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Diffstat (limited to 'pkg/images/tv/display/iishdr.x')
| -rw-r--r-- | pkg/images/tv/display/iishdr.x | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/pkg/images/tv/display/iishdr.x b/pkg/images/tv/display/iishdr.x new file mode 100644 index 00000000..38ea733d --- /dev/null +++ b/pkg/images/tv/display/iishdr.x @@ -0,0 +1,30 @@ +# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc. + +include <mach.h> +include "zdisplay.h" +include "iis.h" +# IISHDR -- Form IIS header. + +procedure iishdr (id, count, subunit, x, y, z, t) + +int id, count, subunit, x, y, z, t +int i, sum +include "iis.com" + +begin + call achtiu (id, XFERID(hdr), 1) + call achtiu (count, THINGCT(hdr), 1) + call achtiu (subunit, SUBUNIT(hdr), 1) + call achtiu (x, XREG(hdr), 1) + call achtiu (y, YREG(hdr), 1) + call achtiu (z, ZREG(hdr), 1) + call achtiu (t, TREG(hdr), 1) + CHECKSUM(hdr) = 1 + + if (THINGCT(hdr) > 0) + THINGCT(hdr) = -THINGCT(hdr) + sum = 0 + for (i = 1; i <= LEN_IISHDR; i = i + 1) + sum = sum + hdr[i] + call achtiu (-sum, CHECKSUM(hdr), 1) +end |