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Search took 0.02 seconds. Search: Posts Made By: chb
Forum: Amiga scene 02 April 2023, 16:13
Replies: 3,819
Views: 509,661
Posted By chb
Any evidence for that? I guess it's a pretty...

Any evidence for that? I guess it's a pretty pessimistic estimate for the 6510 alone.


SID: You can emulate it; but quality is between not great but acceptable (simple standard stuff) and...
Forum: Amiga scene 02 April 2023, 15:42
Replies: 3,819
Views: 509,661
Posted By chb
Well, that still needs a new VIC revision, and...

Well, that still needs a new VIC revision, and your dual-ported line buffers probably weren't that simple to realize in 1985... one could probably double-buffer that line, probably that would be even...
Forum: Amiga scene 02 April 2023, 11:03
Replies: 3,819
Views: 509,661
Posted By chb
I think you are massively underestimating the...

I think you are massively underestimating the neccessary effort and overestimating the benefits. How do you think that integration would work? The VIC II does not have RGB output, it even does not...
Forum: Amiga scene 10 March 2023, 13:04
Replies: 3,819
Views: 509,661
Posted By chb
No, that's not true for early Atari TOS versions,...

No, that's not true for early Atari TOS versions, the incompatibility has nothing to do with the boot code. Look here...
Forum: Amiga scene 07 March 2023, 11:08
Replies: 3,819
Views: 509,661
Posted By chb
The sidecar at least did allow the user to share...

The sidecar at least did allow the user to share a monitor, keyboard and mouse between Amiga & PC, facilitated data transfer between those two sides etc. The C64s architecture (and the tendency of...
Forum: Amiga scene 26 February 2023, 08:07
Replies: 3,819
Views: 509,661
Posted By chb
The problem was that Commodore saved a dollar on...

The problem was that Commodore saved a dollar on their entry-level A1200s without HD, but had to raise the price by hundreds of dollars for the HD models because of the 2.5" drive. It made the HD...
Forum: Amiga scene 17 February 2023, 20:32
Replies: 3,819
Views: 509,661
Posted By chb
I haven't found any clear documentation on this...

I haven't found any clear documentation on this (in English at least), but for me it does not look like a general blitter-like device (there's clearly a very limited number of control registers), but...
Forum: Amiga scene 17 February 2023, 15:53
Replies: 3,819
Views: 509,661
Posted By chb
The X68000 had impressive gfx capabilities for...

The X68000 had impressive gfx capabilities for its time, no question, but it was essentially modeled after the consoles/arcade boards of that time (albeit more powerful than the former), plus some...
Forum: Amiga scene 07 February 2023, 18:10
Replies: 3,819
Views: 509,661
Posted By chb
I am not completely sure what's the point of your...

I am not completely sure what's the point of your question, but no, except for some theoretical scenario (code running in the cache most of the time) running the blitter stalls the 020. Having a...
Forum: Amiga scene 07 February 2023, 16:04
Replies: 3,819
Views: 509,661
Posted By chb
Chip mem isn't that slow from the chipset (Lisa)...

Chip mem isn't that slow from the chipset (Lisa) side because of 32 bit + double CAS, giving a bandwidth of ~28 MB/s for the graphics chip. The CPU cannot use the latter feature and has access only...
Forum: Amiga scene 06 February 2023, 18:23
Replies: 3,819
Views: 509,661
Posted By chb
Probably two reasons. First, ECS was...

Probably two reasons.


First, ECS was probably internally a rather modest update to OCS, while changing from NMOS to CMOS would have required a redesign. Also, the 6502 is probably a more complex...
Forum: Amiga scene 10 April 2020, 19:03
Replies: 3,819
Views: 509,661
Posted By chb
It's exactly what the most successful consolo of...

It's exactly what the most successful consolo of that era, the NES, does - the PPU has analog on-chip composite out, as written already earlier. Were Nintendo/Ricoh engineers "plenty crazy"?
And...
Forum: Amiga scene 10 April 2020, 12:43
Replies: 3,819
Views: 509,661
Posted By chb
Yep, and that's him talking about the NTSC...

