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- id m0tmR6u-0007q3a; Tue, 13 Feb 96 13:14 MST
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- From: Clifford T. Matthews <ctm@ardi.com>
- Newsgroups: comp.emulators.mac.executor
- Subject: Re: screen refresh
- Date: 13 Feb 1996 12:57:55 -0700
- Organization: ARDI
- Lines: 44
- Message-ID: <ufag2n0zi4.fsf@ftp.ardi.com>
- References: <311D2407.39F0@ix.netcom.com> <1iqHxoHpvahK089yn@skypoint.com>
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- In-reply-to: rsteiner@skypoint.com's message of 11 Feb 1996 23:30:56 -0600
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-
- >>>>> "Rich" == Richard Steiner <rsteiner@skypoint.com> writes:
- In article <1iqHxoHpvahK089yn@skypoint.com> rsteiner@skypoint.com (Richard Steiner) writes:
-
-
- Rich> Here in comp.emulators.mac.executor, Steve Duhaime
- Rich> <smd3@ix.netcom.com> spake unto us, saying:
-
- >> With the help of a kind person I figured out how to change
- >> screen resolution, can I change the refresh rate?
-
- Rich> Typing "executor -help" at the DOS prompt will give you a
- Rich> whole list of command-line options. You can use "executor
- Rich> -help > help.txt" to redirect the output to a text file
- Rich> (it's more than one screen long).
-
- Rich> One of those options (-refresh) allows you to change the
- Rich> refresh rate. Also, you can use Control-Apple-5 when inside
- Rich> a program to change a number of different things for that
- Rich> program.
-
- There may be some confusion here.
-
- There are two different refresh rates and I suspect Steve and Rich are
- talking about two different ones.
-
- One rate is the rate at which the image on the monitor is drawn by the
- electron beam. That rate can't be adjusted by Executor.
-
- The other rate only comes into play when some programs write directly
- to screen memory and expect the results to immediately be displayed on
- the screen. Under many Operating Systems, Executor isn't able to map
- the screen into memory in such a way for this to work. In that case
- Executor needs to periodically copy from the pretend screen to the
- real screen. That is what "-refresh n" does, where "n" is the number
- of sixtieths of a second to wait in between repainting. These days
- Executor will automatically detect programs that require refresh and
- set refresh to 10 (i.e. 6 updates a second), which is a compromise
- number (if your CPU can handle it, setting refresh to 3 makes games
- much more smooth).
-
- Sorry for the confusion.
-
- --Cliff
- ctm@ardi.com
-
-