24 lines
1.9 KiB
Markdown
24 lines
1.9 KiB
Markdown
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# Default keymap for m122-3270
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This keymap is intended to make the PC/3270 122-key IBM keyboard work as closely as possible to the standard
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PC/3270 keyboard's original mapping. Two layers are defined: layer 0 is the PC layout, using the blue legends
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on the PC/3270 keys (as shipped by Unicomp; I don't have the original keycaps, and I know there are a few
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differences), while layer 1 is the 3270 layout, with keycodes selected to make the x3270 suite do the right
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thing with each key as pressed. The idea here is, eventually, to get x3270 and friends to automatically
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shift the keyboard to layer 1 when they gain focus.
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When layer 0 is active, the PA1 key is Escape, the Reset and Enter keys are Control, and the comma and dot keys
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act like normal PC keys (< and >, repectively, when shifted). The Ctrl key (bottom right of the left-side 10-key
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cluster) is always the left GUI key. PA2 and Jump/PA3 are PgUp and PgDn, respectively, and the backtab key is
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End. The Rule/Home key is Home.
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When layer 1 is active, the keys do their labeled functions. The only keys that don't do anything are CrSel,
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ExSel, and Jump, though only a few of the alternate functions (on the front of the keys) work: left/right/delete
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word and PA3. The rest aren't emulated by x3270. Many of the keys that have function in PC mode will *not* have
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that same function in 3270 mode, since x3270 uses different keystrokes to accomplish the same function.
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To manually switch to layer 1, hold the Zoom key (the one on the far lower left of the keyboard) and press Clear
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(the one at the top right of that same block of 10 keys); to switch back to layer 0, hold the Zoom key and hit
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Attn (the one at the top left of that block of 10). Holding the Zoom key and the spacebar gets you to keys that
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control QMK itself: Zoom-space-R resets to the bootloader, Zoom-space-E erases the EEPROM (which currently does
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nothing), and Zoom-space-D turns the debugger on and off.
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