[Oberon] Standalone BootLoader format

[Andreas Pirklbauer]

Hi Tomas,

   > In my current version I miss dc := 8, so it seems.

Ah! You are right. In earlier version of module ORP, dc was indeed
initialized to 0, not 8. See for example the ORP as of 7.3.2016 at

http://github.com/Spirit-of-Oberon/ProjectOberon2013/blob/master/Sources/ORP.Mod

I suspect (but am not sure) the switch to dc := 8 in ORP was made sometimes
during 2018.. perhaps when interrupts were introduced on June 28, 2018 (?)