Difference between revisions of "83Plus:BCALLs:4972"
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| − | + | [[Category:83Plus:BCALLs:By_Name:Input|GetKey]] [[Category:83Plus:BCALLs:By_Name|GetKey]] [[Category:83Plus:BCALLs:By_Address|4972 - GetKey]] | |
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== Synopsis == | == Synopsis == | ||
| − | '''Official Name:''' | + | '''Official Name:''' GetKey |
| − | '''BCALL Address:''' | + | '''BCALL Address:''' 4972h |
| − | + | ||
| − | + | The standard key input routine. | |
=== Inputs === | === Inputs === | ||
| − | * [[83Plus: | + | * bit [[83Plus:Flags:24#Bit_3|lwrCaseActive, (iy+appLwrCaseFlag)]] set to enable lowercase entry |
| − | * | + | * bit [[83Plus:Flags:28#Bit_7|7, (iy+28h)]] set to disable the usual action of 2nd+Off |
| − | * | + | * [[83Plus:Flags:12|(iy+shiftFlags)]] contains shift settings |
=== Outputs === | === Outputs === | ||
| − | * | + | * A = keycode |
| − | * | + | * [[83Plus:RAM:8446|(keyExtend)]] = extended keycode |
| + | * bit [[83Plus:Flags:09#Bit_4|onInterrupt, (iy+onFlags)]] set (and A=0) if the On key was pressed | ||
| + | * [[83Plus:Flags:12|(iy+shiftFlags)]] contains shift settings | ||
=== Destroys === | === Destroys === | ||
| − | * | + | * DE, HL |
| + | * B, in some cases (mostly when some ''2nd'' key combination is pressed; needs further testing to determine the exact circumstances) | ||
== Comments == | == Comments == | ||
| − | This | + | This routine will wait for a key to be pressed and return it. It will handle the 2nd and Alpha keys, and the values it returns reflect this distinction. |
| + | |||
| + | It transparently handles the screen capture and remote control link commands, as well as (on OS 1.15 and higher) the TI-Keyboard. Other silent link commands will cause it to exit from the current app so that data can be transferred. It also handles 2nd+Off, 2nd+Up, and 2nd+Down in the expected ways. | ||
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| + | See also [[83Plus:BCALLs:500B|GetKeyRetOff]]. | ||
== Example == | == Example == | ||
| − | + | <nowiki> B_CALL GetKey | |
| − | + | cp kPi | |
| − | + | call z,Moo</nowiki> | |
| − | + | ||
Latest revision as of 15:23, 25 November 2020
Synopsis
Official Name: GetKey
BCALL Address: 4972h
The standard key input routine.
Inputs
- bit lwrCaseActive, (iy+appLwrCaseFlag) set to enable lowercase entry
- bit 7, (iy+28h) set to disable the usual action of 2nd+Off
- (iy+shiftFlags) contains shift settings
Outputs
- A = keycode
- (keyExtend) = extended keycode
- bit onInterrupt, (iy+onFlags) set (and A=0) if the On key was pressed
- (iy+shiftFlags) contains shift settings
Destroys
- DE, HL
- B, in some cases (mostly when some 2nd key combination is pressed; needs further testing to determine the exact circumstances)
Comments
This routine will wait for a key to be pressed and return it. It will handle the 2nd and Alpha keys, and the values it returns reflect this distinction.
It transparently handles the screen capture and remote control link commands, as well as (on OS 1.15 and higher) the TI-Keyboard. Other silent link commands will cause it to exit from the current app so that data can be transferred. It also handles 2nd+Off, 2nd+Up, and 2nd+Down in the expected ways.
See also GetKeyRetOff.
Example
B_CALL GetKey cp kPi call z,Moo
