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Search: Posts Made By: Don_Adan
Forum: Coders. Asm / Hardware 04 July 2020, 12:20
Replies: 7
Views: 253
Posted By Don_Adan
Yes, this is legal for all Amigas. I fixed some...

Yes, this is legal for all Amigas. I fixed some replay routines from move.b D0,$dff0a8
to move.b D0,$dff0a9.
Forum: Coders. Asm / Hardware 06 June 2020, 00:56
Replies: 47
Views: 2,168
Posted By Don_Adan
If target is 68000, then removing divu is better...

If target is 68000, then removing divu is better option. Can save many CPU cycles. I removed unnecessary divu from Mugician II code (dont call 2-3 divide for same input values) and it give visible...
Forum: Coders. Asm / Hardware 03 June 2020, 03:33
Replies: 13
Views: 797
Posted By Don_Adan
moveq #0,d4 moveq #0,d5 is unnecessary if you...

moveq #0,d4
moveq #0,d5
is unnecessary if you are using ext.w and ext.l later.
Forum: support.Games 08 May 2020, 02:51
Replies: 81
Views: 6,439
Posted By Don_Adan
Try to play IPF version and compare, game can be...

Try to play IPF version and compare, game can be protected in Gods style (very hard to play, if bad crack).
Forum: Retrogaming General Discussion 30 April 2020, 00:29
Replies: 6
Views: 929
Posted By Don_Adan
This is hack or hidden message to crackers?

This is hack or hidden message to crackers?
Forum: project.aGTW 24 April 2020, 18:32
Replies: 471
Views: 99,489
Posted By Don_Adan
Why? You can play this game in Canadian museum :)...

Why? You can play this game in Canadian museum :) Personal Computer Museum in Brantford, ON Canada (http://www.pcmuseum.ca).

"I can also assure you that this is one awesome game. Right now, the...
Forum: support.Games 14 April 2020, 23:56
Replies: 80
Views: 8,049
Posted By Don_Adan
http://eab.abime.net/showthread.php?t=60346

http://eab.abime.net/showthread.php?t=60346
Forum: support.Games 13 April 2020, 14:03
Replies: 80
Views: 8,049
Posted By Don_Adan
Bad cracked version.

Bad cracked version.
Forum: support.Games 23 March 2020, 02:51
Replies: 63
Views: 3,675
Posted By Don_Adan
Yes, PAL and NTSC disks can be different. But...

Yes, PAL and NTSC disks can be different. But most files can be identical, only stored at different offsets or different disks. The best is rip all RNC files from PAL and NTSC versions. Find all...
Forum: support.Games 23 March 2020, 00:43
Replies: 63
Views: 3,675
Posted By Don_Adan
Why? you can compare files from PAL and NTSC...

Why? you can compare files from PAL and NTSC version, also RNC files has checksums. Then if only one bit is changed its possible to restore good file. Some game used same file on 2 disks, then better...
Forum: support.Games 17 March 2020, 21:16
Replies: 63
Views: 3,675
Posted By Don_Adan
If i remember right, this game has HD Install on...

If i remember right, this game has HD Install on first disk. Simple call HD install and check if all disks are accepted.
Forum: Coders. General 01 March 2020, 23:26
Replies: 5
Views: 756
Posted By Don_Adan
You can try to disable CD in CD32 boot menu, and...

You can try to disable CD in CD32 boot menu, and try to boot. If this is possible then you can disable CD motor off.
Forum: project.WHDLoad 22 February 2020, 14:24
Replies: 45
Views: 1,964
Posted By Don_Adan
No, i dont have Nils Meier email. For Skid Row...

No, i dont have Nils Meier email. For Skid Row contact, you can ask here, i think.

http://eab.abime.net/showthread.php?t=82401

And maybe it can be promotional game or attached to german...
Forum: project.WHDLoad 22 February 2020, 12:53
Replies: 45
Views: 1,964
Posted By Don_Adan
Seems that Gotcha was unpublished/unreleased...

Seems that Gotcha was unpublished/unreleased game. No review in Amiga magazines. If you want original version you can try to contact with game author Nils Meier or Skid Row supplier (Sub Zero?).
Forum: Coders. Asm / Hardware 18 January 2020, 03:21
Replies: 13
Views: 851
Posted By Don_Adan
I dont know how many chip ram free you have for...

