Why the screen does not open? - Page 2

TCH · 22 July 2021, 00:54

Got it,thanks. Stored in d3 and d2. BTW, if i store the old copper at the start, i can close

graphics.library

right away, right?

Edit: Yep, i can. Okay guys, everything works, thanks a lot.

roondar · 22 July 2021, 10:03

Quote:

Originally Posted by TCH

I see, thanks.You must be right, i am an idiot.

Nah, we all make such mistakes when we start. In fact, I still occasionally forget to align the odd variable here and there.

Quote:

Okay guys, everything works, thanks a lot.

Cool, hope you have fun with it

phx · 22 July 2021, 13:14

Quote:

Originally Posted by TCH

What is this

LVO

prefix?

Probably Ross used that designation to match the symbols from amiga.lib with the same name. Alternatively you could import these symbols from amiga.lib with

xref _LVODisable

, etc., without having to know their exact value.

Quote:

Well, it only happened when i tried to access some variables

Especially if you want to write to them, or take their address with '#', right?
These are the cases where the assembler has to add a relocation entry to your executable. The format of that relocation table is

HUNK_RELOC32SHORT

by default (to save some space), which AmigaDOS only understands since OS2.0. Hence,

-kick1hunks

, which you should always use when targetting Kickstart 1.x systems.

TCH · 23 July 2021, 19:38

Quote:

Originally Posted by phx

Probably Ross used that designation to match the symbols from amiga.lib with the same name. Alternatively you could import these symbols from amiga.lib with

xref _LVODisable

, etc., without having to know their exact value.

I see, thanks.

Quote:

Originally Posted by phx

Especially if you want to write to them, or take their address with '#', right?
These are the cases where the assembler has to add a relocation entry to your executable. The format of that relocation table is

HUNK_RELOC32SHORT

by default (to save some space), which AmigaDOS only understands since OS2.0. Hence,

-kick1hunks

, which you should always use when targetting Kickstart 1.x systems.

Now, that certainly explains why it refused to run with 121. Thanks for the explanation.

22 July 2021, 00:54	#21
TCH Newbie Amiga programmer Join Date: Jun 2012 Location: Front of my A500+ Age: 38 Posts: 372	Got it,thanks. Stored in d3 and d2. BTW, if i store the old copper at the start, i can close graphics.library right away, right? Edit: Yep, i can. Okay guys, everything works, thanks a lot. Last edited by TCH; 22 July 2021 at 01:01.

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