Questions tagged [cp-m]
For questions related to the CP/M operating system by Gary Kildall.
10
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Why does the Commodore C128 perform poorly when running CP/M?
I have seen several claims of poor performance of the C128 when running CP/M, and would like to better understand these claims, especially in comparison to other CP/M machines of the early to mid-...
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Why did CP/M and MS-DOS use the BIOS instead of their own drivers to access hardware?
Modern versions of Windows (and other modern operating systems I suppose) have their own drivers to access hardware.
But as I have read, in the old days, if CP/M or MS-DOS wanted to access hardware, ...
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5
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answer
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Is there a way to boot CP/M automatically on a Z80 RC2014?
I'm using the RC2014 (Z80), running CP/M. The "24886009" ROM chip (photo below) comes with 32k BASIC, 56k BASIC, SCM and CP/M for SIO/2 serial.
When you run CP/M from the RC2014 ROM, you ...
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Fastest non-emulated CP/M Z80-based computer ever built?
What were the fastest CP/M computers ever built?
I'll restrict this to the Z80 variant of CP/M, no CP/M-86, CP/M-68k etc.
Z80 compatibles with higher clock frequencies or more instructions/clock or ...
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21
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Why does CP/M use CALL 0005h for its syscalls?
CP/M, the operating system for Intel 8080 and Z80 (and others as well, but later) used to call 0005h for syscalls. The application would load the syscall number into a specific register (I think it ...
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CP/M in fewer than 80 columns
The standard for business computing in the seventies and eighties was 80 columns, and CP/M was primarily for business computing, so it's unsurprising that CP/M typically ran in 80 columns. For example,...
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Did CP/M provide compatibility for screen-based programs?
I refer here to 'screen-based programs' that are not actually graphical, but take full advantage of the screen as a two-dimensional array of 80x25 characters, as opposed to typical 'command-line ...
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How do you run a program automatically when CP/M 2.2 loads?
Following my question on booting CP/M automatically on RC2014 Z80, I'd like to run a program after CP/M starts, similar to how autoexec.bat works on DOS.
I see that CP/M 3 has PROFILE.SUB which would ...
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6
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Are there any drivers available to use DivMMC on the Spectrum +3e with CP/M plus?
Heading says it all. I have a Spectrum +3 (with +3e ROMs if that makes any difference) with a DivMMC SD card interface.
This works fine in +3e mode, but as I like to use the +3 with CP/M plus (...
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Why does Z80 RC2014 ROM image 88 not have CP/M or BASIC boot options?
While trying to boot to CP/M automatically on my RC2014 Z80, I encountered a problem getting SCM to show a CP/M boot option. According to the docs, ROM address 4000 (88 on the ROM label) is SCM with ...
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