Version 3.3 of the FR80 Displayers will shortly come into full service. The alterations that have been made to the standard displayers are as follows:
The GO command may have two parameters. The second will specify the number of filemarks to be read before the program halts. CONTINUE also has two parameters.
If both record and filemark counts are provided, the program will halt with FRAMES DONE whichever count exhausts first.
No frame advance is caused by the filemark. Hence, multi-tape jobs can be run without extra blank frames.
A new order: 236N00 allows the user to change vector speeds as follows:
N Speed (m secs) 0 8 1 4 2 2 3 1
This order is temporary so that the facility can be tried. It will change when the new displayer is available.
A new order: 22700+N allows the user to print, in octal, the contents of some of the FR80 internal variables onto the film, starting at the current location. Leading zeros are suppressed. The values of N, together with their meanings, are given below:
N (octal) Variable Printed 0 Cumulative frame count 1 Cumulative picture count 2 Tape mode (DATCOM) 3 Vector speed 4 Colour filter number 5 Character hits count 6 Vector hits count 7 Point hits count 10 Record number 11 File number 12 Current buffer pointer 13 Data word in buffer 14 Current buffer address 15 Pulldown 16 Camera number 17 Time (first of two) 20 Time (second of two) 21 Depth of picture nesting 22 Spot size 23 Intensity 24 Character size 25 Character rotation 26 Character space. 27 Line space 30 Address indicating vector mode 31 X offset 32 Y offset 33 IO general status 34 Magnetic tape status 35 Disc status
This order is temporary and is intended to assist debugging only.
A set of centralised characters has been defined to assist in character plotting:
Character code (octal) Character 340 - minus 341 * asterisk 342 + plus 343 . full stop 344 O letter O 345 X letter X
The following characters are no longer available: 240,241,242,252,253,261