@JAC!: Links to SourceForge are obsolete, Atari800 has now migrated to GitHub. This is the correct link.
Regarding Type 67: Some 64KB XEGS cartridges address their banks differently, specifically they use $F8-$FF as bank numbers instead of the more straightforward $00-$07. IIRC Lode Runner is one of them.
Analysis of PCB photos @Jindroush's site proved that there are two XEGS SuperCart PCB variants that work differently - one of them unmaps all banks when bit 3 of the bank number is set. Lode Runner and a few other titles were programmed to be compatible with this PCB.
It was undetected for years because the other PCB variant is backwards compatible - is ignores bit 3, so all ROMs created for the former PCB work correctly on the other as well. It is not true the other way - ROMs that address banks with $0-$7 work only on the latter PCB variant.
So, this is actually new cartidge type, existing since the 80s.
Examples of Type 68 are uploaded at AtariOnline
, specifically the ones without the [h decoded] tag (the others are Type 17).
All three known examples of Type 69 are posted here
. Since the Arabic PCBs also support 64KB PROMs, I went future-proof and added support for the larger variant as well (Type 70). No actual ROM examples of this type exist. A kind-of-example can be created manually, by stitching two copies of a 32KB Type 69 ROM together.