Difference between revisions of "Keyboard"
From SpecNext official Wiki
| 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 | $**FE |
|---|---|
| Decimal | |
| Short desc. | Series of specific ports that read keyboard key presses. |
| Bit Mask | %xxxx xxxx ---- ---0 where only one bit in x is 0 |
| Readable | Yes |
| Writable | No |
| 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 |
