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Forum: Coders. General 21 April 2018, 17:55
Replies: 493
Views: 33,215
Posted By frank_b
Conversions and porting. Not the same thing ;) ...

Conversions and porting. Not the same thing ;) One is harder than the other. No source code on a binary conversion ;) Reversing games is challenging from personal experience. I did it commercially...
Forum: Coders. General 20 April 2018, 16:20
Replies: 493
Views: 33,215
Posted By frank_b
What happens if the weaker system wasn't taken...

What happens if the weaker system wasn't taken into account when the game was designed? Sounds like the game would have to be hacked to bits or significant time would be spent optimising every last...
Forum: Coders. General 20 April 2018, 09:18
Replies: 493
Views: 33,215
Posted By frank_b
I'm sorry but you may have misunderstood. That's...

I'm sorry but you may have misunderstood. That's completely wrong. It is more time consuming to port downwards.
Forum: Coders. General 19 April 2018, 19:42
Replies: 493
Views: 33,215
Posted By frank_b
Sorry but a game dev is always going to prefer to...

Sorry but a game dev is always going to prefer to port upwards. It's easier and time is money. There is no reason why the more powerful machine version can't be tweaked however. A port isn't...
Forum: Coders. General 06 April 2018, 20:10
Replies: 493
Views: 33,215
Posted By frank_b
Not enough chip bandwidth for six bit high res...

Not enough chip bandwidth for six bit high res ham.
Forum: Coders. General 06 April 2018, 17:00
Replies: 493
Views: 33,215
Posted By frank_b
The only major oddity was that it wasn't fully...

The only major oddity was that it wasn't fully compatible with the 68k. TAS <cough>
Forum: Retrogaming General Discussion 06 April 2018, 00:47
Replies: 35
Views: 1,083
Posted By frank_b
Fixed point coordinates perhaps? It's possible to...

Fixed point coordinates perhaps? It's possible to have a 50 hz game update on screen objects with fractional fixed point values. That way every object doesn't have to move at a linear 50 fps.
Forum: Coders. Asm / Hardware 30 March 2018, 18:42
Replies: 9
Views: 446
Posted By frank_b
He's using the halftone/smudge mode for some free...

He's using the halftone/smudge mode for some free effects in real time. Looks like it maxes out at 16% CPU time. Impressive!!!
https://www.youtube.com/watch?v=Xc0zv4YFitI&feature=youtu.be
Forum: Coders. Asm / Hardware 30 March 2018, 16:32
Replies: 9
Views: 446
Posted By frank_b
Bear in mind the Atari blitter has an indirect...

Bear in mind the Atari blitter has an indirect addressing mode and 16 word look up table built in. That can be combined that with first/middle/last word masks protecting selected bits in the...
Forum: Retrogaming General Discussion 27 March 2018, 18:30
Replies: 120
Views: 4,056
Posted By frank_b
They weren’t difficult to get ahold of at the...

They weren’t difficult to get ahold of at the time. I have one. Nowadays they are astronomically expensive. One went recently for 1100 euros on eBay.
Forum: Retrogaming General Discussion 20 March 2018, 08:26
Replies: 65
Views: 2,195
Posted By frank_b
Both feet, both barrels. :(

Both feet, both barrels. :(
Forum: Retrogaming General Discussion 20 March 2018, 07:30
Replies: 65
Views: 2,195
Posted By frank_b
What's the excuse for AGA then? :( The Amiga died...

What's the excuse for AGA then? :( The Amiga died because it didn't evolve quick enough.
Forum: Retrogaming General Discussion 20 March 2018, 07:19
Replies: 65
Views: 2,195
Posted By frank_b
AGA is outclassed by the Megadrive for scrolling...

AGA is outclassed by the Megadrive for scrolling games. Far more sprites and twice as many 16 colour scrolling layers. The dictionary definition of too little, too late.
Forum: Retrogaming General Discussion 20 March 2018, 07:17
Replies: 65
Views: 2,195
Posted By frank_b
I wonder if CD32 users ever complained about OCS...

I wonder if CD32 users ever complained about OCS ports? :)
Forum: Retrogaming General Discussion 19 March 2018, 21:50
Replies: 65
Views: 2,195
Posted By frank_b
Devil's advocate time. How many excellent games...

