Toshiba T3200 User Manual page 174

D.3 SIGNAL DESCRIPTION ADN PIN ASSIGNMENT
TABLE D-l Pin Description
Pin
liD
Signal Name
Description
Each of SD7-SDO is system data bus.
For printer control, this signal is used;
- to output printer data.
1
liD
SDO
- to read pri nter status.
- to decode printer command.
For FDD control, it is used;
- to decode FDD control command.
System data bus bit
o.
2
liD
SD1 System data bus bit 1.
3 Vcc
+ 5v
4
liD SD2 System data bus bit 2
5
liD
SD3 System data bus bit 3
6 liD SD4 System data bus bit 4
7 liD SD5 System data bus bit 5
8 liD SD6 System data bus bit 6
9 liD SD7 System data bus bit 7
liD port select signal to the color graphics
10 0 CRTCS controller. This signal is active (low) when the liD
~ort
address is 3D*H. *=O-F
SA9-SAO is system address. They are used to
decode the liD port addresses such as;
11 I SA2 Printer/ FDDI Color Graphics port!
HDD port! RS232C
System address line bit 2.
12
I SA3
System address line bit 3.
13
I
SA4
System address line bit 4.
14 I SAS System address line bit 5.
15 GND Ground
16 I SA6 System address line bit 6.
17 I SA7 System address line bit 7.
18 I SA8 System address line bit 8.
19 I
SA9
System address line bit 9.
20 I SA1
System address line bit 1.
21
I
PDSOO
Write precompensation control.
This signal is fixed to low in this system.
22 0 DRQ2
DMA cycle request signal from the FDe.
This siqnal is active hiqh.
D-3