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Forum: Coders. Tutorials 08 December 2018, 01:18
Replies: 111
Views: 29,659
Posted By phx
Indeed. You're right. So the only advantages...

Indeed. You're right.

So the only advantages by using DBcc are:
- it is still faster on the 68010 (DBcc-loop cache)
- it is shorter
Forum: Coders. Tutorials 07 December 2018, 23:43
Replies: 111
Views: 29,659
Posted By phx
I like doing strlen() with dbeq. It also takes...

I like doing strlen() with dbeq. It also takes advantage of the 68010 DBcc-cache. :)

moveq #-1,d0
.1: tst.b (a0)+
dbeq d0,.1
not.l d0


EDIT: Oh, just...
Forum: Coders. Tutorials 06 December 2018, 22:20
Replies: 111
Views: 29,659
Posted By phx
Yes. V36 means OS2.0. You will find Amiga 500s...

Yes. V36 means OS2.0. You will find Amiga 500s with any type of ROM, from 1.2 to 3.1. 1.3 is probably the most frequent.


Certainly not true. Or I misunderstood you. There is "rol #x,Dn", "lsr...
Forum: Coders. Tutorials 06 December 2018, 16:29
Replies: 111
Views: 29,659
Posted By phx
No. All those exec.library functions shown there...

No. All those exec.library functions shown there are in the ROM and receive arguments in registers. CreateMsgPort() is also such a shared library function (offset -666), but without any argument...
Forum: Coders. Tutorials 06 December 2018, 14:11
Replies: 111
Views: 29,659
Posted By phx
Text() is just raw text font output on the...

Text() is just raw text font output on the bitmap. Either parse the control sequences yourself, or use CMD_WRITE from console.device. But it requires more than opening a window to make it a working...
Forum: Coders. Tutorials 06 December 2018, 14:06
Replies: 111
Views: 29,659
Posted By phx
Beware! This is OS4.x code, which is not the...

Beware! This is OS4.x code, which is not the intended target system, as far as I understood. For OS1/2/3 the code is simpler, as you don't have to deal with "Interfaces", but just open the libraries....
Forum: Coders. Tutorials 02 December 2018, 13:55
Replies: 111
Views: 29,659
Posted By phx
I would recommend reading the hardware reference...

I would recommend reading the hardware reference manual concerning 8520/652x-like I/O chips first, before programming them.

Reading the CIA's ICR (Interrupt Control Register) acknowledges the...
Forum: Coders. Tutorials 02 December 2018, 11:31
Replies: 111
Views: 29,659
Posted By phx
Or, with a higher chance of success: ...

Or, with a higher chance of success:

move.l level2_vector,a2
:)
Forum: Coders. Tutorials 01 December 2018, 16:20
Replies: 111
Views: 29,659
Posted By phx
Yes, I know I'm a bit late, but nobody posted a...

Yes, I know I'm a bit late, but nobody posted a real answer to this question yet, just the workaround with BASEREG. :)


What happened here is that vasm correctly identified "(tab,A6)" as a 16-bit...
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