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include vdmad.inc VxDcall VDMAD_Get_EISA_Adr_Mode |
The VDMAD_Get_EISA_Adr_Mode service returns the EISA extended mode.
EAX
Specifies the channel number. It must be in the range 0 to 7.
EBX
Specifies the DMA handle.
The CL register contains one of the following values:
| Value | Meaning |
| 0 | 8-bit I/O, with count in bytes |
| 1 | 16-bit I/O, with count in words and address shifted |
| 2 | 32-bit I/O, with count in bytes |
| 3 | 16-bit I/O, with count in bytes |
The hardware does not allow for reading the extended mode for a channel, so VDMAD defaults to the ISA defaults (channels 0–3 are byte channels, and 5–7 are word channels with word addresses and counts). A SYSTEM.INI setting can specify an alternate setting.
ECX, Flags