Yep, and that's him talking about the NTSC composite signal generation. Nothing lunatic about having it on-chip for a game console/home computer that is connected to a TV set - as written earlier, a...
Forum: Amiga scene 07 April 2020, 14:30
Replies: 3,819
Views: 509,661
Posted By chb
AFAIU they were planning to put NTSC composite...

AFAIU they were planning to put NTSC composite signal generation on-chip, which is in fact a very reasonable choice for a game console. The PPU in the NES/Famicom has analog composite out, the VIC-II...
Forum: Amiga scene 05 April 2020, 22:27
Replies: 3,819
Views: 509,661
Posted By chb
That's possible, but I rather think the quoted "7...

That's possible, but I rather think the quoted "7 bitplanes" or sometimes even "128 colors" are a misunderstanding that stems from the fact that ECS has 7 bitplane pointer registers - six for the...
Forum: Amiga scene 05 April 2020, 20:53
Replies: 3,819
Views: 509,661
Posted By chb
Well, following your logic she would mention that...

Well, following your logic she would mention that she has the complete schematics, right? Fact is, we do not know.


Please read my edit. Meaning people from Los Gatos had them and passed them to...
Forum: Amiga scene 05 April 2020, 18:41
Replies: 3,819
Views: 509,661
Posted By chb
While Jeri Ellsworth indeed showed some...

While Jeri Ellsworth indeed showed some schematics in a video, AFAIK it is unknown whether a) those are for the actual chips or something from an earlier stage of development, and b) if she has the...
Forum: Amiga scene 30 March 2020, 20:50
Replies: 3,819
Views: 509,661
Posted By chb
I think you're overlooking one important point:...

I think you're overlooking one important point: Changing to the newer obsolete fab would have meant a change to CMOS instead of the NMOS/HMOS process used. That means a complete redesign of the chip,...
Forum: Amiga scene 27 March 2020, 10:51
Replies: 3,819
Views: 509,661
Posted By chb
In 1997 a Playstation was $149, a SNES $99. I...

In 1997 a Playstation was $149, a SNES $99. I doubt Commodore could have been able to cover the production costs at those prices, and they weren't in a situation to sell at a big loss and hope to...
Forum: Amiga scene 02 February 2020, 17:19
Replies: 3,819
Views: 509,661
Posted By chb
That's certainly a valid aspect; also all other...

That's certainly a valid aspect; also all other integrated-keyboard computers of that time that I'm aware of with internal HDD had 2.5" internal drives (Atari Falcon 030, A600/A1200, Acorn A3020), so...
Forum: Amiga scene 01 February 2020, 18:53
Replies: 3,819
Views: 509,661
Posted By chb
That definitely never ever happened. ;) Joking...

That definitely never ever happened. ;)
Joking aside, 2.5" drives were more shockproof, because they were made for laptops and had smaller discs; but unless you were dropping your Amiga regularly...
Forum: Amiga scene 01 February 2020, 14:10
Replies: 3,819
Views: 509,661
Posted By chb
I think it was a terrible idea. I had a 3.5"...

I think it was a terrible idea. I had a 3.5" drive running outside my A1200 in a wooden box, having to cut the case slightly to get the IDE cable out, while the power came from an Y-adapter to the...
Forum: Amiga scene 27 October 2019, 18:12
Replies: 3,819
Views: 509,661
Posted By chb
I totally agree with you that recording samples...

I totally agree with you that recording samples in 8 bit is very difficult, as you need perfect recording levels not to loose even more of the already limited dynamic range. However, that does not...
Forum: Amiga scene 27 October 2019, 13:49
Replies: 3,819
Views: 509,661
Posted By chb
On the Amiga when using four channels in tracked...

On the Amiga when using four channels in tracked music, you have additional 6 bits for volume per channel, so best practice is using samples normalized to 100% volume and then use the volume...
Forum: Amiga scene 17 August 2019, 13:38
Replies: 3,819
Views: 509,661
Posted By chb
Never released, but planned (in cooperation with...

Never released, but planned (in cooperation with Sony and later Phillips):
https://en.wikipedia.org/wiki/Super_NES_CD-ROM

You cannot compare that directly, as the Amiga was not limited to sprites...
Forum: Amiga scene 17 August 2019, 12:44
Replies: 3,819
Views: 509,661
Posted By chb
That's a bit of a skewed comparison. The big...