I dont know how many chip ram free you have for sampled music, but you can use ADPCM (rate 1:2, if I remember right) or NTSP (rate 5:9). Or simple pack sample with PackFire (LZMA) or Arj7, and depack...
Forum: Coders. Asm / Hardware 18 January 2020, 01:43
Replies: 13
Views: 851
Posted By Don_Adan
Decoding from chip ram to chip ram can be not...

Decoding from chip ram to chip ram can be not very good for 68020+. But i dont know how many CPU time you have. If I remember right for pure chip ram sample playing you can use replay from...
Forum: Coders. Asm / Hardware 18 January 2020, 00:27
Replies: 13
Views: 851
Posted By Don_Adan
for very long samples, you must/can use small...

for very long samples, you must/can use small buff in chip ram. samples are copied/depacked from fast memory to this buffer. or you can use Ready Soft style player, blitter decoding, 4bit quality.
Forum: Coders. Asm / Hardware 18 January 2020, 00:11
Replies: 13
Views: 851
Posted By Don_Adan
you dont need to play long sample from chip ram. ...

you dont need to play long sample from chip ram.
for handling long sample players on Amiga you can check source players for:
ADPCMmono
NTSP
onEscapee
and from custom modules from Dragons Lair...
Forum: request.Modules 03 January 2020, 00:32
Replies: 34
Views: 5,800
Posted By Don_Adan
You can use TFMX's EagleRipper for EaglePlayer2....

You can use TFMX's EagleRipper for EaglePlayer2. Exotic Ripper dont needs external files to work, but i never used latest version with GUI, only older CLI version. Requester library can be used, but...
Forum: Coders. General 23 December 2019, 17:33
Replies: 8
Views: 786
Posted By Don_Adan
Perhaps odd address problem?

Perhaps odd address problem?
Forum: Coders. General 17 December 2019, 15:28
Replies: 85
Views: 8,808
Posted By Don_Adan
Then maybe packed exe can be shortest. If you...

Then maybe packed exe can be shortest. If you want you can check size of LZMA optimised depacker from BC Kid. I cant check this.
Forum: Coders. General 17 December 2019, 13:44
Replies: 85
Views: 8,808
Posted By Don_Adan
My version was optimised and perhaps was short...

My version was optimised and perhaps was short enough. I used this one only for fully PC relative code and with BSS_Code hunk, because i dont want to use alloc/free memory and to reloc code. I dont...
Forum: Coders. General 17 December 2019, 11:49
Replies: 85
Views: 8,808
Posted By Don_Adan
The best compression ratio has PackFire (LZMA...

The best compression ratio has PackFire (LZMA mode). Depacking is slow, but can be ok for 4KB intro. I created (packed only) one 4KB intro for test some years ago.
Forum: Coders. Asm / Hardware 16 December 2019, 16:56
Replies: 16
Views: 804
Posted By Don_Adan
Perhaps not, if i remember right. You can of...

Perhaps not, if i remember right. You can of course clear Origin. Mostly I used CED for replacing START+$2 with $8. Or you can add in resourced file START=$6000. I sometimes set extra label too and...
Forum: Amiga scene 15 December 2019, 06:15
Replies: 15
Views: 4,660
Posted By Don_Adan
White disk looks like a different Lemmings demo...

White disk looks like a different Lemmings demo from Psygnosis:

https://www.ebay.ie/itm/Lot-6-Vintage-Amiga-3-5-Floppy-Disks-Various-Programs/274109482360?hash=item3fd232c578:g:VKcAAOSwmY1dY-hF
Forum: Retrogaming General Discussion 02 December 2019, 21:40
Replies: 456
Views: 28,630
Posted By Don_Adan
Then maybe better poll for porting games with...

Then maybe better poll for porting games with available original source code, like f.e Star Control 2?
Forum: Coders. General 01 December 2019, 17:38
Replies: 106
Views: 5,033
Posted By Don_Adan
Ok, anyway it will be interesting if you can test...

