Tag: 65c816

Adapts a W65C816 processor to a 65C02-compatible socket while generating the missing clock and synchronization signals.

The board was out of stock on 2026-07-24. It adapts processor signals but does not provide an independent accelerator clock; the stated 14 MHz is a board capability, not a promise that an Apple IIc will run at 14 MHz. Confirm socket type, clearance, and host timing before installation.

Accelerates an Apple IIe to as much as 16.6 MHz and adds fast auxiliary and Slinky memory.

The product page offered an Add to Cart path on 2026-07-24. Software with cycle-sensitive timing may need the speed reduced; confirm processor, memory configuration, and slot use before ordering.

Replaces the Atari 8-bit CPU with a 20 MHz WDC 65C816 accelerator backed by fast SRAM, SDRAM, flash, and software-selectable modes.

Both Lotharek hardware packages are discontinued. The 800XL package includes two Adaptus boards and requires CPU and OS ROM removal, socket work, a correctly oriented ribbon cable, and EXTSEL, MPD, and ground connections that differ between Freddie and non-Freddie boards. Its page says replacing DRAM with the separate SRAM module is mandatory and records additional O2 timing workarounds for Ultimate 1MB. The XE package may need four or five precision sockets to clear the cartridge slot. The official Rapidus PDF remains unavailable to automated extraction under WF-001, so obtain complete documentation before installing a used board.