sk2f+@ANDREW.CMU.EDU ("Seth D. Kadesh") (09/08/89)
12:13 AM - just finished reading ALL of the postings from about the middle of
May through Sept. 7 !! What a job!!! Must keep up with news, though!
Here's my question: If I go to the control panel, and examine the Ram Disk
right after I turn the machine on, I see the following figures:
84 k in use
683 k free
Adding this up gives a figure of 767 k. My classic "Woz" has 256 k on board
memory, and an AE GS-Ram card populated with 512 k. Total = 768 k ?! Not that
I've ever had any difficulties in the three years I've owned the machine... but
I'm just curious. And what is using 84 k of RAM at power-up? (I hit control-
reset, so I'm not executing anything - I thought everything was in ROM?!)
Sorry if this is a rehash of questions already asked.
- seth kadesh
tHe mAd ScienTisT, and other carnations.
Coming soon: tmS Software - as soon as I get TML Pascal IIdlyons@Apple.COM (David Lyons) (09/09/89)
In article <wZ1oAu200WB408On9a@andrew.cmu.edu> sk2f+@ANDREW.CMU.EDU ("Seth D. Kadesh") writes: >[...] If I go to the control panel, and examine the Ram Disk >right after I turn the machine on, I see the following figures: > 84 k in use > 683 k free >Adding this up gives a figure of 767 k. My classic "Woz" has 256 k on board >memory, and an AE GS-Ram card populated with 512 k. Total = 768 k ?! [...] Don't worry about a missing K: it sounds like the displayed values are just being rounded *down* to a whole number of K. >[...] And what is using 84 k of RAM at power-up? (I hit control- >reset, so I'm not executing anything - I thought everything was in ROM?!) "Used" is a misleading term for some of that 84K. Using the Memory Peeker right after a self-test reveals the following breakdown of that 84K on my ROM 01 machine: There are several areas that are marked permanently allocated, since they are used in special ways (the Memory Manager can't allocate them like most areas of memory): 2K at $00/0000 (including text screen) 16K at $00/C000 (softswitches and language-card space) 2K at $01/0000 (includes part of 80-column text screen, etc) 16K at $01/C000 (softswitches and auxiliary language-card space) 8K at $E0/0000 (system-owned space--various uses) 24K at $E0/C000 (softswitches, language card, plus system-owned space) 16K at $E1/C000 (softswitches, language card) And, finally, there are 4 blocks totalling less than 200 bytes, for various parts of the toolbox. (Amazingly enough, that adds up to just over 84K.) By the way--the above numbers are for curiosity-satisfaction purposes only... see appropriate documentation if you want to know what things are guaranteed. -- --Dave Lyons, Apple Computer, Inc. | DAL Systems AppleLink--Apple Edition: DAVE.LYONS | P.O. Box 875 AppleLink--Personal Edition: Dave Lyons | Cupertino, CA 95015-0875 GEnie: D.LYONS2 or DAVE.LYONS CompuServe: 72177,3233 Internet/BITNET: dlyons@apple.com UUCP: ...!ames!apple!dlyons My opinions are my own, not Apple's.