Forum: Coders. C/C++
Today, 09:41
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Replies: 26
Views: 1,288
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Forum: Retrogaming General Discussion
17 April 2021, 23:39
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Replies: 58
Views: 2,870
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Forum: Retrogaming General Discussion
17 April 2021, 09:17
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Replies: 58
Views: 2,870
Yes, obviously.
It's acceptable to me.
...
Yes, obviously.
It's acceptable to me.
True.
030 and 020 have same compatibility, but FastRAM outside 16MB address range may be a problem, in which case you just run NoFastMem and play the...
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Forum: Amiga scene
17 April 2021, 03:23
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Replies: 480
Views: 31,483
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Forum: Amiga scene
16 April 2021, 05:42
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Replies: 480
Views: 31,483
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Forum: Coders. C/C++
15 April 2021, 15:54
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Replies: 26
Views: 1,288
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Forum: Retrogaming General Discussion
14 April 2021, 10:46
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Replies: 194
Views: 9,610
Define 'accurately'.
Paula has 14 bits per...
Define 'accurately'.
Paula has 14 bits per channel, which should be plenty enough. But as you say, this is the smallest problem.
Not that strange, it just sums the 3 DAC current outputs in a...
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Forum: Retrogaming General Discussion
12 April 2021, 02:59
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Replies: 194
Views: 9,610
Not really. The YM22149 generates square waves...
Not really. The YM22149 generates square waves with up to 32 levels. Paula can easily reproduce that with enough fidelity that you would not be able to tell that it wasn't a YM, and play several...
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Forum: Retrogaming General Discussion
11 April 2021, 08:55
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Replies: 194
Views: 9,610
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Forum: Amiga scene
10 April 2021, 03:51
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Replies: 480
Views: 31,483
If this was true then chip manufacturers would...
If this was true then chip manufacturers would have gone for the smallest possible size straight away - but they couldn't because their processes were not clean and accurate enough. Only after...
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Forum: Amiga scene
09 April 2021, 09:03
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Replies: 480
Views: 31,483
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Forum: Coders. Asm / Hardware
07 April 2021, 23:38
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Replies: 3
Views: 414
There is also this online reference...
...
There is also this online reference...
MC680x0 Reference 1.1, ©April,May 1995 by Flint/DARKNESS. (http://oldwww.nvg.ntnu.no/amiga/MC680x0_Sections/index.HTML)
...which may be more convenient...
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Forum: Amiga scene
07 April 2021, 02:29
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Replies: 480
Views: 31,483
No, they didn't. And with an IBM computer they...
No, they didn't. And with an IBM computer they didn't have to worry because IBM had their back. Not that using it was easy. You had to pore over manuals and try to remember arcane commands with...
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Forum: Amiga scene
06 April 2021, 03:24
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Replies: 480
Views: 31,483
That's right. A PC was always better than an...
That's right. A PC was always better than an Amiga in every way that matters (even a 1981 PC with 64k RAM and no disk drive). So why would anyone want an Amiga?
A computer that is not used for...
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Forum: Retrogaming General Discussion
05 April 2021, 03:29
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Replies: 194
Views: 9,610
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Forum: Amiga scene
03 April 2021, 23:45
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Replies: 29
Views: 2,262
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Forum: Amiga scene
03 April 2021, 23:16
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Replies: 480
Views: 31,483
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Forum: support.Hardware
03 April 2021, 01:28
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Replies: 102
Views: 2,343
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Forum: Amiga scene
03 April 2021, 00:48
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Replies: 29
Views: 2,262
'As soon as they could', would be when VGA...
'As soon as they could', would be when VGA appeared - and only in one resolution (320x200) with no blitter, no sprites, no copper etc. The CPU had to do it all - which made it much easier to program...
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Forum: Amiga scene
02 April 2021, 10:37
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Replies: 480
Views: 31,483
If an AGA A3000 had been released in 1991,...
If an AGA A3000 had been released in 1991, existing A3000 owners like me would have been pissed!
But it wasn't going to happen. Schematics for the prototype are dated 15th November 1991, which...
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Forum: Amiga scene
02 April 2021, 10:05
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Replies: 480
Views: 31,483
2.5" hard drives were not 'ridiculously'...
2.5" hard drives were not 'ridiculously' expensive. They cost a bit than typical 3.5" and 5.25" drives, but then so did SCSI drives (which Amiga users were used to having to pay extra for).
One...
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Forum: Coders. Asm / Hardware
01 April 2021, 21:13
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Replies: 73
Views: 3,693
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Forum: Amiga scene
01 April 2021, 20:19
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Replies: 480
Views: 31,483
Yep, if you just 'place' it over the CPU it can...
