Atari PC Owner's Manual page 66

Internal Disk Drive
Tracks 40
Sector Size 512 bytes
Storage Capacity 360 kilobytes
Rotational Speed 300 RPM
Data Transfer 250 kilobytes/second
Rate
Step Rate
Less than 6 microseconds
Controller 765, support for supplied internal floppy disk drive
and two additional external floppy disk drives
Video Graphics Adapter
Monochrome display
Monitor Types
Color display
Enhanced display
Display Modes:
EGA Monitor: EGA
Screen resolution and colors: 640 pixels x 350 lines
x 16 selected colors from a palette of 64
Typical character cell size: 8 x 14 pixels
CGA Monitors: EGA, color
Screen resolution and colors: 640 pixels x 200 lines
in monochrome or 320 pixels x 200 lines x 4 colors
(automatically selected by applications program)
Typical character cell size: 8 x 8 pixels
MDA Monitors: EGA, monochrome
Screen resolution: 80 characters x 25 lines of text
Character cell size: 9 x 14 pixels
Monitors: EGA, monochrome
HGC
Screen resolution and colors: 720 pixels x 348 lines
in monochrome graphics mode or 80 characters x 25
lines in monochrome text mode
Typical character cell size: 9 x 14 pixels
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