laser-lovers@uw-beaver (laser-lovers) (10/30/84)
From: Richard Furuta <Furuta@WASHINGTON.ARPA> 1) 29-Oct chris@maryland (Chri Imagen 8/300 bug? 2) 29-Oct chris@maryland (Chri Sigh... (more on 8/300 bug) 3) 29-Oct chris@maryland (Chri Aha! (final words on 8/300 bug) Message 1 -- ************************ Date: Sun, 28 Oct 84 15:37:21 est From: chris@maryland (Chris Torek) Message-Id: <8410282037.AA05626@maryland.ARPA> To: laser-lovers@washington Subject: Imagen 8/300 bug? I have discovered what appears to be a bug in the 8/300's impress language driver. I have various files that consistently crash the machine in one way or another. The same file, reorganized slightly, works. I think the key is that the files that break the Imagen have lots of glyph definitions interspersed with the text of a page; I suspect that there is a bug in the memory allocator. The moral of the story is: if you write a program to talk to the Imagen, try to download fonts outside of pages; it seems to work better. (``I have no doubts that we shall hear from Imagen momentarily'', he said dryly. ---Seriously, Imagen has been very good about fixing things [not that we've had much that needed fixing], but this note may save someone else hours of hair-pulling.) Chris Message 2 -- ************************ Date: Sun, 28 Oct 84 17:02:50 est From: chris@maryland (Chris Torek) Message-Id: <8410282202.AA06439@maryland.ARPA> To: laser-lovers@washington Subject: Sigh... (more on 8/300 bug) another nice theory shot to h*ll: to test my "glyph allocation" 8/300 bug hypothesis, I changed the code to download glyphs before starting each page, and it didn't fix things. Oh well, back to the drawing board. (I guess others get to tear their hair out too.) Chris Message 3 -- ************************ Date: Sun, 28 Oct 84 20:40:42 est From: chris@maryland (Chris Torek) Message-Id: <8410290140.AA09133@maryland.ARPA> To: laser-lovers@washington Subject: Aha! (final words on 8/300 bug) Well, it turns out it's not much of a bug. If you define a glyph with a size of zero, it does various random nasty things to the Imagen. That was the whole problem. Now if I can only get this hair back onto my head.... Chris -------