Toshiba T3200 User Manual page 188

F.3
SIGNAL DESCRIPTION AND PIN ASSIGNMENT
TABLE F-l Pin Description
Pin
I/O Signal Name Description
1 0
MUXB
Multiplex Select A
External Clock/ Dip switch select signal
2 0 MUXA
Multiplex Select B
External Clock/ Dip switch select signal
3 Vcc
+5V
4
0
RAMCS SRAM chiQselect signal
5 0 RAMWE SRAM write enable signal
6 I DMACK System bus address enable signal
7 I SMEMW Memory write command
8 I SMEMR Memory read command
9
I
lOW I/O write command
10 I
lOR I/O read commad
This signal is ued to power on the Auto-switch
11 I AUTOSW (DIP-SW1) concernig bit 70f the PEGA2 status
read port.
This signal is used to select double or single FONT
12 I FONT
(DIP-SW4) concernig bit 5 of the PEGA2 status
read
port.
13 I DSPDIS This signal is used to disable the system
This signal is used to select Sacandinavian or
14 I CGFONT Normal FONT (DIP-SW6) concernig bit 4 of the
PEGA2 status read port.
15 GND Ground
16 I REFRSH
System bus memory refresh signal. When this is
low, memory access is enabled.
17 I SWTCH
Status signal from the external4-bit Display type
select switch.
18 I RESET System bus reset signal
CRT interrupt signal. This signal is output from
19 I IRQ9 the PEGA2, and can be read at the bit 7 of 3C2
port.
20 I BLANK
This is the signal to indicate that blanking is
being executed.
21 I MIOSl This is the si9nal to select Memory or I/O.
22 I POVS CRT display signal from the PEGA2.
23 I POHS
CRT display signal from the PEGA2.
24 I POSB
CRT disglay signal from the PEGA2.
25 I POSG
CRT display signal from the PEGA2.
26 I POBl
CRT display signal from the PEGA2.
27 I POGR
CRT displav siqnal from the PEGA2.
F-3