Thread: Minix
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Old 29 July 2015, 21:35   #6
rabindranath72
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Join Date: Jul 2015
Location: Stafford
Age: 47
Posts: 35
Quote:
Originally Posted by strim View Post
First I'd have to try to get it running, to be honest I never used Minix on Amiga. My only experiences with Minix are with versoin 3 on x86, which seems to be very different.
Ah yes, Minix 3 is a completely different beast. I suggest you buy Operating Systems: Design and Implementation (first edition) which fully documents Minix 1.1. It's an attractive system because it's very simple, easily expandable, and can be understood and maintained in its entirety by a single person.

Quote:
Originally Posted by strim View Post
So, Minix 1.5 is written in pre-ANSI C? Ouch . I hoped to cross-compile it from some modern OS with not-so-huge amount of work required...
Yup! That's why I want to make my life simple, and use old development tools. Also, the system is very modular; as I am going only to add a driver, I won't need to recompile everything, only compile my part and link with existing object code.


Quote:
Originally Posted by strim View Post
My kudos to you! That's pretty impressive. My only experience writing drivers is for the Cetia PPC SBCs under LynxOS (before it became a Linux variant.) I worked in some astrophysics projects, writing drivers for real-time data acquisition and monitoring systems. Never dealt with disk peripheral, so it will be something new.



Quote:
Originally Posted by strim View Post
I don't want to discourage you, but it sounds like a very ambitious project . And there are already UNIX-likes for Amiga that support virtual memory and MMU (NetBSD, Linux). I think the most appealing part of Minix are its very small requirements and the fact it can work even on a plain 68000.
LOL yeah I know of the alternatives, but the point of the experiment is exactly to write the code; I have always been fascinated by the 68030 processor, I never wrote anything related to MMUs, and the simple fact that such an extension still doesn't exist is an attractive enough proposition for me to consider spending time on it. I bought an A1200+68030 accelerator exactly for this purpose (definitely not to play games; well except the occasional Sierra or Lucasarts adventure ), so I will have to put the hardware to good use
In any case, for starters I only want to implement some form of memory protection (similar to what the 8088 provides), so I'll have only to hack the memory manager.

Last edited by rabindranath72; 29 July 2015 at 21:41.
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