ocr: 1581 SERVICE MANUAL 6 MEMORY MAP - RAM USAGE $0002-$00FF Zero Page Variables $0100-$01FF Vectors, Variables and Stack Area $0200-$02FF Command/Error Buffer and Variables $0300-$03FF Buffer #0 $0400-$04FF Buffer #1 S0500-$05FF Buffer #2 $0600-$06FF Buffer #3 $0700-$07FF Buffer #4 $0800-$08FF Buffer #5 $0900-$09FF Buffer #6 $OA00-SOAFF BAM $OB00-$OBFF BAM $OC00-S1FFF Track Cache Buffer 7 COMMODORE SERIAL INTERFACE The 1581 supports Standard, Fast, and Fast Serial communication like the 1571. A HRF (Host Request Fast) command places the drive in fast serial mode. The 1581 DRF remains (Device in f ...
