Extended Keys 1 Register

From SpecNext official Wiki
Revision as of 20:25, 21 September 2022 by Ped7g (talk | contribs) (fix to "1 if pressed" logic (opposite to ULA port 254))
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
Number $B1
Readable Yes
Writable No
Short Description Read Next keyboard compound keys separately

Available since core3.1.5.

Bit Description
7 1 if DELETE pressed
6 1 if EDIT pressed
5 1 if BREAK pressed
4 1 if INV VIDEO pressed
3 1 if TRUE VIDEO pressed
2 1 if GRAPH pressed
1 1 if CAPS LOCK pressed
0 1 if EXTEND pressed

ULA Control Register ($68) (104) bit 4 stops extended keys from making entries in the 8x5 matrix