Editing Commodore 64C (section)

== Cost-Reduction Motherboard Revisions ==
{| class="wikitable"
! Assy No. !! Nick-name !! Key changes !! Used chips !! Used in
|-
| '''250425''' || – || First C64C board; electronically identical to late bread-bin. 12 V SID (6581) still used. || PLA (906114-01), 8701 absent || Early 1986 transition units
|-
| '''250466''' || “Long 64C” || Added HMOS 8500 CPU & 856x VIC; still eight DRAMs. || PLA (906114-01) || Mid-1986
|-
| '''250469-(A/B/C)''' || “Short board” || Major integration:  
* New '''Super-PLA''' 251715-01 / 252535-01 (also contains colour RAM & 74LS257 logic).  
* DRAM reduced to two × 41464.  
* On-board 8701 clock generator. || Super-PLA; HMOS logic; 8580 SID || Late 1986–1994
|-
| '''250469-Aldi''' || “Aldi C64” || Ultra-low-cost run for Aldi supermarkets (Germany, 1993).  Uses 8500 CPU + 6581 SID (!) on a 5 V-only board; additional 7812 fitted. || Same as short board plus linear 12 V reg || 1993
|}

The Super-PLA runs ''cool'' and is considered highly reliable compared with the original ceramic PLA.