Ok, anyway it will be interesting if you can test latest 5 versions on real A500 too. You need access to PC with disk drive, this is the easiest method to share files between PC and Amiga 500.
Forum: Coders. General 01 December 2019, 00:40
Replies: 106
Views: 5,033
Posted By Don_Adan
You tested speed on WinUAE. Better test on real...

You tested speed on WinUAE. Better test on real A500. Im not 100% sure that WinUAE timing is OK for all 68000 commands.
Forum: Coders. General 27 November 2019, 16:03
Replies: 106
Views: 5,033
Posted By Don_Adan
If you can replace Move.w d0,a4 Add.l...

If you can replace
Move.w d0,a4
Add.l A2,a4
with
Lea (a2,d0.w),a4
and check it will be nice :)
Forum: Coders. General 27 November 2019, 14:14
Replies: 106
Views: 5,033
Posted By Don_Adan
Interesting. Something must be 2-4 cycles...

Interesting. Something must be 2-4 cycles fastest. (SP) vs 2 swap and/or lea vs add/move?
Forum: Coders. General 27 November 2019, 12:33
Replies: 106
Views: 5,033
Posted By Don_Adan
You can check this version, if you want, but...

You can check this version, if you want, but perhaps same speed.

_PolygonBitmapToPlanes32:
movem.l d2-d7/a2-a6,-(a7)

move.l d2,a6
Add.l a6,a6
Add.l a6,a6 ; a6 = Modulo<<2 =...
Forum: Coders. Asm / Hardware 27 November 2019, 00:18
Replies: 4
Views: 498
Posted By Don_Adan
Your code reads longword from llist+14 offset. ...

Your code reads longword from llist+14 offset.
Better always set size for instructions move.w, dont use only "move", same for "dc".
Forum: Coders. General 26 November 2019, 17:56
Replies: 106
Views: 5,033
Posted By Don_Adan
No, my book is different. 0 cycles for registers...

No, my book is different. 0 cycles for registers using. When/if i will back to life, i will check this :)
Forum: Coders. General 26 November 2019, 16:53
Replies: 106
Views: 5,033
Posted By Don_Adan
In my assembler book Add.w Dx,Ax is 8 cycles ...

In my assembler book
Add.w Dx,Ax is 8 cycles
But
Add.l Ax,Ax is 6 cycles only.
I never tested this in real, then im not sure.
Forum: Coders. General 26 November 2019, 14:24
Replies: 106
Views: 5,033
Posted By Don_Adan
I never tested lea vs move/adda, my 68k...

I never tested lea vs move/adda, my 68k optimisation mentor told me that in real move/adda version is fastest. Anyway I checked my assembler book and also
Move.w d2,A4
add.l a2,a4
version can be...
Forum: Coders. General 26 November 2019, 02:20
Replies: 106
Views: 5,033
Posted By Don_Adan
You can check this version, can be a few cycles...

You can check this version, can be a few cycles fastest, if works. I optimised a few a/b version.

_PolygonBitmapToPlanes32:
movem.l d2-d7/a2-a6,-(a7)

move.l d2,a6
Add.l a6,a6...
Forum: Coders. General 25 November 2019, 19:31
Replies: 106
Views: 5,033
Posted By Don_Adan
Perhaps some code can be changed from longword to...

Perhaps some code can be changed from longword to word, f.e asl.l to asl.w, but i dont know maximum values for inputs.
Forum: Coders. General 25 November 2019, 18:29
Replies: 106
Views: 5,033
Posted By Don_Adan
For which CPU? Reads or writes from chip memory?

For which CPU? Reads or writes from chip memory?
Forum: Coders. General 24 November 2019, 16:46
Replies: 106
Views: 5,033
Posted By Don_Adan
Seems you dont understand me. F.e ...

Seems you dont understand me.
F.e
A5=$00010000
Move.w a5,-(sp) ; $0000
Move.w (sp)+,a5, $00000000
A5 is not restored correctly, if i remember right.
Forum: Coders. General 24 November 2019, 16:15
Replies: 106
Views: 5,033
Posted By Don_Adan
I dont see original C version in 68k assembler....

I dont see original C version in 68k assembler. Anyway using move.w ax,-(sp) and move.w (sp)+,ax is not good idea for me, because ax will be autoextended to longword size, if i remember right.
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