Difference between revisions of "MODE 11"
(Created page with "Category:Display right|Demonstration of 'MODE 11' (BBC) '''MODE 11''' is the unofficial title of a high-resolution screen [[MODE]...") |
|||
| Line 62: | Line 62: | ||
|- style="vertical-align:top" | |- style="vertical-align:top" | ||
| Video ULA palette register file | | Video ULA palette register file | ||
| − | | &07 &17 &26 &36 | + | | &07 &17 &26 &36 &47 &57 &66 &76<br> &84 &94 &A0 &B0 &C4 &D4 &E0 &F0 |
|- style="vertical-align:top" | |- style="vertical-align:top" | ||
| [[CRTC]] register file | | [[CRTC]] register file | ||
| − | | &3F &28 &31 &24 | + | | &3F &28 &31 &24 &26 &00<br> &20 &22 &01 &07 &67 &08 |
|} | |} | ||
| Line 96: | Line 96: | ||
==References== | ==References== | ||
<references/> | <references/> | ||
| − | + | {{MODE}} | |
| − | |||
[[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 17:17, 12 October 2016 (UTC) | [[User:Jgharston|Jgharston]] ([[User talk:Jgharston|talk]]) 17:17, 12 October 2016 (UTC) | ||
Revision as of 19:55, 12 October 2016
_demonstration.gif)
MODE 11 is the unofficial title of a high-resolution screen MODE, selectable with the *MODE command or the NewModes sideways ROM module.[1]
The MODE 11 code adapts the MODE 3 screen to provide a 4-colour version of MODE 1, 80 × 25 characters in 4 colours. It does this by redefining the character set to provide thin characters.
| Type | Bitmapped | |
| Resolution | Text | 80 × 25 characters |
| Graphics | text only | |
| Character size | 4 × 8 pixels | |
| Pixel aspect | 1:2 (tall) | |
| Bits per pixel | 2 | |
| Default palette | Logical colour | Actual colour |
|---|---|---|
| 0 | 0 (black) | |
| 1 | 1 (red) | |
| 2 | 3 (yellow) | |
| 3 | 7 (white) | |
| Memory | allocated | 16384 bytes |
| on screen | 16000 bytes | |
| Address range | Model B etc. | &4000..&7FFF |
| Configuration | Video ULA control register | &98 |
| 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 11 can be created manually with the following code running in the I/O processor.
BASIC: MODE 3 :REM Base MODE ?&30A=79 :REM Characters per line ?&34F=8 :REM Bytes per character ?&360=3 :REM Number of colours VDU 20 :REM Reset palette *FX154,132 6502: LDA #22:JSR OSWRCH LDA #03: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 |
