Radio Shack TRS-80 Operation Manual page 161

Computer Graphics Operation Manual
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2. "Fine" horizontal lines
CHR$(&HFF)+CHR$(&H~~)
Hex Decimal
255
~
3. "Medium" horizontal lines
CHR$(&HFF)+CHR$(&HFF)+CHR$(&H~~)+CHR$(&H~~)
1 1 1
1 1 1 1 1
1
1 1 1 1 1
1 1
~ ~
~ ~
~ ~ ~ ~
~
~ ~ ~ ~ ~ ~
~
Hex Decimal
FF
255
FF 255
~~ ~
~~ ~
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