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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include "iis.h"
include "../lib/ids.h"
define LEN_RANGE 1
# IISRANGE -- Read and write range scaling registers
# Input data is of form 1-->range "0", 2,3 --> "1", 4-7 --> "2"
# and anything beyond 7 --> "4". This is just like zoom.
# However, on readback, the actual range values are returned. If
# this should change, the zsnapinit code must change too (the only
# place where a range read is done).
procedure iisrange (rw, color, n, data)
short rw # read or write
short color[ARB] # color
short n # number of data values
short data[ARB] # the data
short range
int i, j
int command, x, itemp, ival
int and(), or()
include "iis.com"
begin
if (data[1] == IDS_EOD)
return
command = IREAD
x = ADVXONTC
call iishdr (command, LEN_RANGE, OFM+COMMAND, x, 0, 0, 0)
call iisio (range, LEN_RANGE * SZB_CHAR)
if (rw == IDS_WRITE) {
command = IWRITE+VRETRACE
j = 1
for (i=1; color[i] != IDS_EOD; i=i+1) {
switch (data[j]) {
case 1,2:
ival = data[j]-1
case 3:
ival = 1
case 4,5,6,7:
ival = 2
default:
if (ival < 0)
ival = 0
else
ival = 3
}
itemp = range
switch(color[i]) {
case IDS_RED:
range = or (ival*16, and (itemp, 17B))
case IDS_GREEN:
range = or (ival*4, and (itemp, 63B))
case IDS_BLUE:
range = or (ival, and (itemp, 74B))
}
if ( j < n)
j = j + 1
}
call iishdr (command, LEN_RANGE, OFM+COMMAND, x, 0, 0, 0)
call iisio (range, LEN_RANGE * SZB_CHAR)
} else {
# Return a range value
j = 1
for (i=1; i <= n; i=i+1) {
itemp = range
switch (color[j]) {
case IDS_RED:
data[i] = and (itemp, 60B) / 16
case IDS_GREEN:
data[i] = and (itemp, 14B) / 4
case IDS_BLUE:
data[i] = and (itemp, 3B)
}
j = j+1
if (color[j] == IDS_EOD)
j = j - 1
}
}
end
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