common DMA list in CBDOS

src/dos_m65/utils/util_dma_launch.s

@@ -0,0 +1,33 @@
+
+; Launch the DMA list
+
+
+util_dma_launch_from_hwbuf:
+
+	; Operation from source $FFD6E00 (hardware SD card / floppy buffer)
+	; Destination has to be set by the caller
+
+	lda #$FF
+	sta DMAJOB_SRC_MB
+	lda #$00
+	sta DMAJOB_SRC_ADDR+0
+	lda #$6E
+	sta DMAJOB_SRC_ADDR+1
+	lda #$0D
+	sta DMAJOB_SRC_ADDR+2
+
+	; FALLTROUGH
+
+util_dma_launch:
+
+	lda #$01
+	sta DMA_ADDRBANK                  ; $D702
+	dec
+	sta DMA_ADDRMB                    ; $D704
+
+	lda #>(DMAJOB_LIST-$8000)
+	sta DMA_ADDRMSB                   ; $D701
+	lda #<(DMAJOB_LIST-$8000)
+	sta DMA_ETRIG                     ; $D705
+
+	rts