Adapters and Displays
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Adapters and Displays
■ Scroll through the tables in this topic, which list the screen modes
available for each adapter. If the display device is also a factor in
choosing a screen mode, it is listed.
■ MDPA Screen Modes
• The IBM Monochrome Display and Printer Adapter (MDPA) must be used
with a monochrome display. Only Screen 0, text mode, can be used with
the MDPA.
Rows and Color Display
Mode Columns Attributes Colors Resolution Pages
════ ════════ ══════════ ═══════ ══════════ ═════════════
0 80x25 16 3 720x350 1
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■ Hercules Adapter Screen Modes
Rows and Color Display
Mode Columns Attributes Colors Resolution Pages
════ ════════ ══════════ ═══════ ══════════ ═════════════
0 80x25 16 3 720x348 1
3 80x25 16 1 720x348 2
───────────────────────────────────────────────────────────────────
■ CGA Screen Modes
• The IBM Color Graphics Adapter (CGA) and Color Display are typically
paired. This combination permits running text-mode programs, and both
medium-resolution and high-resolution graphics programs.
Rows and Color Display
Mode Columns Attributes Colors Pages
════ ════════ ══════════ ═══════ ══════════════════════════
0 40x25 16 320x200 8
0 80x25 16 640x200 4
1 40x25 4 320x200 1
2 80x25 2 640x200 1
───────────────────────────────────────────────────────────────────
■ EGA Screen Modes
• The IBM Enhanced Graphics Adapter (EGA) can be used with either the
IBM Color Display or the Enhanced Color Display. In modes 0, 1, 2,
7, and 8, these pairings produce similar results, except for the
following differences:
■ The border color cannot be set on an Enhanced Color Display
when it is in 640 x 350 text mode.
■ Text quality is better on the Enhanced Color Display (an 8 x 14
character box for Enhanced Color Display vs. an 8 x 8 character
box for Color Display).
• Mode 9 takes full advantage of the capabilities of the Enhanced Color
Display. Mode 9 provides for the highest resolution possible for the
EGA/Enhanced Color Display configuration. Programs written for this
mode will not work for any other hardware configuration except the
VGA.
• The following screen modes can be used with an EGA:
Rows and Color Display Page
Mode Columns Display(a) Attributes Colors Resolution Size Pages
════ ════════ ══════════ ══════════ ══════ ══════════ ════ ══════
0 40x25 C 16 16 320x200 N/A 8
40x25 E 16 64 320x350 N/A 8
40x43 E 16 64 320x350 N/A "(b)
80x25 C 16 16 640x200 N/A "(b)
80x25 E 16 64 640x350 N/A "(b)
80x25 C 16 16 640x200 N/A "(b)
80x25 M 16 3 720x350 N/A "(b)
80x43 E 16 64 640x350 N/A 4(b)
80x43 M 16 3 720x350 N/A 4(b)
1 40x25 N/A 4 16 320x200 16K 1
2 80x25 N/A 2 16 640x200 16K "
7 40x25 N/A 16 16 320x200 32K (c)
8 80x25 N/A 16 16 640x200 64K (c)
9(d) 80x25 E 4 64 640x350 64K 1
80x43 E 4 64 640x350 64K 1
80x25 E 16 64 640x350 128K (c)
80x43 E 16 64 640x350 128K (c)
10 80x25 M 4 9 640x350 64K (e)
80x43 M 4 9 640x350 64K (e)
────────────────────────────────────────────────────────────────────────
(a) C = Color display
E = Enhanced color display
M = Monochrome display
N/A = Not applicable (color display or enhanced color display)
(b) Pages = Screen memory divided by page size. Eight page maximum,
one page minimum.
(c) Pages = Screen memory divided by 2 divided by page size. Eight
page maximum, one page minimum.
(d) Number of pages is halved with 64K.
(e) The first two entries under mode 9 are for an EGA with 64K of screen
memory. The next two entries assume more than 64K of screen memory.
■ EGA and VGA Adapters with Monochrome Display: Screen 10
• Only the EGA and VGA can be paired with the IBM Monochrome display
to run programs in screen mode 10. This mode can be used to display
monochrome graphics at a very high resolution with the optional
effects of blinking and high intensity.
• The following two tables summarize the color attributes, display
colors, and effects for screen mode 10 used with a monochrome
display:
Color Attribute Default Effect
═══════════════ ════════════════════════════════════════════════
0 Off
1 On, normal intensity
2 Blink
3 On, high intensity
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Display Color Effect
═══════════════ ════════════════════════════════════════════════
0 Off
1 Blink, off to on
2 Blink, off to high intensity
3 Blink, on to off
4 On
5 Blink, on to high intensity
6 Blink, high intensity to off
7 Blink, high intensity to on
8 High intensity
───────────────────────────────────────────────────────────────────
■ VGA Screen Modes
• The IBM Video Graphics Array (VGA) adapter offers significantly enhanced
text and graphics in all modes:
Rows and Color Page
Mode Columns Attributes Colors Resolution Size Pages
════ ════════ ══════════ ══════ ══════════ ════ ══════════════════
0 40x25 16 64 360x400 8
40x43 16 64 320x350 8
40x50 16 64 320x400 4
80x25 16 64 720x400 8
80x43 16 64 640x350 4
80x43 16 3 720x350 4
80x50 16 64 640x400 4
80x50 16 3 720x400 4
1 40x25 4 16 320x200 16K 1
2 80x25 2 16 640x200 16K 1
7 40x25 16 16 320x200 32K (a)
8 80x25 16 16 640x200 64K (a)
9 80x25 16 64 640x350 128K (a)
80x43 16 64 640x350 128K (a)
10 80x25 4 9 640x350 64K (b)
80x43 4 9 640x350 64K (b)
11 80x30 2 256 640x480 64K 1
80x60 2 256 640x480 64K 1
12 80x30 16 256 640x480 256K 1
80x60 16 256 640x480 256K 1
13 40x25 256 256 320x200 64K 1
────────────────────────────────────────────────────────────────────────
(a) Pages = Screen memory divided by page size; 8-page maximum.
(b) Pages = Screen memory divided by 2 divided by page size; 8-page
maximum.
■ MCGA Screen Modes
• The IBM Multicolor Graphics Array (MCGA) combines the modes of the CGA
with the very high resolution and 256K color modes of the VGA to
provide enhanced text and graphics in all modes.
Rows/ Color Page
Mode Columns Attributes Colors Resolution Size Pages
════ ════════ ══════════ ══════ ══════════ ════ ═════════════
0 40x25 16 320x400 8
80x25 16 640x400 8
1 40x25 4 320x200 16K 1
2 80x25 2 640x200 16K 1
11 80x30 2 256K 640x480 64K 1
80x60 2 256K 640x480 64K 1
13 40x25 256 256K 320x200 64K 1
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See: ◄Color Attributes and Values (SCREEN)► ◄PALETTE Statement►
◄PALETTE USING Statement► ◄Screen Mode Summary►
◄SCREEN Statement►