There is a (kind of) fix - a plug in module that intercepts RTC calls to the IKBD and substitutes own responses to them. In my case this module not only makes IKBD RTC Y2K compilant, but also has the battery backed up RTC, so using one from UltraSATAN together with it is obsolete. https://www.exxosh...

I have checked it, and I can confirm this bug in UltraSATAN clock. It tries to set IKBD clock with year 0xB9 and fails to do this, then he reads IKBD clock and receives 0xC8 (no matter which year after 0x99 you'd set). I've tested this on TOS 2.06 and 1.62. With my IKBD RTC supplicant module it work...

Next update to keep all RTC related info in one place. It is not the CONTROL.ACC responsible for setting the IKBD date/time. It adjusts just the GEMDOS clock, but since TOS 1.02 GEMDOS Tsettime() function also sets the XBIOS time, and hence updates the IKBD clock. Often seen year 28 (2028) is a resu...

A complication to all this is that different TOS versions seem to use different start dates. This is due to the fact that TOS 1.0 doesn't support IKBD clock through GEMDOS functions at all, and won't initialize GEMDOS clock from IKBD no matter what, TOS 1.2-1.4 won't initialize GemDOS clock from IK...

RP5C15 was made with Z80 in mind, so I doubt they bother to update it for 21st century. On the other hand, the DS1315, even without century bit could support 21 century dates, as it accepts and runs years like 0xB9. There were similar RTC modules at that time, for example Seiko/Epson RTC58321 and OK...

I'm not sure if Ricoch chip in MST is Y2K compilant. If it doesn't work you either have to use some autoloaded software patch or a TOS patch to use it. Alternative is to disable it and build/buy another RTC solution (UltraSATAN, ComosEx). Ricoh RP5C15 for sure uses only 2 digits for year in BCD form...

Some machines report weird years due to strange and completely unneeded TOS patches. I have investigated the problem thoroughly and came to the conclusion, that the only Y2K non-compatible part in Atari ST is IKBD, but it is only used to keep RTC during reset. If machine has a proper RTC module it d...

dazcoull wrote: ↑

Sat Nov 02, 2019 5:18 am

I couldn't just put in 2MB (2x1MB) as wouldn't boot with stripes on screen

You should be able to do that, but you have to install every 2nd SIMM in slot:
SIMM
EMPTY
SIMM
EMPTY

This seems to be a normal behavior of FCP... not only on EmuTOS.

ST images, are actually generic, raw floppy sector images, same as IMG.