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- Short: PiccoloSD64 ext. driver for ShapeShifter
- Author: fdoro@gpnet.it (Francesco Doro)
- Uploader: fdoro@gpnet.it (Francesco Doro)
- Type: misc/emu
-
-
- PiccoloSD64 external 24 bit video driver for ShapeShifter
- 1996 by Francesco Doro (fdoro@gpnet.it)
- Public Domain
-
-
- SD64evd is an external video driver for the Macintosh emulator
- ShapeShifter. It supports only the 24/32 bit color mode of the graphics
- board PiccoloSD64.
-
- This driver uses the internal blitter of the SD64 for the refresh; that
- blitter is really powerful.
-
- A blitter done refresh gives the following advantages:
-
- - Speed: a 640x480 24 bit display takes 0.05 sec to be refreshed.
-
- - Doesn't need MMU.
-
- - It is CPU indipendent: the CPU has only to wait until the blitter
- finishes so the speed is the same on a 14 Mhz 68EC020 as on a 50 Mhz
- 68060 (but only the refresh speed is the same...).
-
- - It is bus' bandwidth indipendent: the refresh speed is the same for a
- Zorro2 installed board as for a Zorro3 (again, only the refresh speed).
-
- - Doesn't need Amiga's memory: both virtual and real display resides on
- the board's video memory.
-
-
- ...But gives also this disavantage:
-
- - Since both virtual and real display must reside in the video memory, a
- 2 Meg SD64 allows max a 640x400 24 bit display.
-
-
- *** Requirements:
-
- Besides a working Amiga and PiccoloSD64, you need a registered and
- correctly installed CyberGraphX and a recent version of ShapeShifter,
- whether registered or not.
-
-
- *** Features:
-
- At the moment SD64evd supports these screen modes:
-
- 512 x 384 x 24 bit
- 576 x 432 x 24 bit
- 640 x 400 x 24 bit
- 640 x 480 x 24 bit (only for 4 Meg SD64)
- 768 x 576 x 24 bit (only for 4 Meg SD64)
- 800 x 600 x 24 bit (only for 4 Meg SD64)
- 832 x 624 x 24 bit (only for 4 Meg SD64)
-
- The assembly source is included.
-
-
- ============================= Archive contents =============================
-
- Original Packed Ratio Date Time Name
- -------- ------- ----- --------- -------- -------------
- 2456 1410 42.5% 03-Jun-96 19:18:38 SD64evd
- 12809 3733 70.8% 03-Jun-96 20:52:42 SD64evd.asm
- 7584 3280 56.7% 03-Jun-96 21:20:58 SD64evd.doc
- 1540 936 39.2% 01-Jun-96 18:33:44 SD64evd_TEST
- 8219 2465 70.0% 01-Jun-96 23:20:08 SD64evd_TEST.asm
- 725 356 50.8% 31-May-96 13:26:46 SD64evd_TEST.doc
- -------- ------- ----- --------- --------
- 33333 12180 63.4% 05-Jun-96 05:15:48 6 files
-