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Updated README for Paradise WDVGA PLUS 16 board

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Jeff Parsons 2015-04-30 16:59:41 -07:00 • committed by jeffpar
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devices/pc/video/paradise/vga/README.md
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Paradise VGA Board (Western Digital Corporation, 1988) Paradise VGA Board: WDVGA PLUS 16
--- ---
A copy of this board's [ROM BIOS](1988-05-23.json) was created by [dumping](/devices/pc/bios/compaq/deskpro386/#reading-the-roms) This Paradise VGA board was manufactured in 1988 and sold by Western Digital Corporation as a **WDVGA PLUS 16**, Model No. 61-603023-02.
the contents of each of the board's two M27128AZB chips to a *.hex* file, and then merging the *.hex* files with the following
![Paradise VGA Board](/devices/pc/video/paradise/vga/static/Paradise_VGA_1988-640.jpg "link:/devices/pc/video/paradise/vga/static/Paradise_VGA_1988.jpg")
A copy of the board's [ROM BIOS](1988-05-23.json) was created by [dumping](/devices/pc/bios/compaq/deskpro386/#reading-the-roms)
the contents of each of the board's two M27128AZB PROMs to a *.hex* file, and then merging the *.hex* files with the following
[FileDump](/modules/filedump/) command: [FileDump](/modules/filedump/) command:
filedump --file=62-003084-060.hex --merge=62-003085-060.hex --output=1988-05-23.json filedump --file=62-003084-060.hex --merge=62-003085-060.hex --output=1988-05-23.json
@ -14,7 +18,7 @@ And for those who want a binary file, the FileDump API can be used to recreate b
> [http://www.pcjs.org/api/v1/dump?file=http://www.pcjs.org/devices/pc/video/paradise/vga/1988-05-23.json&format=rom](http://www.pcjs.org/api/v1/dump?file=http://www.pcjs.org/devices/pc/video/paradise/vga/1988-05-23.json&format=rom) > [http://www.pcjs.org/api/v1/dump?file=http://www.pcjs.org/devices/pc/video/paradise/vga/1988-05-23.json&format=rom](http://www.pcjs.org/api/v1/dump?file=http://www.pcjs.org/devices/pc/video/paradise/vga/1988-05-23.json&format=rom)
The ROM BIOS begins with the following data: The first 128 bytes of the ROM BIOS contain:
00000000 55 aa 30 eb 15 37 34 30 30 30 35 2f 32 33 2f 38 |U.0..740005/23/8| 00000000 55 aa 30 eb 15 37 34 30 30 30 35 2f 32 33 2f 38 |U.0..740005/23/8|
00000010 38 2d 31 38 3a 30 30 3a 30 30 e9 a8 00 00 49 42 |8-18:00:00....IB| 00000010 38 2d 31 38 3a 30 30 3a 30 30 e9 a8 00 00 49 42 |8-18:00:00....IB|
@ -25,6 +29,8 @@ The ROM BIOS begins with the following data:
00000060 39 38 37 2c 31 39 38 38 2c 20 41 4c 4c 20 52 49 |987,1988, ALL RI| 00000060 39 38 37 2c 31 39 38 38 2c 20 41 4c 4c 20 52 49 |987,1988, ALL RI|
00000070 47 48 54 53 20 52 45 53 45 52 56 45 44 56 47 41 |GHTS RESERVEDVGA| 00000070 47 48 54 53 20 52 45 53 45 52 56 45 44 56 47 41 |GHTS RESERVEDVGA|
Even though Compaq's early VGA boards also used a Paradise chipset and Inmos DAC, and have many physical similarities Although Compaq's early VGA boards also used a Paradise chipset and Inmos DAC, and have many physical similarities
to this Paradise WDC board, the ROM contents appear to be considerably different. However, appearances can be deceiving, to this WDC Paradise board, the ROMs claim different authorship. A full disassembly and comparison of the Compaq and
so a full disassembly and comparison will be made at a later date. WDC boards will be made at a later date.
One thing we know already: the Paradise developers didn't know how to spell "compatible."