Path: ...!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: rbowman Newsgroups: comp.os.linux.misc,alt.folklore.computers Subject: Re: The "Good" Old Days - Complete Specs for DX-10 Operating System Date: 2 Oct 2024 16:35:00 GMT Lines: 12 Message-ID: References: <20241002091502.00004cde@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: individual.net SaGukkYn4SqpW9dBZXiRjgyvh+NF4xULB9nl8NoY0t6AcjkHl7 Cancel-Lock: sha1:xHzjWoew+rMifOSg5dszbBptQxs= sha256:b1k+HMaxHz6aWRMBCG3fOhwj/bqd2fQppatov7ejiug= User-Agent: Pan/0.149 (Bellevue; 4c157ba) Bytes: 1433 On Wed, 2 Oct 2024 09:15:02 -0700, John Ames wrote: > I've always found the 9900 concept interesting, although its core > assumption about memory speed doesn't really hold up today; much of the > architecture was eventually reincarnated in TI's MSP430 series micro- > controllers, but they ditched the memory-resident register file. But for > the time, context-switching certainly didn't get any faster than that; > only three actual registers to save, but you still got a comfortably > PDP-11ish environment from the programmer's perspective. I worked on one project that used the 9900. Its claim to fame is TI had a rad hard version.