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> we have: > BSY=0; DRQ=0 : HP2:HI0 > BSY=0; DRQ=1 : HP2:HP4 > BSY=1; DRQ=0 : HP2:HP2 > BSY=1; DRQ=1 : ??? In a host's sample of x3F6 Alternate Status, or of x1F7 Status, seeing BSY=1 makes DRQ indeterminate. If the t13.org text tells the host to behave differently when DRQ=0 or DRQ=1 seen together with BSY=1, then the t13.org text errs. (Or else I've missed a significant backwards-incompatible change in the standard. I have not myself closely studied that text since I was last responsible for complying with it, which was Spring of 1998.) > "Host PACKET non-data and PIO data command state diagram" > (figure 53 in d1532v2r4.pdf). I'm ignoring the overlapped modes, > and I'm assuming nIEN=0. Delightfully precise cross-reference, thank you. Pat LaVarre bc: [EMAIL PROTECTED]
