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CU Amiga Super CD-ROM 15
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CU Amiga Magazine's Super CD-ROM 15 (1997)(EMAP Images)(GB)[!][issue 1997-10].iso
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ShapeShifter
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VideoDrivers
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FastECS
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FastECS.doc
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FastECS version 1.2
Getting started
~~~~~~~~~~~~~~~
Copy the file named FastECS into the "Video Drivers" drawer in the
Shapeshfiter directory. Set the Screen Type to "External" and then select
"FastECS as the video driver. Also set the Color Depth to 4 bits (16
Colors) and select the screen size you wish to use. For best performance,
set this to 512x342. You may use any screen size you wish as long as
(Width*Height)/2 is less than or equal to 262144. The Refresh Rate
setting is ineffective since FastECS uses it's own refresh cues.
Discussion
~~~~~~~~~~
This software has some severe limitations, and will probably only work
for a small percentage of ShapeShifter users. One of the reasons for this
is that it uses specific features of the 68030 MMU, and there are a lot
of 68030s without MMUs out there (ie. 68EC030.)
I have included a tool to enable FastROM for A500 and A2000 owners. Oddly
enough, it is called FastROM. On a 3000, where FastROM is unnecessary, this
driver will create it's own MMU table as long as the MMU is not in use. I
have included another tool called PatchA3000MMU. This will allow FastECS to
work on a soft kicked A3000.
Memory usage is another issue. A screen size of 640x400 uses about 650k
of fast ram and 128k of chip ram. If you have lots of ram, then this will
probably not bother you too much.
Distribution
~~~~~~~~~~~~
This software is freely distributable as long as this documentation is
included with it. If you like it, send me some mail.
Disclaimer
~~~~~~~~~~
Use this software at your own risk. In no event will the author, Chris
Brenner, be liable for any direct, indirect, or consequential damages
resulting out of the use of or inability to use this software.
How to contact me
~~~~~~~~~~~~~~~~~
You can reach me either by mail, phone, or e-mail:
Chris Brenner
P.O. Box 161805
Sacramento, CA 95816
(916) 456-2940
cbrenner@calweb.com
History
~~~~~~~
Version 1.1 (Jan. 5, 1996)
·Screen sizes are no longer limited to 512x342 and 640x400.
·The screen mode is no longer forced to NTSC:High Res Laced
·The first 8k of memory is now mapped into 32 bit RAM, which significantly
improves both the Mac emulation, and the screen refresh performance.
·MMU configuration changed to 256k Level A page size, 1k Level B page size.
·FastROM tool included for A500/A2000 users.
Version 1.2 (Feb. 23, 1996)
·New code added to better handle display clipping.
·The screen is now opened with Autoscroll activated.
·The screen is now refreshed during short frames.
·PatchA3000MMU tool included for soft kicked A3000 users.
·Removed a bug from the FastROM tool which could potentially cause a crash
when the REMOVE option is used.