3 ms·
Prototyping using TTL chips to validate the logic design was still common throughout the 1970s. 100 TTL chips is pretty small. The Motorola 68000 team publishe
by zerohp 8y ago
Prototyping using TTL chips to validate the logic design was still common throughout the 1970s. 100 TTL chips is pretty small.
The Motorola 68000 team published several papers that are still available through IEEE that describe the design process. They built a prototype from TTL chips which allowed them to rapidly iterate the microcode, nanocode, and programmed logic arrays without having to wait for samples to come back from manufacturing.
- jacquesm 8y agoThat must have been several boards at least, even at TTL scale integration and using components like adders and decoders as the building blocks.
- jandrese 8y agoThere is a FAQ on the page that explains that a 68k built in the same way would require a board 1.7m square.
- ChickeNES 8y agoI'd love to read them, could you share a doi or link?