mancuso@psuvax.UUCP (Pat Mancuso) (04/03/84)
The schematics came from BG Micro today, and it was well worth the wait.
They contain pages xeroxed from the xerox manual (ch 10) along with
some information for kit builders and six 10" x 15" schematic sheets.
All the vital information is here, so the $5 is well spent. The address
once again is:
BG Micro
PO Bx 280298
Dallas, TX 75228
(214) 271-5546
They apparently will not accept credit cards for the schematics, as they
asked us to send a check.
For those of you who can't wait, here are the vital connections for the board:
Video Output (J7)
pin name
1 NC
2 NC
3 Vertical Sync
4 Horizontal Sync
5 Video
6-10 GND
Serial IO (J4)
pin name
1 GND
2 TX data
3 RX data
4 RTS
5 CTS
6 DSR
7 GND
8 Carrier Detect
9-14 NC
15 TX Clock
16 NC
17 RX Clock
18-19 NC
20 DTR
Serial IO Jumper options for Channel A (J9)
J9
1 2
o o
o o
o o M RXD to pin3
o o T TXD to pin2
o o M TXD from pin2
o o T RXD from pin3
o o M CTS to pin5
o o T RTS to pin4
o o M RTS from pin4
o o T CTS from pin5
o o M DCD to pin8
o o T DTR to pin20
o o M DTR from pin20
o o T DCD from pin8
RX Clock to modem o o
RX Clock to SIO o o
RX Clock from modem to SIO o o
Clock to SIO with TX clock o o
Modem supplies SIO w/TX Cl o o
Clock to Modem with TX Cl o o
39 40
All entries marked with 'T' should be jumpered for use with a modem
All entries marked with 'M' should be jumpered for use with a terminal
Serial IO Connector (J3)
Pin name
1 GND
2 RX data
3 TX data
4 CTS
5 RTS
6 DSR
7 GND
8 Terminal Ready
9-19 NC
20 DCD
21-25 NC
Keyboard Connector (J2)
Pin name
1 B0
2 B1
3 B2
4 B4
5 B4
6 B5
7 B6
8 B7
9 Strobe
10-12 NC
13 +5
14-25 GND
Disk Drive Connector (J2)
Pin name
1 NC
2 8/5.25 select (GND=5.25",open=8")
3 NC
4 Index
5 Select 1
6 Select 2
7 Side
8 HDLD
9 Step in
10 Step
11 Write Data
12 Write
13 TRK 00
14 Write Protect
15 Read Data
16 Low Current
17 Ready
18 NC (use for +12 suggested)
19 +5
20-37 GND
The Power connections I used to get the board up without a disk are:
(J5)
Pin name
1 -12
2 +12
4 GND
8 +5
There is also a lot of information on the monitor that is supplied with
the board, and the character set for the video. Since this is fairly long
already, that will have to wait.
---
Overall there is a smell of fried onions. (fnord)
:+: Pat Mancuso
:+: Penn State University
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