| ??? 02/15/05 18:02 Modified: 02/15/05 23:54 Read: times |
#87552 - 8-BIT MEMORY I/O ? Responding to: ???'s previous message |
AS JAN WACLAWEK SAID :You can use MOVX @R0,A or MOVX @R1,A to load the 8255, eliminating the PUSHes and POPs of DPH/DPL.
Jan Waclawek AS JOIN BUT IN MY USER MANUAL THEY HAVE GIVEN A 16-MEMORY I/O FOR 8255 I/O INTERFACE i.e., from FFOC.......PORT A FFOD.......PORT B FFOE.......PORT C FFOF................ONE PARALLEL PORT FF10.......PORT A FF11.......PORT B FF12.......PORT C FF13................SECOND PARALLEL PORT SO HOW CAN I USE MOVX @R0,A |
