Editing Mostek (section)

=== MK3880===
{{multiple image |total_width = 230 |perrow = 1/2
| footer   = Mostek MK3880 (Zilog Z80) die
| image1   = KL Mostek MK3880P Z80.jpg
| caption1 = Mostek MK3880P (Zilog Z80)
| image2   = Mostek MK3880 top metal.jpg
| alt2     = Mostek MK3880 with metal
| caption2 = – metal layer
| image3   = Mostek MK3880 top metal removed.jpg
| alt3     = Mostek MK3880 without metal
| caption3 = – silicon only}}
During the introduction of the [[Zilog Z80|Z80]], [[Zilog]] needed a production partner while they got their own fabs set up. They first signed a production agreement with [[Synertek]], but the company later demanded they sign a [[second source]] deal, allowing Synertek to produce and sell the design on their own. Zilog refused, so the agreement was broken. Zilog then selected Mostek as the only other company capable of building a +5V device (as opposed to +5 and +12).{{sfn|Slater|2007|p=7}} Mostek had developed advanced layout methods which were applied to the Z80, resulting in the device being shrunk by 20%.{{sfn|Slater|2007|p=11}} Mostek was able to sign a [[second source]] deal for what it called the MK3880.{{sfn|Slater|2007|p=4}} The Z80 eventually became the most popular microcomputer family, and was used in millions of embedded devices as well as in many [[home computer]]s and computers using the de facto standard [[CP/M]] operating system, such as the [[Osborne 1|Osborne]], [[Kaypro]], and [[TRS-80]] models.{{efn|Older note left in: Mostek supposedly discovered that Zilog had modified the recipe for Z80 chips to keep the yields low{{Citation needed|date=January 2022}}, thereby buying Zilog time to build their own fabs.}}