Check the listing for details. SLAM128 - ULA chip replacement for Sinclair ZX Spectrum 128 / 128 +2. Condition: New. Listed at 55.55 USD. SLAM128 is ULA Replacement for Sinclair ZX Spectrum 128 and Spectrum 128 +2SLAM128 is ULA chip CPLD replacementSLAM fits only in Sinclair ZX Spectrum 128 (aka Toastrack) and Sinclair ZX Spectrum 128 +2 (grey case).It is not compatible with models manufactured by Amstrad (in black case, +2A, +2B, +3) Device was designed by Mark Smith and this is version with redesigned PCB by Lotharek. Here are the differences to original design:this version of SLAM supplies all necessary clocks for ZX Spectrum; if your PCB has a problem with 17MHz clock, this device will help (it does not divide frequency, and then multiply it, but uses programmable Epson clock generator; PLL removed from design)lowered 8% input volume needed to drive ear input4 layers PCB