X-Received: by 2002:a05:622a:1304:b0:403:b014:538f with SMTP id v4-20020a05622a130400b00403b014538fmr11814qtk.10.1690313975856; Tue, 25 Jul 2023 12:39:35 -0700 (PDT) X-Received: by 2002:a05:6870:b7ac:b0:1bb:4dd1:56e8 with SMTP id ed44-20020a056870b7ac00b001bb4dd156e8mr41355oab.8.1690313975468; Tue, 25 Jul 2023 12:39:35 -0700 (PDT) Path: csiph.com!1.us.feeder.erje.net!feeder.erje.net!usenet.blueworldhosting.com!diablo1.usenet.blueworldhosting.com!peer01.iad!feed-me.highwinds-media.com!news.highwinds-media.com!news-out.google.com!nntp.google.com!postnews.google.com!google-groups.googlegroups.com!not-for-mail Newsgroups: comp.os.cpm Date: Tue, 25 Jul 2023 12:39:35 -0700 (PDT) In-Reply-To: Injection-Info: google-groups.googlegroups.com; posting-host=89.245.69.117; posting-account=RHtB3AoAAABZlu_FJY7ySUmJrtfW41bO NNTP-Posting-Host: 89.245.69.117 References: <0b23887c-d521-4424-8e62-8758cb92c763n@googlegroups.com> User-Agent: G2/1.0 MIME-Version: 1.0 Message-ID: Subject: Re: The ideal standalone Z80-based retro computer From: Udo Munk Injection-Date: Tue, 25 Jul 2023 19:39:35 +0000 Content-Type: text/plain; charset="UTF-8" X-Received-Bytes: 1653 Xref: csiph.com comp.os.cpm:13830 Adam Sampson schrieb am Dienstag, 25. Juli 2023 um 20:45:04 UTC+2: > It would be nice to have a banking scheme that works well both for MP/M > and FUZIX, and serial ports that are capable of running reliably at high > speeds (115200+ baud). See z80pack cpmsim memory implementation, works with CP/M 3, MP/M and Fuzix. A serial port runnig at 115kbaud lets the Z80 @ 4 MHz service that and nothing else anymore. Even with a larger buffer the Z80 gets overrun if it is running some OS besides this serial port.