That's a bit of a skewed comparison. The big difference is the amount of data needed: On the MD, a complete screen is 2k for character ram (1 playfield 16 colors, 320x200), and 32k on the Amiga, 15x...
Forum: Amiga scene 23 July 2019, 23:03
Replies: 3,819
Views: 509,661
Posted By chb
Yep, let's leave it at that.:) Would be...

Yep, let's leave it at that.:)

Would be great, but I fear it would neither help your time management nor mine. :D

If you refer to the AAA documentation: They describe pretty non-overlapping...
Forum: Amiga scene 22 July 2019, 22:48
Replies: 3,819
Views: 509,661
Posted By chb
No problem, good idea. Haynie is clearly...

No problem, good idea.

Haynie is clearly very enthusiastic about the Amiga (and the opposite about C= management), but in general not known for outrageous claims. My intention was to analyze what...
Forum: Amiga scene 20 July 2019, 18:08
Replies: 3,819
Views: 509,661
Posted By chb
Sorry, I think my statement was slightly...

Sorry, I think my statement was slightly confusing. VRAM has two ports: The DRAM port (that is addressed like standard DRAM) and a read-only video port. So for CPU and Blitter operations, VRAM and...
Forum: Amiga scene 20 July 2019, 15:21
Replies: 3,819
Views: 509,661
Posted By chb
[/QUOTE] It's the way VRAM works: At a single...

[/QUOTE]
It's the way VRAM works: At a single read access, a whole row (typically 1024 bits) is copied into an internal buffer, which is then output on the second port with an independent clock,...
Forum: Amiga scene 19 July 2019, 18:26
Replies: 3,819
Views: 509,661
Posted By chb
I also do not see how the 400-600 MB/s figure is...

I also do not see how the 400-600 MB/s figure is reached, however the linked document shows that it's not that far fetched: The dual VRAM system can do 1280x1024 in "chunky" mode (which is 16 bit per...
Forum: Amiga scene 18 July 2019, 13:07
Replies: 3,819
Views: 509,661
Posted By chb
Yes, in some way. The graffiti took the digital...

Yes, in some way. The graffiti took the digital RGBI from the Amiga's video connector and fed it to a RAMDAC (probably a generic VGA one), the palette data was transferred during some blanked...
Forum: Amiga scene 16 July 2019, 14:55
Replies: 3,819
Views: 509,661
Posted By chb
While the Archimedes is indeed impressive,...

While the Archimedes is indeed impressive, especially considering it gets its power from considerable simpler chips (CPU, VIDC, MEMC) than those in the A500, the specs do not tell the whole truth....
Forum: Amiga scene 07 July 2019, 23:58
Replies: 3,819
Views: 509,661
Posted By chb
But the Jaguar is a cartridge based system, so it...

But the Jaguar is a cartridge based system, so it would not need to load graphical assets and code into RAM? I think it's not fair to compare a disk-based and a cartridge-based system with the same...
Forum: Amiga scene 07 July 2019, 18:57
Replies: 3,819
Views: 509,661
Posted By chb
To be fair, that's more because Akiko is a really...

To be fair, that's more because Akiko is a really crappy solution for a chunky mode (read chunky data with the CPU, write chunky data to the Akiko registers with the CPU, read planar back with the...
Forum: Amiga scene 07 July 2019, 15:49
Replies: 3,819
Views: 509,661
Posted By chb
I think Sandruzzo is wrong here (if I understand...

I think Sandruzzo is wrong here (if I understand him correctly) - copper writes to hardware registers take exactly as many dma cycles as are needed to read the two words for address and value from...
Forum: Amiga scene 03 July 2019, 18:59
Replies: 3,819
Views: 509,661
Posted By chb
I'm not arguing that no one could have foreseen...

I'm not arguing that no one could have foreseen the need for a chunky mode, but hovertank and catacomb were EGA, which is planar, and Wolfenstein is from 1992, same year when AGA was released. But...
Forum: Amiga scene 01 July 2019, 13:05
Replies: 3,819
Views: 509,661
Posted By chb
I liked the A1200 - was my first Amiga after...

I liked the A1200 - was my first Amiga after using a PC/XT. And I remember it was received rather positively in the press at that time. And while it was not revolutionary, it was a quite well-rounded...
Showing results 1 to 38 of 38

 
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