Devil's advocate time. How many excellent games wouldn't have been released on the Amiga at *ALL* if they weren't ported from the ST due to the size of the Amiga market at the time? What would have...
Forum: Amiga scene 18 March 2018, 15:18
Replies: 200
Views: 24,967
Posted By frank_b
Well the Falcon has to do c2p here too as it's...

Well the Falcon has to do c2p here too as it's still using an 8 bit screen.
Seems like the audio was offloaded to the DSP. The Ct60 has a more modern memory interface. Video RAM access is quicker...
Forum: Amiga scene 17 March 2018, 19:47
Replies: 200
Views: 24,967
Posted By frank_b
That's a whole load of awesomeness for one single...

That's a whole load of awesomeness for one single desk!
Forum: Retrogaming General Discussion 11 March 2018, 11:21
Replies: 67
Views: 2,689
Posted By frank_b
There are worse examples. At least SpeedBall II...

There are worse examples. At least SpeedBall II was a fantastic game. Their art was generally better than most other games anyway.
I'm thinking of games which could have the scrolling or frame rate...
Forum: Retrogaming General Discussion 09 March 2018, 15:53
Replies: 67
Views: 2,689
Posted By frank_b
That's the result of ridiculously clever coding....

That's the result of ridiculously clever coding. It doesn't prove hardware equivalence. :) It uses sync scrolling. That's a beam synchronous technique which allows for fine adjustment of the low 8...
Forum: Retrogaming General Discussion 09 March 2018, 15:19
Replies: 67
Views: 2,689
Posted By frank_b
Yes. The Amiga hardware reference manual avoids...

Yes. The Amiga hardware reference manual avoids the complexity of a general purpose bitblit function. It focuses on simple use cases suitable for games. Low CPU overhead stuff. It's also very...
Forum: Retrogaming General Discussion 09 March 2018, 15:03
Replies: 67
Views: 2,689
Posted By frank_b
Do you not know the difference between a blitter...

Do you not know the difference between a blitter and hardware scrolling? :D

He's wrong btw. Anima's blitter routines are way faster than anything done in Toki.
I implemented his software sprite...
Forum: Retrogaming General Discussion 09 March 2018, 14:33
Replies: 67
Views: 2,689
Posted By frank_b
Arrow I'm talking about the original Amiga versions...

I'm talking about the original Amiga versions ported from the ST :) Early Amiga games.

Bitmap games for instance could be enhanced properly to use the Amiga hardware.
Forum: Retrogaming General Discussion 09 March 2018, 12:56
Replies: 67
Views: 2,689
Posted By frank_b
Can we see the original quote(s)? I want to know...

Can we see the original quote(s)? I want to know if Dennis is embellishing anything he said. I can't believe anyone that smart would be stupid enough to claim software scrolling is faster than...
Forum: Retrogaming General Discussion 09 March 2018, 12:41
Replies: 67
Views: 2,689
Posted By frank_b
I think you can do perfect Amiga ports to the STe...

I think you can do perfect Amiga ports to the STe if.

a) You don't have dual playfield in the game or have the memory to preshift and pre mask graphics
b) You stick to 4 planes
c) you have...
Forum: Retrogaming General Discussion 09 March 2018, 12:36
Replies: 67
Views: 2,689
Posted By frank_b
No argument there. Hardware features couldn't be...

No argument there. Hardware features couldn't be relied on to be present in every machine.

The Falcon didn't have the Microwire interface and didn't do 6 khz 8 bit sample play back like the...
Forum: Retrogaming General Discussion 09 March 2018, 10:23
Replies: 67
Views: 2,689
Posted By frank_b
Every ST machine from 87 onwards has a space on...

Every ST machine from 87 onwards has a space on the motherboard for a blitter. I have multiple ST machines with it installed. You're right though. It should have been standard on every machine....
Forum: Retrogaming General Discussion 09 March 2018, 10:01
Replies: 67
Views: 2,689
Posted By frank_b
I think he's trying to tell us that software...

I think he's trying to tell us that software scrolling is more effective than using the hardware. Seems an odd position for an Amiga fan!
Very few ST games run at 50hz. There are quite a lot that...
Forum: Retrogaming General Discussion 09 March 2018, 09:40
Replies: 67
Views: 2,689
Posted By frank_b
Then he's clearly off his meds or you're...

