Semantic search
Number | Readable | Writable | Description | |
---|---|---|---|---|
Palette Value Register | $41 | true | true | Use to set/read 8-bit colours of the ULANext palette. |
Enhanced ULA Ink Color Mask | $42 | true | true | Specifies mask to extract ink colour from attribute cell value in ULANext mode. |
Enhanced ULA Control Register | $43 | true | true | Enables or disables Enhanced ULA interpretation of attribute values and toggles active palette. |
Enhanced ULA Palette Extension | $44 | true | true | Use to set 9-bit (2-byte) colours of the Enhanced ULA palette, or to read second byte of colour. |
Transparency colour fallback Register | $4A | true | true | 8-bit colour to be used when all layers contain transparent pixel. |
Sprites Transparency Index Register | $4B | true | true | Index into sprite palette (of "transparent" colour). |
Tilemap Transparency Index Register | $4C | true | true | Index into Tilemap palette (of "transparent" colour). |
Memory management slot 0 bank | $50 | true | true | Selects the 8k-bank stored in 8k-slot 0 (see Memory map). |
Memory management slot 1 bank | $51 | true | true | Selects the 8k-bank stored in 8k-slot 1 (see Memory map). |
Memory management slot 2 bank | $52 | true | true | Selects the 8k-bank stored in 8k-slot 2 (see Memory map). |
Memory management slot 3 bank | $53 | true | true | Selects the 8k-bank stored in 8k-slot 3 (see Memory map). |
Memory management slot 4 bank | $54 | true | true | Selects the 8k-bank stored in 8k-slot 4 (see Memory map). |
Memory management slot 5 bank | $55 | true | true | Selects the 8k-bank stored in 8k-slot 5 (see Memory map). |
Memory management slot 6 bank | $56 | true | true | Selects the 8k-bank stored in 8k-slot 6 (see Memory map). |
Memory management slot 7 bank | $57 | true | true | Selects the 8k-bank stored in 8k-slot 7 (see Memory map). |
Copper Data | $60 | false | true | Used to upload code to the Copper. |
Copper Control Low Byte | $61 | true | true | Holds low byte of Copper control bits. |
Copper Control High Byte | $62 | true | true | Holds high byte of Copper control flags. |
Copper Data 16-bit Write Register | $63 | false | true | Used to upload code to the Copper. |
Vertical Video Line Offset Register | $64 | true | true | Offset numbering of raster lines in copper/interrupt/active register |