Screen Display Codes - Commodore 16 User Manual

I
I
register value 7) use the 7 as the second number after the SOUND
command—SOUND 1,7,30
Use the following formula to find the sound register values for frequen-
cies other than those in the table:
SOUND REGISTER VALUE – 1024 --(111860.781/FREOUENCY)
Both the table of sound register values and the above formula are for
NTSC televisions This is the television standard used throughout the
United States and all of Canada. If you are in a country where PAL is
the television standard, you should use the following formula to calcu-
late new sound register values for the entire table
SOUND REGISTER VALUE = 1024—(111840.45/FREQUENCY)
APPENDIX E
Screen Display Codes
The following chart lists all of the characters built into the Commodore
character sets It shows which numbers should be POKEd into screen
memory (locations 3072 to 4095) to get a desired character. (Remem-
ber to set color memory-2048 to 3071) Also shown is which char-
acter corresponds to a number PEEKed from the screen.
Two character sets are available, but only one set at a time. This means
that you cannot have characters from one set on the screen at the
same time you have characters from the other set displayed. The
sets are switched by holding down the
f!►1fQ!
and _0 keys
simultaneously.
From BASIC, PRINT CHR$(142) will switch to upper-casergraphicS
mode and PRINT CHR$(14) switches to upper: sower-case mode.
Any number on the chart may also be displayed in REVERSE The
reverse character code may be obtained by adding 128 to the
values shown
I
174
175