Toshiba T3200 User Manual page 196

Pin I/O
Signal Name Description
Active high, indicates that memory access has
been completed. When it is low,it is used to cause
28
0
10RDY
wait states to be inserted into the memory access
cycles. It is high impedance when memory is not
selected.
29 GND Ground
30 0 COE
Active low, output enable for video planes
Active low enable for system address bits
31
0 ESA (6-13, 14) and LPSW multiplexed with memory
datal address bits (see above).
32
0
CCAS Active low, column address strobe
33
0
MIOSL
Active high, Memory or I/O selected. Controls
external data bus driver.
34
0
GRAPH
Active high, indicates that a graphics mode is
active; low indicates alphanumeric mode.
35 0
RAS Active low, row address strobe.
36 CWO Active low, write signal for video plane 0
37 CW1
Active low, write signal for video plane 1
38 CW2 Active low, write signal for video plane 2
39 CW3
Active low, write signal for video plane 3
40 I RESET
Active low, master reset supplied by external
power on circuitry.
41 I CLOCK 26.0 MHz max.
42 I READ
Active high while reading PEGA I/O port or video
memory.
43 GND Gound
44 Vcc
+5V
45 I 10SEL
Active low. I/O select indicates accessing any
PEGA I/O port.
46 I MEMSL
Active low. memory select indicates accessing
video memory.
47 Vcc
+ 5V
48
0
POHS Horizontal Sync Signal
49
0
POVS
Vertical Sync Signal (active low for monochrome
monitors and IBM Enhanced Color Display).
50 0 POSR Secondary Red Output
51
0
POSG Secondary green output or intensity
52 0 BLANK
Active high, Horizontal or Vertical blanking for
use with feature connector.
53
0 ATRSLN
Active low, Attribute/ shift load for use with
feature connector.
G-S