3Com Equity Series Computers Equity I+ - Manual (Page 2)

EQUITY I+
Connector Pin Assignments
Parallel Port Connector
PIN NO. SIGNAL NAME DIRECTION DESCRIPTION
1 -STROBE 0 Strobe
2 DATA 0 Bit 0
3 DATA 1 0 Data Bit 1
4 DATA 2 0 Data Bit 2
5 DATA 3 0 Data Bit 3
DATA 4 0 Data Bit 4
7 DATA 5 0 Data Bit 5
a
DATA 6 0 Data Bit 6
9 DATA 0 Data Bit 7
-Acknowledge
11 BUSY I
PE I Paper Empty
13 SLCT I Printer Selected
14 FD 0 Paper Feed
15 -ERROR I
16 0 -Initialize
17 0 -Select In
25 GND Ground
Serial Port Connector
PIN NO. SIGNAL NAME DIRECTION DESCRIPTION
1 NC connection
2 DATA 0 Transmitted Data
3 RECEIVED DATA I Received Data
4 REQUEST TO SEND 0 Request to send
5 CLEAR TO SEND I to send
6 DATA SET READY I Data Set Ready
SIGNAL Signal Ground
8 CARRIER DETECT I Carrier Detect
9-19 N C No
20 DATA READY 0 Data Transmit Ready
21 NC No connection
22 RING INDICATOR I Ring Indicator
23-25 NC No connection
Keyboard Connector
PIN NO. SIGNAL NAME DIRECTION DESCRIPTION
1 KBD CLK I/O Keyboard Clock
2 KBD DATA Keyboard Data
3 -KBD RESET 0 -Keyboard Reset
4 GND Ground
5
6 NC connection
Note. The CURRENT LOOP functions are not supported. Standard
Interfacehas its function described
Pin 9 : CURRENT LOOP RETURN
Pin 11: CURRENT LOOP DATA
Pin RECEIVE CURRENT LOOP DATA
EQI+ -2 12/12/88 Equity Series Computers
I/O Port Addresses
Address Function
DMA Controller
020 Interrupt Controller
040 Timer
060 Programmable Peripheral Interface
080 DMA Page Register
OAX NMI Mask Register
200 20F Game Control
210-217 Expansion Unit
21F Reserved
278 27F Parallel Printer Port 2
2DF Alternate Enhanced Graphics Adapter
(Adapter 0)
-2E3 Data Acquisition (Adapter 0)
-2FF Serial Port 2
Prototype Card
320 32F Hard Disk
348 357 DCA 3278
360 367 PC Network (low address)
368 36F PC Network (high address)
378 37F Parallel Printer Port 1
380 -38F Bisynchronous (BSC) 2
390 393 Cluster
3A0 3AF Bisynchronous (BSC) 1
-3BF Monochrome Display and Printer Adapter
3C0 -3CF Enhanced Graphics Adapter
Color Graphics Monitor Adapter
3F0 Floppy Disk Controller
Serial Port 1
RTC Address Register (write only)
1185 RTC Data Register