Display List Instructions#

There are 3 kinds of instructions

• $x0 blank lines
• $x1 jumps
• $x2-$xF display lines, divided into
  • $x2-$x7 text lines
  • $x8-$xF pixel/map/graphics lines

Instructions for Blank lines#

Instruction dec	Instruction hex	BASIC Mode	Scan lines	Pixel per line	Bytes per line	Comment
0	$00	na	1	0	0	1 blank line
16	$10	na	2	0	0	2 blank lines
32	$20	na	3	0	0	3 blank lines
48	$30	na	4	0	0	4 blank lines
64	$40	na	5	0	0	5 blank lines
80	$50	na	6	0	0	6 blank lines
96	$60	na	7	0	0	7 blank lines
112	$70	na	8	0	0	8 blank lines

Jump Instructions#

Instruction dec	Instruction hex	BASIC Mode	Scan lines	Pixel per line	Bytes per line	Comment
1	$01	na	0	0	0	jump to address, instruction followed by address (2 byte in LSB,MSB order)
65	$41	na	0	0	0	jump to address and wait for VBI, instruction followed by address (2 byte in LSB,MSB order)

Instructions for Text Lines#

Instruction dec	Instruction hex	BASIC Mode	Scan lines	VSCROL max	Pixel per line	Bytes per line	Comment
2	$02	0	8	7	40	40	Text mode 0, normal text, 24 rows
3	$03	na	10	9	40	40	text with full size descenders (e.g. g,p,y,j,q)
4	$04	12 XL/XE OS only	8	7	40	40	4-color-characters, 4 pixel width, 24 rows
5	$05	13 XL/XE OS only	16	15	40	40	4-color-characters, 4 pixel width, double heigth, 12 rows
6	$06	1	8	7	20	20	Text mode 1, double width text, 24 rows
7	$07	2	16	15	20	20	Text mode 2, double width and height text, 12 rows

Instructions for Pixel/Graphics Lines#

Instruction dec	Instruction hex	BASIC Mode	Scan lines	VSCROL max	Pixel per line	Bytes per line	Comment
8	$08	3	8	7	40	10	Graphics Mode 3, 24 rows
9	$09	4	4	3	80	10	Graphics Mode 4, 48 rows
10	$0A	5	4	3	80	20	Graphics Mode 5, 48 rows
11	$0B	6	2	1	160	20	Graphics Mode 6, 96 rows
12	$0C	14 XL/XE OS only	1	0	160	20	Graphics Mode 14, 192 rows
13	$0D	7	2	1	160	40	Graphics Mode 7, 96 rows
14	$0E	15 XL/XE OS only	1	0	160	40	Graphics Mode 15, 192 rows
15	$0F	8	1	0	320	40	Graphics Mode 8, 192 rows

Added functions#

To activate special functions in a display line, add the value as stated below

Function	add decimal	add hex	bit	comment
enable Horizontal Scrolling	16	$10	4	see HSCROL, possible for text and pixel lines
enable Vertical Scrolling	32	$20	5	see VSCROL, possible for text and pixel lines
Load memory scan	64	$40	6	instruction followed by address (2 byte in LSB,MSB order), possible for text and pixel lines. The screen memory can NOT cross a 4K boundary. If screen memory is bigger than 4K, the display list must contain at least 2 LMS commands.
enable Display List Interrupt	128	$80	7	see VDSLST, possible for blank, text and pixel lines

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see also: Display List Topics, VDSLST, VSCROL, HSCROL, 4-color-characters, Table of Modes and Screen Format