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The
ACRTC Board |
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The following
short programs are written in Enhanced BASIC and illustrate some of the
hardware accelerated drawing capabilities of the Hitachi HD63484 Advanced CRT
Controller on the ACRTC Board. |
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Hardware
Requirements |
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Mega 68000 or
68030 Computer System with 1x free expansion slot |
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Standard VGA
monitor |
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* Plug the ACRTC
Board into the expansion slot |
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* Connect the VGA
monitor to the ACRTC Boards DE-15 interface |
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Software
Requirements |
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System ROM V2.05
introduces new BASIC keywords/commands designed to
simplify graphics programming in BASIC. The commands are: CLS, PSET (Pixel
Set), RECT (Rectangle), and CIRCLE. |
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The demo programs
below requiring System ROM V2.05 or later are written
specifically to take advantage of these new commands. If
you have System ROM V2.04 or earlier, it is recommended
that you upgrade. |
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Note: |
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The older demo's
are still available to download and do not require
System ROM V2.05 |
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ACRTC - Graphics Demo1 |
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The demo
below draws random lines, rectangles, circles, and dots. |
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1. |
Downloads: |
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2. |
Use a
text editor to open the downloaded file |
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3. |
Highlight and copy ALL the text within the file |
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4. |
Paste
the copied text into the SYS> window |
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The
program will download
and run |
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ACRTC - Graphics Demo2 |
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The demo
below draws a simple spiral pattern in the center of the
screen. |
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1. |
Downloads: |
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2. |
Use a
text editor to open the downloaded file |
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3. |
Highlight and copy ALL the text within the file |
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4. |
Paste
the copied text into the SYS> window |
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The
program will download
and run |
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ACRTC - Graphics Demo3 |
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In
September 1982 an article appeared in ANALOG
Computing Issue 7 featuring a graphics program
known as the Archimedes Spiral. This classic
80's program is well known for the ‘hat’ image it
produces. ACRTC Demo3 faithfully reproduces that 1982 image
in the center of the ACRTC screen. |
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1. |
Downloads: |
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2. |
Use a
text editor to open the downloaded file |
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3. |
Highlight and copy ALL the text within the file |
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4. |
Paste
the copied text into the SYS> window |
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The
program will download
and run |
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ACRTC - Graphics Demo4 |
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The demo
below draws a Barnsley fern in the center of the
screen. This computer generated image is a well known fractal named
after the british mathematician Michael Barnsley. |
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1. |
Downloads: |
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2. |
Use a
text editor to open the downloaded file |
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3. |
Highlight and copy ALL the text within the file |
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4. |
Paste
the copied text into the SYS> window |
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The
program will download
and run |
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Unable to
download? |
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Some internet browsers
may display the files contents rather
than download the file, if so use the following keyboard
shortcuts to select ALL the text in the browser window and copy
it to the Windows clipboard. |
| CTRL+A
(Select All) |
| CTRL+C
(Copy) |
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Using Windows
Notepad (or equivalent) create
a
new empty text document and paste the
copied text into the document using the following
shortcut. |
| CTRL+P
(Paste) |
| Now save the
document and to avoid confusion later name it
the same as the download name. |
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