The terminal interface can interrupt the 68000 CPU on level 4. The interrupt vector
used is auto-interrupt vector (# 28/$000070); this cannot be changed. A diagram showing
the terminal interface is given below as an example to illustrate the use of the 6850 de-
vice. More detailed board and configuration information is provided in Chapter 4.
Figure 6 Terminal Interface
The interface is enabled in Transparent Mode by activating the RTST line.
6850
IRQP4
D8
D9
D10
D11
D12
D13
D14
D15
A11
A7
+5V
CS6800
E
R/W*
7
22
21
20
19
18
17
16
15
11
8
10
9
14
13
6
2
5
24
23
4
3
TXD
RXD
RTS*
CTS*
DC0*
TXC
RXC
BR34
TINP1
4
5
6
17
16
15
2
3
1
BR15
Connector
P4
20
19
7
14
18
13
12
11
8
9
10
-12V
+12V
+5V
Control Bus
TRXDI
RTST
RTST
IRQ
D0
D1
D2
D3
D4
D5
D6
D7
RS
CS0
CS1
CS2*
E
R
3
2
4
1
7
9
20
5
6
8
TRXDO
-12V
Jumper
LK56
LK58
LK57
Connector P2
C25
C26
A28
PME68-1B Manual
Page 19 Issue 5
Содержание PME 68-1B
Страница 8: ...Figure 1 The PME 68 1B Board Photograph not available in PDF PME 68 1B Manual Page 2 Issue 5...
Страница 12: ...Figure 4 Component Layout Diagram P5 P4 P3 BAT PME 68 1B Manual Page 6 Issue 5...
Страница 56: ...Figure 14 Link Areas BAT PME68 1B Manual Page 50 Issue 5...
Страница 57: ...Blank Page PME68 1B Manual Page 51 Issue 5...
Страница 59: ...Figure 15 Location of System EPROM Area 1 2 3 4 1 2 3 4 WC1 WC2 PME68 1B Manual Page 53 Issue 5...
Страница 80: ...Figure 41 Location of BERR Jumpers 1 2 3 4 WK1 WK2 BR26 2 3 1 BAT PME68 1B Manual Page 74 Issue 5...
Страница 132: ...Blank Page PME68 1B Manual Page 126 Issue 5...