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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_CONST 3
# IISOFFSET -- Read and Write output bias registers
procedure iisoffset (rw, color, n, data)
short rw # read or write
short color[ARB] # color
short n # number of data values
short data[ARB] # the data
int command,len,x
short const[3]
int i,j
include "iis.com"
begin
command = IREAD+VRETRACE
x = 8 + ADVXONTC
len = LEN_CONST
call iishdr(command, len, SUMPROC+COMMAND, x, 0, 0, 0)
call iisio (const, len * SZB_CHAR)
if ( rw == IDS_WRITE) {
command = IWRITE+VRETRACE
j = 1
for ( i =1 ; color[i] != IDS_EOD ; i = i + 1) {
switch(color[i]) {
case IDS_RED:
const[3] = data[j]
case IDS_GREEN:
const[2] = data[j]
case IDS_BLUE:
const[1] = data[j]
}
if ( j < n)
j = j + 1
}
call iishdr (command, len, SUMPROC+COMMAND, x, 0, 0, 0)
call iisio (const, len * SZB_CHAR)
} else {
j = 1
for ( i = 1 ; i <= n ; i = i + 1 ) {
switch(color[j]) {
case IDS_RED:
data[i] = const[3]
case IDS_GREEN:
data[i] = const[2]
case IDS_BLUE:
data[i] = const[1]
}
j = j+1
if ( color[j] == IDS_EOD )
j = j - 1
}
}
end
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