Vector 4 - Page 195

VECTOR GRAPHIC, INC.
V 4-6
SIGNAL
WR2
WR3
CASf# (even mem)
CAS1 (odd mem)
CAS?2
CAS3
ROMSEL
4C/8C
ROMENBL
ALPH/GRAPH
DIG/GRY
320/160
CHR#/CHR1
TRDY
TONE GEN
P@g1
P#23
P§45
P@67
P@89
PJAB
LOCATION
U49-3
U49-6
U46-11
U46-8
U46-3
U46-6
U6-8
U74-11
U93-2
U93-5
U93-9
U93-16
U93-19
U94-4
U94-T
U55-15
U55-14
U55-13
U55-12
U55-11
U55-10
7200-0001
DESCRIPTION
Active only in 256K systems
Active only in 256K systems
Active high for video cycle
Active high for video cycle
Active only in 256K systems
Active only in 256K systems
Low when accessing PROM
Actuve during use of 4 or 8 color
graphies
Low when ROM is enabled
Low for alphanumeric mode, high
for graphics mode
Pulsating active
Pulsating
Pulsating active
High when speaker active
Active when generating sound
Active when low for keyboard chip
select
Active low for clock of U93
Active low; used as chip select for
DCE (U121)
Active low; used as chip select for
DTE (U122)
Active low; used as chip select for
8255 (U95)
Active low; used as chip select for
8255 (U95)
09-01-82