly speed up those math functions. > Daystar also made the Turbo040 accelerator based on > the 68040 CPU. There's also the Turbo 601 in 66 and 100 Mhz versions. The later 66Mhz ones were actually made with 100Mhz CPUs and some of the later 100Mhz ones got 110Mhz. A 66Mhz one with an underclocked 100Mhz CPU can be "overclocked" to 100, but it's a difficult operation that involves finding an out of production chip as well as the faster crystal, and moving some other surface mounted parts. I've not seen anything on overclocking the 100Mhz Turbo 601. They both have 128K L2 cache onboard. They require at least System 7.5, and originally shipped with that version on floppy disks. These do NOT require their control panel to be in the Control Panels folder.When enabled, it sets something in PRAM so that it's on the 601 at power on. You also get the early PowerMac startup sound. :) >From then on your "Power IIci" thinks it is a "Powermac 475". That's because Apple only sold 601 upgrades for Macs with 040 CPUs, and apparently the way the model ID's are organized, the IIci would be just "below" the LC475, for which there are 601 upgrades, so the IIci/601 combo gets assigned the name and icon for an upgraded 475. The Turbo 601 will happily run OS 8.1, just keep a 7.6 68k Disk Tools floppy handy for when you zap the PRAM. There are also hacks to make OS 8.5 and 8.6 run on them. I don't know if anyone has made OS 9 or 9.1 run on a Turbo 601. There's a Turbo 601 enabler. Systems prior to Mac OS 7.6 always require the enabler. 7.6.x only requires the enabler on a boot floppy. 8.1 does not require the enabler at all. The Apple 601 Upgrade control panel will disable a Turbo 601, but cannot re-enable it because it's only intended for 601 upgrades installed in Macs with an onboard 040 CPU. I never tested to see if the Turbo 601 could boot from an HFS+ volume. The Turbo 601 has SCSI Manager 4.3 in its ROM, but it appears to be a buggy implementation. The control panel can enable or disable it, but no program I tried that requires SM 4.3 could tell it was there. I assume that's because the programs checked for the model of Mac and somehow "saw through" the T601's ROM that the Mac was a IIci, and since the IIci doesn't have SM 4.3, therefore it doesn't, period, even though with a T601 and the SCSI Manager 4.3 enabled, it does. (There's an excercise for a Mac programmer, figure out how to A. detect the T601's SM 4.3 B. write an extention to force all apps that need SM 4.3 to find it in the T601's ROM.) It will be total Fandemonium! August (Fri) 4th, (Sat) 5th & (Sun) 6th, 2006 http://www.fandemonium.org __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Vintage Macs is sponsored by <http://lowendmac.com/> and... 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