> Actually Current CP/M-86 and MP/M were CP/M versions that were > multi-user and networkable (though no Internet existed those days, > fortunately)...
I very vaguely remember those days. I almost did a Novell Netware certificate. You could make a living with DBASE-II or Turbo Pascal or C with ISAM, writing simple software for real estate agents or booking systems for car mechanics. I even had nutter post-grad office partner on campus who could route between token ring and thick coax ethernet. There was also this thing called concurrent DOS but I don't remember anything good about it, maybe it was the people I was working with at the time. The source code to CP/M is available on the internet, I have it somewhere, I wonder if anyone would be nuts enough to either port it or use it, if it was ported. You can run CP/M under emulation on a RPI... https://hackaday.com/2016/10/12/raspberry-pi-boots-cpm/ [https://www.bing.com/th?id=OVP.-DtlO7b2K4HjBhbrlbWnJgEsCo&pid=Api]<https://hackaday.com/2016/10/12/raspberry-pi-boots-cpm/> Raspberry Pi Boots CP/M<https://hackaday.com/2016/10/12/raspberry-pi-boots-cpm/> Retrocomputing is an enjoyable and educational pursuit and — of course — there are a variety of emulators that can let you use and program a slew of old computers. However, there’… hackaday.com ________________________________ From: Ralf Quint <freedos...@gmail.com> Sent: Thursday, 26 September 2019 4:06 AM To: freedos-user@lists.sourceforge.net <freedos-user@lists.sourceforge.net> Subject: Re: [Freedos-user] Issue installing FreeDOS on Raspberry Pi 3 On 9/25/2019 9:23 AM, dmccunney wrote: > Why would they do that? To create much simpler OS for RPI than Linux. Who > needs that whole complexity on such little SBC? CP/M would do just fine. > No, it wouldn't. Digital Research developed CP/M as an OS for 8 bit > micros like the Intel 8080 and Zilog Z80. They were single tasking > CPUs supporting a whopping *64K* of address space. OS, applications, > and data all had to fit into 64K. DR offered CP/M not only for the 8080/8085/Z80 8 bit processors, but also for Intel 8086 (x86), Motorola 680x0 and Zilog Z8000 CPUs, and at least the last two don't have a 64K address space limitation... > > The Raspberry Pi uses an ARM Cortex CPU, with a 32bit address space > and a multi-core design. It can run a full multi-user, multitasking > OS like Linux, and does. And ARM CPUs are often used in Internet of > Things devices. The critical point is the the CPU can run a full > TCP-IP networking stack, and become a node *on* the Internet. A > second critical point is the the costs of such CPUs have dropped to > the point where you *can* affordably use something like a a 32bit ARM > CPU in an embedded device. Actually Current CP/M-86 and MP/M were CP/M versions that were multi-user and networkable (though no Internet existed those days, fortunately)... Ralf --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus _______________________________________________ Freedos-user mailing list Freedos-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-user
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