Commodore LCD Emulator

[hggh]

http://commodore-lcd.lgb.hu/jsemu/

[cbm-vic-20]

    10 FOR A = 0 TO 50
    20 B = SIN(A/4)
    30 C = 20 + 20 * B
    40 FOR D = 0 TO C
    50 PRINT " ";
    60 NEXT
    70 PRINT "*"
    80 NEXT

Careful of the keyboard emulation. Double quote is Shift-2, left paren is shift-8, right paren is shift-9, plus is |, etc.

[jandrese → cbm-vic-20]

I couldn't figure out how to generate a "=" so had to double click on the 5x6 spot on the table of 0s on the right.

The page could probably use a cheat sheet on the bottom explaining the keymap.

[microcolonel → cbm-vic-20]

Extra confusing since I'm on a native Dvorak keyboard.

[a_t48]

Why does pressing Ctrl+Alt+Shift turn the screen somewhat garbage?

[compiler-guy → a_t48]

That is the keyboard shortcut to switch the character set from text mode to graphics mode and back. What actually ends up happening is you switch the character set from the low set of PETSCII (ASCII's variant for pet computers) to the high set of PETSCII, which contains many graphic characters.