Editing Sega CD (Model 2) (section)

== Motherboard Revisions ==
{| class="wikitable" style="width:90%; text-align:center;"
|+'''Mega-CD 2 Main-Boards'''
! Rev !! Key ICs !! Notes
|-
| VA0 || 315-5880, CXD2510Q, discrete SDRAM || Japan launch – green soldermask
|-
| VA1 || '''315-5933 “ASIC 3”''' (RAM+gate array in one) || Most common US/EU; no Word-RAM wait glitches
|-
| VA2 (Majesco) || GOAC single-chip + Mitsubishi drive board || Pack-in with late Genesis 3; cost-reduced
|}

''All revisions are cross-compatible; BIOS ROM changes (v2.00→v2.11) fix '''Lunar Eternal Blue''' save bug and 32X pass-through timing.''