IBM RT Series Hardware Reference Manual page 333

TNL SN20-9844 (March 1987) to 75X0235
Queue Link Pointer Register
I~--------------~------------------_I
Bits 00-15 RETURN POINTER
Figure 13. Queue Link Pointer Register (Address X'D9F814')
The graphic operations processor uses the queue link register during a branch and link queue
graphic operation. The queue return point is stored in this register. Care should be taken when
writing to this register. See graphic operation command queue for details.
Queue Mode Register
DATA FIELD
15
Bits 00-14 reserved
Bits 15 SELECT FLAG
Figure 14. Queue Mode Register (Address X'D9F816')
The graphic operations processor uses the queue mode register for temporary memory. Care
should be taken when writing to this register. See graphic operation command queue for details.
Extended Monochrome Graphics Adapter 21