Difference between revisions of "MODE 14"
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The MODE 14 code adapts the [[MODE 6]] screen to provide a 4-colour version | The MODE 14 code adapts the [[MODE 6]] screen to provide a 4-colour version | ||
| − | of MODE 6, 40 × | + | of MODE 6, 40 × 25 characters in 4 colours. It does this by redefining |
the character set to provide thin characters. | the character set to provide thin characters. | ||
| Line 16: | Line 16: | ||
| rowspan="2" | Resolution | | rowspan="2" | Resolution | ||
| Text | | Text | ||
| − | | 40 × | + | | 40 × 25 characters |
|- style="vertical-align:top" | |- style="vertical-align:top" | ||
| Graphics | | Graphics | ||
| − | | | + | | text only |
|- style="vertical-align:top" | |- style="vertical-align:top" | ||
| Character size | | Character size | ||
Revision as of 23:15, 16 October 2016
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MODE 14 is the unofficial title of a low-resolution screen MODE, selectable with the *MODE command or the NewModes sideways ROM module.[1]
The MODE 14 code adapts the MODE 6 screen to provide a 4-colour version of MODE 6, 40 × 25 characters in 4 colours. It does this by redefining the character set to provide thin characters.
| Type | Bitmapped | |
| Resolution | Text | 40 × 25 characters |
| Graphics | text only | |
| Character size | 4 × 8 pixels | |
| Pixel aspect | 1:1 (square) | |
| Bits per pixel | 2 | |
| Default palette | Logical colour | Actual colour |
|---|---|---|
| 0 | 0 (black) | |
| 1 | 1 (red) | |
| 2 | 3 (yellow) | |
| 3 | 7 (white) | |
| Memory | allocated | 8192 bytes |
| on screen | 8000 bytes | |
| Address range | Model B etc. | &6000..&7FFF |
| Configuration | Video ULA control register | &44 |
| Video ULA palette register file | &07 &17 &26 &36 &47 &57 &66 &76 &84 &94 &A0 &B0 &C4 &D4 &E0 &F0 | |
| CRTC register file | &3F &28 &31 &24 &26 &00 &20 &22 &01 &07 &67 &08 | |
MODE 14 can be created manually with the following code running in the I/O processor.
BASIC: MODE 6 :REM Base MODE ?&30A=39 :REM Characters per line ?&34F=8 :REM Bytes per character ?&360=3 :REM Number of colours VDU 20 :REM Reset palette *FX154,68 6502: LDA #22:JSR OSWRCH LDA #05:JSR OSWRCH \ Base MODE LDA #&27:STA &30A \ Characters per line LDA #&08:STA &34F \ Byte per character LDA #&03:STA &360 \ Number of colours LDA #20:JSR OSWRCH \ Reset palette LDA #154:LDX #84:JSR OSBYTE \ Cursor width
The character set needs to be redefined to be four pixels wide, such as with the one used with NewModes.
See Also
References
| Screen display MODEs |
|---|
|
MODE 0 | MODE 1 | MODE 2 | MODE 3 | MODE 4 | MODE 5 | MODE 6 | MODE 7 |
