Dne 05. 08. 22 v 20:18 Kevin O'Connor napsal(a):
> On Wed, Jul 13, 2022 at 03:25:17AM +0200, Petr Cvek wrote:
>> ASPI2DOS.SYS and KEYB.COM from Win 98 SE installation CD (and most likely
>> other DOS versions too) depend on I/O port 0x61 bit 4 to be toggled. This
>> requires timer 1 (I/O 0x41,
Kevin O'Connor wrote:
> > Also Intel ICH7 Family Datasheet, chapter 5.8 states:
> >
> > Programming the counter to anything other than Mode 2 will result in
> > undefined behavior for the REF_TOGGLE bit.
> >
> > Failing to have the timer 1 configured indeed causes affected OSes to
> > freeze
On Wed, Jul 13, 2022 at 03:25:17AM +0200, Petr Cvek wrote:
> ASPI2DOS.SYS and KEYB.COM from Win 98 SE installation CD (and most likely
> other DOS versions too) depend on I/O port 0x61 bit 4 to be toggled. This
> requires timer 1 (I/O 0x41, legacy DRAM refresh) to be correctly set.
> Also Intel
