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cpm
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walnut-creek-CDROM
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KAYPRO
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KP-PORTS.IQF
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KP-PORTS.INF
Wrap
Text File
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2000-06-30
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3KB
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57 lines
KAYPRO II I/O PORTS 11 11 83
PORT# USE CONNECTOR
-------------------------------------------------------------------
04 SIO A DATA RS-232 (J4) DB-25
05 SIO B DATA KEYBOARD (J3) phone type
06 SIO A CONTROL RS-232 (J4) DB-25
01 bit 0-receive character available
02 bit 1-interupt pending (Channel A only)
04 bit 2-transmit buffer empty
08 *bit 3-DCD -Data Carrier Detect
10 *bit 4-sync/hunt
20 *bit 5-CTS -Clear to Send
40 *bit 6-transmit underrun/eom
80 *bit 7-break/abort
*"External/status interrupt" mode
07 SIO B CONTROL KEYBOARD (J3) phone type
08 GP/PIO A DATA CENTRONICS (J2) DB-36
09 GP/PIO A CONTROL CENTRONICS (J2) DB-36
0A GP/PIO B DATA NOT USED E7-E14
0B GP/PIO B CONTROL NOT USED E7-E14
......................................................................
DISK DRIVE CONTROLLER PORTS U82-1793/7
10 IN: STATUS; OUT: COMMAND
11 IN/OUT: TRACK
12 IN/OUT: SECTOR
13 IN/OUT: DATA
......................................................................
1C SYS/PIO A DATA SYSTEM BIT PORT
1D SYS/PIO A CONTROL
01 bit 0-disk drive A select(active low)
02 bit 1-disk drive B select(active low)
04 bit 2-not used (E40 solder pad)
08 bit 3-centronics ready flag( i.e. not busy)
10 bit 4-centronics data strobe(active low)
20 bit 5-double density enable(active low) E38 solder pad
40 bit 6-disk drive motors on (active low)
80 bit 7-memory bank select
1E SYS/PIO B DATA NOT USED(8 bits) E28-E35 solder pads
1F SYS/PIO B CONTROL NOT USED(8 bits) E28-E35 solder pads
.......................................................................
DB-25 PINOUT MNEMONIC DESCRIPTION
1 Grnd FRAME GROUND
(tied to signal and ground bus)
2 TxD TRANSMIT DATA
3 RxD RECEIVE DATA
4 RTS REQUEST TO SEND
5 CTS CLEAR TO SEND
6 DSR DATA SET READY
(tied to 5 volts at KPII)
7 SIGNAL GROUND
8 DCD DATA CARRIER DETECT
9 DTR DATA TERMINAL READY