The options can be set through the first DWORD of the table (shown in bold below)
[FtdiPort232.NT.HW.AddReg]
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HKR,,"ConfigData",1,01,00,3F,3F,10,27,88,13,C4,09,E2,04,71,02,38,41,9C,80,4E,C0,34,00,1A,00,0D,00,06,40,03,80,00,00,D0,80
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This entry is byte-reversed, so MSB the DWORD reads 3F 3F 00 01 and the least significant bit is Bit 0. The values are given as follows:
Bits 16 - 23: Receive transfer size
Bits 24 - 31: Transmit transfer size
The maximum value permitted in each case is 3F this is the standard default value.
The transfer size in bytes may be calculated as
Transfer size in bytes = (Transfer size entry + 1) * 0x40
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The USB transfer sizes used by a device are located in the registry under
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\FTDIBUS\{Device VID, PID and serial number}\0000\Device Parameters\ConfigData
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