Then he's clearly off his meds or you're misquoting him. The STe hardware scrolling is just as good as the Amigas. You could do an R type style scroling with 3 memory moves and two tiles drawn a...
Forum: project.EAB 08 March 2018, 14:30
Replies: 26
Views: 2,005
Posted By frank_b
A coordinated, distributed and MIDI sequenced...

A coordinated, distributed and MIDI sequenced denial of service! Put that etra 1 million clock cycles per second to nefarious use :D
Forum: Retrogaming General Discussion 07 March 2018, 21:21
Replies: 67
Views: 2,689
Posted By frank_b
Beast 2 doesn't look too bad but the frame rate...

Beast 2 doesn't look too bad but the frame rate is much slower.
https://www.youtube.com/watch?v=o0GVazIqKCY
Forum: Retrogaming General Discussion 07 March 2018, 21:02
Replies: 67
Views: 2,689
Posted By frank_b
Absolutely not. The port had to run on 512 k...

Absolutely not. The port had to run on 512 k machine which ruled out preshifting and premasking graphics. It looks terrible compared to the Amiga.
A dude on Atari forum created a little 25 fps...
Forum: Retrogaming General Discussion 07 March 2018, 20:45
Replies: 67
Views: 2,689
Posted By frank_b
Don't assume that's a bottleneck. It's *really*...

Don't assume that's a bottleneck. It's *really* beneficial for fast C2P. It's also possible to ROXR both planes at once in a sprite routine using MCoder's technique that he documented on Atari...
Forum: Retrogaming General Discussion 06 March 2018, 22:41
Replies: 67
Views: 2,689
Posted By frank_b
Just think of it this way. Any time the 8mhz CPU...

Just think of it this way. Any time the 8mhz CPU on the ST is executing code it does so 1 mhz faster than the Amiga. It's even faster when 5 or 6 bitplanes are enabled on a chip or chip/bogo fast...
Forum: Retrogaming General Discussion 06 March 2018, 07:54
Replies: 67
Views: 2,689
Posted By frank_b
The only STe feature is the extended palette on...

The only STe feature is the extended palette on the title screen. It's not using the blitter, hscroll, ADMA or split screen scrolling support in game.
Forum: Amiga scene 05 March 2018, 22:50
Replies: 21
Views: 973
Posted By frank_b
That view of Manhattan at the start looks like...

That view of Manhattan at the start looks like it's from Hoboken in Jersey city? I lived there for a couple of months. I'd have thought the humidity in summer and the cold in winter wouldn't be kind...
Forum: Amiga scene 05 March 2018, 22:28
Replies: 177
Views: 5,493
Posted By frank_b
A phone is faster than his PPC these days. Much...

A phone is faster than his PPC these days. Much much faster. They're also 64 bit. UAE (with JIT) for Arm on a phone would run rings around that setup. If you want to run CPU heavy stuff, WinUAE + JIT...
Forum: Amiga scene 05 March 2018, 19:11
Replies: 177
Views: 5,493
Posted By frank_b
I guess you don't edit digital photos or videos...

I guess you don't edit digital photos or videos then :D That wouldn't be fun on a 040 AGA machine. I think I could just about use mine as a word processor. Any other modern use case wouldn't cut it. ...
Forum: Amiga scene 05 March 2018, 18:37
Replies: 177
Views: 5,493
Posted By frank_b
Could you use one as a primary computer in 2018? ...

Could you use one as a primary computer in 2018? What would you have to give up to do so?
As a hobby machine it's great. As a retro games machine it's great. As a primary computer? You'd need to...
Forum: Amiga scene 05 March 2018, 18:35
Replies: 177
Views: 5,493
Posted By frank_b
:) My blizzard 040 could just about manage a...

:)

My blizzard 040 could just about manage a 128kbit mp3. If you put up with the 30 second pauses.
Forum: Amiga scene 05 March 2018, 18:26
Replies: 177
Views: 5,493
Posted By frank_b
I keep expecting the phrase, "miltary spec" to...

I keep expecting the phrase, "miltary spec" to make an appearance. I'd post the "only Amiga" cover song but Amiga browser users wouldn't be able to enjoy it on youtube :D
Might need ripped to a 16...
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