DayStar Digital, Inc., was a company founded in 1983 by Andrew Lewis as a subcontract manufacturer of electronic assemblies and circuit boards. In 1986, the company released memory upgrades for Apple Macintosh (Mac) computers as its first products, and in 1987, DayStar began to market processor upgrades exclusively for the Mac, the first being for the Apple Macintosh II computer. The company focused exclusively on this market for the full range of Mac computers through 1995, utilizing the Motorola 68030, 68040 and PowerPC 601 processors. These upgrades were installed directly into the Processor Direct Slot of various Macintosh platforms, as on the Macintosh IIci, or via an adapter. DayStar became known as the leading "speed shop" for Macintosh computer systems; it won virtually every Mac editorial award given for product excellence and had the top rated brand among peripheral manufacturers. The company also formed unique strategic relationships with many companies including Apple, IBM and Adobe. In 1995, DayStar was one of three companies in the world awarded licenses by Apple to "clone" the Macintosh computer. Cache and Processor Upgrades FastCache DayStar introduced their FastCache IIci in conjunction with the release of Apple's Macintosh IIci in 1989. It plugged into the Processor Direct Slot and provided 64 KB of Level 2 cache for the IIci's CPU - double what was offered by Apple's own cache card. An additional FastCache IIsi was offered for the Macintosh IIsi in 1991. PowerCache The DayStar PowerCache was a Motorola 68030 processor card running at either 40 or 50 MHz, with an optional 68882 math co-processor. The PowerCache plugged directly into the Processor Direct Slot of the Mac IIci, while in the case of the Mac II, IIx or IIcx, a PDS slot was provided via an adapter that plugged into the CPU socket. The Mac IIsi, LC, or SE/30 could also use the PowerCache with a PDS adapter. In addition to the CPU and (optional) FPU, the PowerCache had 32 KB of Level 2 cache. Turbo 040 The Turbo 040 was DayStar's 68040 based processor card running at 33 or 40 MHz. The 33 MHz version could be fitted with either a full 68040 or the lower cost 68LC040, which lacked an FPU. Both versions came with 128 KB of Level 2 cache. With the exception of the LC, the Turbo 040 was compatible with the same machines as the PowerCache and additionally the IIvx