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flat assembler > Projects and Ideas > [solved] troubleshooting cp/m-86 programing

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connor



Joined: 07 Jun 2016
Posts: 52
Location: sj ca
Ive been trying out assembly programing in CP/M-86

i go as far as making a .cmd file

but when i run it nothing happens

ctrl+c dosnt work.

it happens with any program i write

not just with gencmd but with link-86

what is going on here?

heres my program:

ORG 0100H
END

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Post 20 Feb 2019, 06:37
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 16702
Location: In your JS exploiting you and your system
Your code appears to be completely empty, there are no instructions there. At the very least you will need something to return back to the OS. I haven't looked at the CP/M-86 spec but it might be "int 0x20" or "ret" or something. Once you get your code exiting properly you can then move on to a simple "Hello world!" application.


Last edited by revolution on 21 Feb 2019, 06:03; edited 1 time in total
Post 20 Feb 2019, 06:47
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connor



Joined: 07 Jun 2016
Posts: 52
Location: sj ca
setting the origin

and exit back to cpm

is all i'm trying to do

the interrupt your talking about

might be

int 224

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Post 20 Feb 2019, 07:13
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connor



Joined: 07 Jun 2016
Posts: 52
Location: sj ca
OK HERE WE GO I FIGURED IT OUT:

;the simplest program you can make in cp/m-86
org 0100h
xor cx,cx ; warm boot reset
int 224 ;bdos recall
end

; it works only in this way
; y'all can figure where to go from here
Post 21 Feb 2019, 05:54
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