Power Mac 6100 once more ======================== I replaced the PROM battery: a LS14250 barrel-shaped battery. After bunch of unsuccesful attempts (I also re-seated near everything inside the Mac) it finally started. But the sound is gone for some reason. So I have learned several things: * The Kengighton ADB trackball is a nice thing and it works out of the box. * The AlphaSmart writing device is nice but must not be connected as a sole keyboard of the Macintosh. In this case the computer will not start (it says Error 11 and hangs). * I forgot that the Sonnet G3 upgrade is FAST (it's a 240 MHz CPU with a proper cache). The problem is now a small RAM and a slow disk (and the old bus might be an issue, too). * The 1024x768 resolution looks nice and the font rendering is excellent. Anyway, the overall speed of the computer is behing my 1994-era SGI Indy (175 MHz R4400SC CPU). It would be interesting to compare raw CPU power on some real data but it will need some time.