It is a timer interrupt hack to check/ redraw the date 250 times a second! Which works fine.
On Saturday, August 20, 2022, Brian White <[email protected]> wrote: > There is a pure ram way to do it. > > I don't have a link handy but I remember the way it was described it poked > a little routine into ram that ends up getting called every time some rom > routine gets called, it detours through this added routine along the way to > modify the result. > > It sounded terrible except for the fact that there is no better way > without editing the rom. > > I think what I saw was made for 100 or NEC, but I would be surprised if > the same thing wasn't possible on 200. > > -- > bkw > > On Sat, Aug 20, 2022, 10:48 AM Greg Swallow <[email protected]> wrote: > >> How Do, >> >> The 19, of 19xx, is in ROM. ROM images are available that have the 19 >> patched to 20. This makes the MT good through 2099. The date routines in >> the MT only use the trailing two digits. Burning a single ROM can be a bit >> much if you do not already have the tools. Easiest way would be, check me >> on this Steve, a REX#. The REX has the Y2K patch built in. Greg (Arcade >> Shopper) should have some. If you'd like just a ROM, there's probably some >> here that could do it for you. I have some 27c256 blanks, but my burner is >> blown. >> >> Anyone? >> >> GregS <>< >> >> Aug 19, 2022 7:05:53 AM Spencer <[email protected]>: >> >> Hello! >> >> Can anyone tell me if it's possible to update an issue with the T200 year >> not being able to be set beyond 1999? I've searched but nothing so far. >> >> Thanks >> >>
