mp1w#@andrew.cmu.edu (Marc Russell Pawliger) (05/20/87)
Two qwestshuns: 1) How exactly does PackBits pack bits? IM says that it takes any three consecutive identical bytes and compresses them. Must this be on a word boundary? What signals to UnpackBits that the next byte is actually a repetition? Specifically, I want to take a MacPaint document, which consists of 720 PackBitted packed bit 'arrays' and convert them back to their original bits - on a non-mac machine. So I need the algorithm that packs the bits. 2) I just got an SE to use, and I started it up with RamDisk+1.2. I load in the whole 5.4/4 System Folder, and then the startup disk ejects. Now I can work diskless, etc. I decide to copy MacWrite over from another disk onto the RamDisk. Fine. Then I get the old bombola. OK, I choose to reset. The Mac dings the bell, goes through the memory test (or seems to, since it takes the same amount of time with the diagonally striped screen up as it does on startup) and I insert the same startup disk as before. The 'Welcome to Macintosh' banner appears, and RamDisk+ starts. RamDisk+ puts up its start messages - and then ejects its own disk - without copying anything to the RamDisk. However - the RamDisk that shows as the only disk on the desktop still contains the system folder AND the MacWrite that I had copied earlier. How does a RamDisk survive a soft reset? I thought all of memory was wiped during the memtest... Marc Pawliger mp1w#@andrew.cmu.edu mp1w@cmuccvma.bitnet