nikola-wan
Veteran Member
During weeks of studying how my 4054A display worked so I could fix it - I ran across a Tektronix Tekniques Vol 5 No 3 article announcing the Option 31 Color Enhanced Dynamic Graphics Display. The article described three different colors: green for normal stored vectors, red for write-thru (or refresh) vectors and green-yellow for over-write of write-thru vector over a stored vector.
I created a BASIC program to see the third color and found I could get FIVE colors!
RED - write-thru of one Option 30 Dynamic Graphics coprocessor object each refresh period (37.5Hz)
ORANGE - write-thru of two Option 30 objects each refresh period (also a little brighter than RED objects)
LIME-GREEN - write-thru of one Option 30 object each refresh period - over-writing a stored object
YELLOW - write-thru of two Option 30 objects each refresh period - over-writing a stored object
GREEN - stored vectors
Here is my youtube video link: https://www.youtube.com/watch?v=rg31JF5iG08
I have attached my BASIC program. It uses my Vectrex joystick connected to my GPIB Flash Drive to turn on or off all the write-thru objects.
I created a BASIC program to see the third color and found I could get FIVE colors!
RED - write-thru of one Option 30 Dynamic Graphics coprocessor object each refresh period (37.5Hz)
ORANGE - write-thru of two Option 30 objects each refresh period (also a little brighter than RED objects)
LIME-GREEN - write-thru of one Option 30 object each refresh period - over-writing a stored object
YELLOW - write-thru of two Option 30 objects each refresh period - over-writing a stored object
GREEN - stored vectors
Here is my youtube video link: https://www.youtube.com/watch?v=rg31JF5iG08
I have attached my BASIC program. It uses my Vectrex joystick connected to my GPIB Flash Drive to turn on or off all the write-thru objects.