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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)
the contents of each of the board's two M27128AZB chips to a *.hex* file, and then merging the *.hex* files with the following
This Paradise VGA board was manufactured in 1988 and sold by Western Digital Corporation as a **WDVGA PLUS 16**, Model No. 61-603023-02.
![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 --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)
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|
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|
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
to this Paradise WDC board, the ROM contents appear to be considerably different. However, appearances can be deceiving,
so a full disassembly and comparison will be made at a later date.
Although Compaq's early VGA boards also used a Paradise chipset and Inmos DAC, and have many physical similarities
to this WDC Paradise board, the ROMs claim different authorship. A full disassembly and comparison of the Compaq and
WDC boards will be made at a later date.
One thing we know already: the Paradise developers didn't know how to spell "compatible."