57 lines
3.3 KiB
Plaintext
57 lines
3.3 KiB
Plaintext
=== Keyboard
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The EPPLE ][ emulates the original Apple ][ keyboard. The original Apple ][
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keyboard had symbols in different places than current common PC keyboards. For
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example, Shift-2 on the Apple ][ produces a double quote, but on a PC keyboard
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it produces an at-sign. For ease of typing, the EPPLE ][ emulator does not
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mimic the positions of the original keys, but rather mimics the symbols on
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the current PC keyboard. So, for example, if you type Shift-2 on the PC
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keyboard into the EPPLE ][, it produces an at-sign, as you would normally expect.
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The Apple ][ keyboard didn't produce lower-case letters; neither does the emulator.
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Also, the Apple couldn't produce an opening square bracket ([), braces, vertical
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bar, backslash. There were no up- or down-arrow keys. You cannot type these into
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the emulator, either. There are other, unusual, cases that are emulated correctly,
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as well, such as typing Control in conjunction with a number key simply produces
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that number. So typing a Control-3 is the same as just typing a 3. Also, typing
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Shift-Control-2 produces the NUL character (ASCII $80).
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The Apple ][ keyboards didn't automatically repeat typing characters when a
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key was held down. Instead, the user would hold down the REPT (``repeat'') key
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while holding down the key that was to be repeated. On the EPPLE ][, this
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behavior is emulated, and the F10 key is used as the REPT key.
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The Apple ][ had no keyboard buffer (actually, it had a buffer of one character).
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So if you typed several characters on the keyboard before the currently running
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program had a chance to read them, they would get lost (only the final character
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typed would be remembered). This behavior can be
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toggled on or off in the EPPLE ][. By default, the EPPLE ][ will buffer up any
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characters you type and deliver them to the emulated machine when it asks for
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them. However, the Apple program must be written properly to allow this to work.
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Some Apple ][ programs (like maybe some games) may not work correctly in this
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respect, so you may want to turn off buffering in these cases. With buffering
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turned off, the EPPLE ][ accurately emulates the original Apple ][. Use the F12
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key to toggle the keyboard buffering. Note that pasting from the clipboard (with
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the Insert key) will most definitely cause keys to be lost if the keyboard
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buffer is turned off. So if you have a big Applesoft program in the clipboard
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and you want to paste it into the EPPLE ][ correctly, make sure the keyboard
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buffer is on.
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.Special Keys
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* +F1+ Emulates the POWER switch on the back of the Apple ][.
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* +F2+ Cycles among different display types (TV, monitor, etc.).
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* +F3+ Toggles between full-screen or window display.
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* +F4+ Toggles between showing scan lines on the display, or duplicating
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each scan line to the following line, to fill-in the otherwise black line.
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* +F5+ Go to ``command entry'' mode.
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* +F6+ Emulates the RESET key.
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* +F7+ Pastes characters from the clipboard into the emulated Apple
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(as if they had been typed on the keyboard).
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* +F8+ Save a bitmap file of the current EPPLE ][ screen.
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The file will be in the default directory, named +ep2_YYYYMMDDHHMMSS.bmp+.
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* +F9+ Quit the EPPLE ][ program, immediately!
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* +F10+ Emulates the REPT key.
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* +F11+ Toggles between running the emulator at authentic speed
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(1.02 MHz CPU), or as fast as possible.
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* +F12+ Toggles the keyboard buffer.
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