Yep, if you just 'place' it over the CPU it can be unreliable (had that problem with the Viper CPU board in my A600). The Vampire came with screws that clamp the board down to the motherboard. The...
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Forum: Amiga scene
01 April 2021, 19:33
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Replies: 480
Views: 31,483
Only if the 'fast' RAM is separated from the...
Only if the 'fast' RAM is separated from the ChipRAM bus. This was why the trapdoor memory in an OCS A500 is called 'slow' memory - it's connected to the ChipRAM bus so it is constrained to the same...
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Forum: Retrogaming General Discussion
01 April 2021, 08:53
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Replies: 194
Views: 9,610
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Forum: Coders. General
01 April 2021, 00:32
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Replies: 91
Views: 8,393
Proof? I already supplied proof that IBM was...
Proof? I already supplied proof that IBM was doing much better than Apple at the time in question, despite the PC Jr.
PS/2 and PS/1 didn't come until later.
IBM did screw up with the PS/2 for...
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Forum: Amiga scene
01 April 2021, 00:07
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Replies: 480
Views: 31,483
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Forum: Coders. Asm / Hardware
31 March 2021, 22:55
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Replies: 73
Views: 3,693
Not sure what you mean by that. To trace each...
Not sure what you mean by that. To trace each instruction as it is being executed you absolutely do need 'something special' to break out of the interpreter at the beginning or end of each...
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Forum: Coders. Asm / Hardware
31 March 2021, 16:55
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Replies: 73
Views: 3,693
Yes, that is what I meant. Perhaps an analogy...
Yes, that is what I meant. Perhaps an analogy might help get my point across - say I have a car that normally cruises at 100kph, but I put a gearbox in that slows it down to 10kph. If I had a way to...
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Forum: Amiga scene
31 March 2021, 00:34
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Replies: 480
Views: 31,483
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Forum: Coders. Asm / Hardware
30 March 2021, 21:42
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Replies: 73
Views: 3,693
Considering that everything is already being...
Considering that everything is already being slowed down by 1000% I wouldn't be concerned about an extra 10% - especially if it meant making things a lot less complicated - but that's just me.
I...
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Forum: Amiga scene
30 March 2021, 05:01
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Replies: 480
Views: 31,483
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Forum: Coders. Asm / Hardware
30 March 2021, 01:55
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Replies: 73
Views: 3,693
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Forum: Retrogaming General Discussion
28 March 2021, 16:29
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Replies: 194
Views: 9,610
Agreed. The first computer I had with an AY was...
Agreed. The first computer I had with an AY was the Amstrad CPC664, which did have stereo output on the headphone socket. It sounded much better when connected to a good stereo system than using the...
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Forum: Coders. Asm / Hardware
27 March 2021, 21:18
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Replies: 73
Views: 3,693
I did some testing on my A1200 with Blizzard...
I did some testing on my A1200 with Blizzard 1230-IV 50MHz 030 to see what execution speed can be expected. First I timed 50 million nops (a block of 1000 nops repeated 50,000 times) which took 3...
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Forum: Amiga scene
27 March 2021, 03:41
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Replies: 480
Views: 31,483
Very few games that were worth running on the...
Very few games that were worth running on the A600 required the numeric keypad, but many older games wouldn't work properly on a machine with a faster CPU or FastRAM (there were also a lot that...
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Forum: Retrogaming General Discussion
27 March 2021, 02:31
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Replies: 194
Views: 9,610
That would describe the SN76489...
That would describe the SN76489 (https://en.wikipedia.org/wiki/Texas_Instruments_SN76489), but the AY has more - its volume controls can be set to ramp automatically to produce sawtooth or triangle...
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Forum: Retrogaming General Discussion
27 March 2021, 01:41
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Replies: 194
Views: 9,610
And it doesn't have an AY either unless you add...
And it doesn't have an AY either unless you add the Speech/Sound cartridge (http://www.cocopedia.com/wiki/index.php/Speech/Sound_Cartridge_(26-3144A)). Standard CoCo sound is produced by a 6 bit DAC,...
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Forum: Coders. Asm / Hardware
26 March 2021, 11:19
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Replies: 73
Views: 3,693
Oh sorry, when you said "Release the code ?...
Oh sorry, when you said "Release the code ? Maybe, but it's too big to be suitable for a contest" I didn't realize you meant you wanted to keep it private.
Not sure what you mean by this. But...
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Forum: Amiga scene
26 March 2021, 10:47
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Replies: 480
Views: 31,483
The biggest problem with PCMCIA was that the...
The biggest problem with PCMCIA was that the standard wasn't finished 'at the time' and it was mostly only used in PC laptops that treated it like an ISA bus so properly implemented 'generic' cards...
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