npireg_t
npireg_t drawmode0; /* REX command register */
npireg_t lsmode; /* Mode for line stipple ops */
npireg_t lspattern; /* Pattern for line stipple ops */
npireg_t lspatsave; /* Backup save pattern */
npireg_t zpattern; /* Pixel zpattern */
npireg_t colorback; /* Background color */
npireg_t colorvram; /* Clear color for fast vram */
npireg_t alpharef; /* Reference value for afunctions */
npireg_t smask0x; /* Window GL relative screen mask 0 */
npireg_t smask0y; /* Window GL relative screen mask 0 */
npireg_t _setup;
npireg_t _stepz;
npireg_t _lsrestore;
npireg_t _lssave;
npireg_t xsave; /* copy of xstart integer value for BLOCk addressing MODE */
npireg_t xymove; /* x.y offset from xstart, ystart for relative operations */
npireg_t bresoctinc1;
npireg_t brese1;
npireg_t bress2;
npireg_t aweight0;
npireg_t aweight1;
npireg_t xstarti;
npireg_t xystarti;
npireg_t xyendi;
npireg_t xstartendi;
npireg_t wrmask;
npireg_t colori;
npireg_t hostrw0;
npireg_t hostrw1;
npireg_t dcbmode;
npireg_t word;
npireg_t dcbdata1;
npireg_t smask1x;
npireg_t smask1y;
npireg_t smask2x;
npireg_t smask2y;
npireg_t smask3x;
npireg_t smask3y;
npireg_t smask4x;
npireg_t smask4y;
npireg_t topscan;
npireg_t xywin;
npireg_t clipmode;
npireg_t byword;
npireg_t _unused1;
npireg_t status;
npireg_t ustatus;
npireg_t dcbreset;
npireg_t drawmode1; /* GL extra mode bits */