The $50 to $100 bracket is where most people tend to shop, and this year it’s been dominated by a few interesting trends. Rockchip’s RK3576 has turned up on multiple boards, Qualcomm has made a very strong entrance, and there’s a networking-focused option that doesn’t care about your Geekbench score.
FT Edit: Access on iOS and web
。业内人士推荐吃瓜作为进阶阅读
The DRAM is a fairly dumb device. Say you intend to do a WRITE operation, during initialization you tell the DRAM what the CAS Write Latency is by programming one of its Mode Registers (CWL is the time delay between the column address and data at the inputs of a DRAM), and you have to honor this timing parameter at all times. The memory controller needs to account for the board trace delays and the fly-by routing delays and launch Address and Data with the correct skew between them so that the Address and Data arrive at the memory with CWL latency between them.
now that i’ve written it out, it seems obvious - of course you can treat the lookahead as a single unit and derive it together. but it took a while to get there with all the edge cases and weird interactions between the context tracking and the derivative construction.
年度征文｜「你是专家」这句话，到底是在帮 AI 还是在害你？