OK got a D510MO MB
I/O chip is Winbond 83627
Set parallel port to EPP mode in BIOS
Tried DOS config utility: fails with /DONE not asserted (EPP data port at base
+4 reads 0xff)
patched config utility to set port in EPP mode
patch does this
temp <= inb(base+0x402)
temp <= temp and 0x1F
temp <= temp or 0x80
outb(base+0x402,temp)
7I43 now works fine, configs/loopback test works etc etc
This suggests 2 things:
1. Intel BIOs are buggy (it never touches the ports mode register whatever
mode you set the port into)
2. The HostMot2 driver/paraport driver are unable to set the port into EPP
mode even though this should be easy (or perhaps linuxs parport driver
breaks something on the chip not sure) probably need to dump the mode
control register to see whats going on
other data:
At startup mode control register (@base+0x402) is 0x15 when working its 0x95
Peter Wallace
Mesa Electronics
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