| RTM/Z80 [message #9238] |
Mon, 18 October 2021 21:21  |
lszilagyi
Messages: 3
Registered: October 2021
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Junior Member |
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Hi,
My name is Ladislau Szilagyi, I'm 67 years old and I'm a big fan of Z80 retro computers.
In august I published on GitHub my RTM/Z80 project.
RTM/Z80 is a multitasking kernel, built for Z80 based computers, written in Z80 assembly language, providing its users with an Application Programming Interface (API) accessible from programs written in the C language and the Z80 assembly language.
It is intended to be a simple and easy to use learning tool, for those who want to understand the tips and tricks of the multitasking software systems.
RTM/Z80 is a "low profile" multitasking system; it is written entirely in Z80 assembler language and uses as a building platform the vintage HiTech Z80 software, which may be run on a "real" Z80 computer or on a Z80 "simulator". However, you can use also the C language and "mix" C code with Z80 assembly code when writing RTM/Z80 applications.
RTM/Z80 does not pretend to be a "real-time" system; for this target, you need much more powerful CPU power; the 7.3728 MHz Z80 is a low-placed processor in this perspective.
Building RTM/Z80 applications does not imply the use of any Unix/Linux development platform. All you need is CP/M, knowledge of Z80 assembly language or C language and being used to operate the HiTech tools (assembler, C compiler, linker).
RTM/Z80 is not a "competitor" of the many Z80 multitasking systems available on the market, it is only a learning tool for those who want to understand the "tips & tricks" of multitasking; because of this, it's structure is simple and straightforward. However, the author tried to build also a versatile and efficient system, with performances comparable with other popular Z80 multitasking systems.
I finished the testing on RC2014 (SC108, SC110, 32KB Memory Module, 512KB Memory Module).
I'm waiting for your opinions and suggestions!
regards,
Ladislau
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| Re: RTM/Z80 [message #9249 is a reply to message #9241] |
Tue, 19 October 2021 08:54  |
lszilagyi
Messages: 3
Registered: October 2021
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Junior Member |
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Hi Andrew,
the basic hardware requirement is that interrupt mode 2 is mandatory.
Of course, a clock must be accessible, on interrupts (5 or 10ms tick is ok), and also a serial, on interrupts. I use the Z80 CTC & SIO.
My system is small, 4K ROM & 8KB RAM is just enough for the smallest version.
I published the sources and a manual at https://github.com/Laci1953/RTM-Z80
regards,
Ladislau
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