Zenith Z-100 PC series Service Manual page 243

Chapter
1
Specifications
Video
Video RAM ........................... .
Color Selection ........................ .
Mode Selection ........................ .
ROM Font ............................ .
Bandwidth ............................. .
Output ................................ .
Sync ................................. .
Cursor Type ........................... .
Light Pen Interface ..................... .
Serial I/O
Communication Channel
Communication Element
Baud rates ............................ .
Word Length .......................... .
Parity ................................ .
Start Bits ............................. .
Stop Bits ............................. .
CPU Port Addressing ................... .
Software Programming .................. .
Floppy Disk Controller
Capacity .............................. .
Floppy Controller . . . . . . . . . . . . . . . . . . . . . . . .
CPU Port Addressing ................... .
Heads ................................ .
Encoding Format ....................... .
Motor Start Time ....................... .
Head Load Time ....................... .
Head Settle Time ...................... .
Stepping Time ......................... .
16KxB
Foreground, background, and border
Text mode, all points-addressable graphics
256 character
7 or 14 MHz, mode-dependent
Monochrome and/or color (RGBI)
External vertical, horizontal, and/or composite
with selectable polarity
Block, line, blinking, etc.
Provided with selectable polarity
Single DTE
Western Digital 8250 Asynchronous Communica­
tions Element (ACE)
50 to 19200
5,6,7, orB bit
Odd, even, or no parity
One
One or two
COM1 (03FBH-03FFH)
COM2 (02DO-02DF)
Full- or half-duplex
Two internal 5.25-inch double-sided double-den­
sitydisks
NEC f.l.PD765
03FOH-03F7H
Two
40 track, 8 or 9 sectors/track, 512 bytes/sector,
double density, Modified Frequency Modula ­
tion (MFM)
500ms
35ms
25ms
6 ms track to track