Keyboard: Difference between revisions
From SpecNext Wiki
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
|Writable=No | |Writable=No | ||
|Subsystem=Input | |Subsystem=Input | ||
|PortMask=% | |PortMask=%xxxx xxxx ---- ---0 where only one bit in x is 0 | ||
}} | }} | ||
Reads keys on the keyboard depending on the upper byte of the port number. | Reads keys on the keyboard depending on the upper byte of the port number. | ||
Revision as of 16:48, 28 August 2017
| Number | PortNumber::$**FE |
|---|---|
| Decimal | NumberDec:: |
| Short desc. | ShortDesc::Series of specific ports that read keyboard key presses. |
| Bit Mask | PortMask::%xxxx xxxx ---- ---0 where only one bit in x is 0 |
| Readable | Readable::Yes |
| Writable | Writable::No |
| Subsystem | Subsystem::Input |
Reads keys on the keyboard depending on the upper byte of the port number.
| Port upper byte | Keys affected |
|---|---|
| $7F | B, N, M, Symbol Shift, Space |
| $BF | H, K, J, L, Enter |
| $DF | Y, U, I, O P |
| $EF | 6, 7, 8, 9, 0 |
| $F7 | 5, 4, 3, 2, 1 |
| $FB | T, R, E, W, Q |
| $FD | G, F, D, S, A |
| $FE | V, C, X, Z, Caps Shift |
