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Length: 3862 (0xf16)
Types: TextFile
Names: »DMADIF«
└─⟦b8af24a88⟧ Bits:30005796 CR80 Disc Pack ( MINICAMPS )
└─ ⟦this⟧ »GENS.D!DMADIF«
; MERGE FILE DMADIF
;***********************************************************************
; *
; D M A I / F D E F I N I T I O N *
; *
; CONFIG ID: CSS825 *
; VERSION: 1 *
; DATE: 790801 *
; AUTHOR: JHO *
; *
;***********************************************************************
;----------------------------------------------------------------------
; MESSAGE TO DMA DRIVER
;----------------------------------------------------------------------
AX=0
DMAMOP:= AX, AX=AX+1 ; OPERATION,SECTION OF LIST
; FIELDS:
DMACMP:= 8 ; COMMAND, POSITION
DMACML:= 8 ; COMMAND,LENGTH
DMASTP:= 2 ; SECTION,POSITION
DMASTL:= 2 ; SECTION, LENGTH
BX=0 ; COMMANDS:
DMAABT:= BX, BX=BX+1 ; ABORT
DMATXF:= BX, BX=BX+1 ; TRANSFER
DMACRT:= BX, BX=BX+1 ; CREATE PORT GROUP
DMAINI:= BX, BX=BX+1 ; INITIALIZE
DMAMET:= AX ; EVENT (ONLY FOR ABORT COMMAND)
DMAMLS:= AX, AX=AX+1 ; LIST (ABS WORD ADDR)
DMAMPT:= AX, AX=AX+1 ; PORT NUMBER (0-MAX)
ANYPRT:= -1 ; "ANY PORT"
DMAMGP:= AX, AX=AX+2 ; GROUP (4 CHARS)
IF AX NE CONTLENGTH THEN USE 16 FI
;----------------------------------------------------------------------
; ANSWER FROM DMA DRIVER
;----------------------------------------------------------------------
AX=0
DMAARS:= AX, AX=AX+1 ; RESULT (STANDARD)
DMAACC:= AX, AX=AX+1 ; COMPLETION CODE
BX=0 ; CODES:
DMATOK:= BX, BX=BX+1 ; COMMAND COMPLETE
DMANAP:= BX, BX=BX+1 ; NO AVAILABLE PORTS
; /UNKNOWN PORT
DMAILL:= BX, BX=BX+1 ; ILLEGAL COMMAND
DMATLE:= BX, BX=BX+1 ; TRANSFER LIST ERROR
DMAETX:= BX, BX=BX+1 ; TRANSMISSION ERROR
DMAPRG:= BX, BX=BX+1 ; ABORTED
DMAAPT:= AX, AX=AX+1 ; PORT NUMBER
DMAAGP:= AX, AX=AX+2 ; GROUP
IF AX NE CONTLENGTH THEN USE 16 FI
;----------------------------------------------------------------------
; TRANSFER LIST ELEMENT
;----------------------------------------------------------------------
AX=0
XFECOM:= AX, AX=AX+1 ; COMMAND,SECTION OF DATA
XFECMP:= 8 ; COMMAND, POSITION
XFECML:= 8 ; COMMAND, LENGTH
XFESTP:= 2 ; SECTION, POSITION
XFESTL:= 2 ; SECTION, LENGTH
BX=0 ; COMMANDS:
XFCINP:= BX, BX=BX+1 ; INPUT TRANSFER
XFCOUT:= BX, BX=BX+1 ; OUTPUT TRANSFER
XFCTRM:= BX, BX=BX+1 ; TERMINATE TRANSFERS
XFCSKN:= BX, BX=BX+1 ; SKIP N TRANSFERS
XFCSKL:= BX, BX=BX+1 ; SKIP TO LAST TRANSFER
XFELNK:= AX, AX=AX+1 ; LINK
XFECNT:= AX, AX=AX+1 ; BYTE COUNT/SKIP COUNT
XFEADD:= AX, AX=AX+1 ; WORD ADDRESS (ABS)
XFEOFF:= AX, AX=AX+1 ; BYTE OFFSET
XXFLNG:= AX ; LENGTH OF TRANSFER LIST ELEMENT «a5»