On Sat, Oct 17, 2020 at 07:20:32PM +0200, Eric Auer wrote: > It basically says there are many ways in which hardware or > software could fail to handle the year, but you do not say > WHICH of them affect YOU. In particular, you could give it > a try and change that "19" to "20" in your CMOS memory :-) > Maybe your BIOS just fails to store the changed values. > > write register number to port 0x70 > read or write contents via port 0x71 > > register number 0x32 contains the century in BCD, e.g. 0x20 > register number 0x09 contains the year, e.g. 0x20 now ;-) > > In some cases, the century might be in another register, > so you should first check what the current contents are. > > Note that OR-ing the register number with 0x80 blocks NMI > and that immediately after port 0x70 access you should > access port 0x71, but messing with year and century will > probably be quite harmless and not time critical.
So I did the following using debug: mov al,32 out 70,al in al,71 --> AX=0020 mov al,09 out 70,al in al,71 --> AX=0094 And indeed: "date" immediately after boot says "Oct 19, 2094" -- regards, Zbigniew _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
