|
| Interrups | Categories | Contents |
AH = CEh BL = 00h-0Eh arbitration level to be allocated 0Fh-FFh reserved AL = option bytebit 7-1:
Reserved (0)bit 0:
0 = need DMA channel for arbitration level requested 1 = no channel required for arbitration level
Return:
CF set on error AH = status (80h,86h = function not supported) CF clear on success AL = channel number 00h-07h channel number allocated for the arbiration level 08h-FEh reserved FFh no channel requested for arbitration level AH = status (see #00531)
Notes: Arbitration level 00h has the highest priority, 0Eh the lowest to perform a DMA transfer operation, be sure to call this function first, and call AH=CFh afterward. Failure to use this function can cause unpredictable results.
See Also: AH=CFh
(Table 00531) Values for DMA arbitration status: 00h success 01h arbitration level not available 02h channel not available 03h invalid arbitration level passed
|
| Interrups | Categories | Contents |