Some notes about XSD module:
- It's 4-layers board.
- Layers order: Top(GTL), G1, G2, Bottom(GBL)
- 74LVC1G04 can be SOT23-5 or SC70-5. Footprint is universal. I prefer SC70-5
- It's better to use mixed set of caps 10uf, 1uf, 0.1uf
- Do not use XSD board for single chip module. It works, but timings aren't good. Use XS v2.2 which is in-line with XSD.
Both new XS and XSD modules now a little higher but they are lower than 10mm FAN on I/O board. So size of fully assembled MiSTer won't change.
Now modules have notches for easier extraction.
Both modules are of v2 standard and requires all SDRAM cores releases from mid-July or later. Modules have no arduino pins and compatible with future MiSTer expansion to dual-SDR version. Do not plug SDRAM to other 40pin connector now. Cores will need update to support new framework.