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Forum: Nostalgia & memories 09 October 2019, 21:08
Replies: 52
Views: 1,574
Posted By Gorf
Amiga (for me) was always about the joy of...

Amiga (for me) was always about the joy of home-computing, about the OS and the cool software, about gfx years ahead and only secondary about games - but we got some very innovative ones here too...
Forum: Nostalgia & memories 07 October 2019, 16:06
Replies: 2,364
Views: 351,948
Posted By Gorf
That is a good question ... it is used in the...

That is a good question ... it is used in the German layout for "#"

In the English layout there seems to be an other blank key next to the left shift-key...
That is used as "< >" in the German...
Forum: Coders. Asm / Hardware 12 September 2019, 08:55
Replies: 50
Views: 3,919
Posted By Gorf
Agnus does have that control: by putting the...

Agnus does have that control: by putting the address on the address-lines and triggering some glue logic via RGA it would tell the VRAM which ROW to store in the SAM registers.
Without any...
Forum: Coders. Asm / Hardware 12 September 2019, 00:05
Replies: 50
Views: 3,919
Posted By Gorf
I don’t think the color registers in VRAM are...

I don’t think the color registers in VRAM are working as a CLUT ... at least I can not imagine how this should work...

Here is a description by IBM that makes more sense:


...
Forum: Coders. Asm / Hardware 11 September 2019, 21:30
Replies: 50
Views: 3,919
Posted By Gorf
@Toni What exactly would speak against the...

@Toni

What exactly would speak against the theory "VRAM=ChipRam" in this case?
For the rest of the chipset it would make no difference to use VRAM as it would appear as usual DRAM - a second...
Forum: Coders. Asm / Hardware 08 September 2019, 19:16
Replies: 50
Views: 3,919
Posted By Gorf
That is for every single VRAM-IC as far as I...

That is for every single VRAM-IC as far as I unterstand.
So on a 16-bit system (in DRAM-Mode) you would use eg. 16 ICs in parallel - if you use 1Mbit chips, that would give you 2MB Chip-RAM...
So...
Forum: Coders. Asm / Hardware 08 September 2019, 14:26
Replies: 50
Views: 3,919
Posted By Gorf
I have to oppose that: I don't think it was...

I have to oppose that:
I don't think it was meant for am extra gfx-card, with separate VRAM, but for the use of VRAM as Chip-RAM. Hence the use of the RGA-bus.
It would add not too many additional...
Forum: Amiga scene 06 September 2019, 17:05
Replies: 190
Views: 16,125
Posted By Gorf
There is a nice synthesizer with full source code...

There is a nice synthesizer with full source code on Aminet:
http://aminet.net/package/mus/edit/harmonics

maybe you can get some inspiration from that one...

also:...
Forum: News 23 August 2019, 23:08
Replies: 13
Views: 1,562
Posted By Gorf
https://en.wikipedia.org/wiki/Power_ISA ...

https://en.wikipedia.org/wiki/Power_ISA

PowerPC ist part of it since 2006 if I understand this correctly. So it should be legal now to build a fully PPC compatible CPU - royalty free.
Forum: News 21 August 2019, 17:34
Replies: 13
Views: 1,562
Posted By Gorf
PPC Instruction Set Now Open Source

IBM is open sourcing the instruction set architecture of its Power family of processors. A FPGA softcore is already done and running on Xilinx.
...
Forum: Nostalgia & memories 17 August 2019, 03:34
Replies: 57
Views: 2,270
Posted By Gorf
Competition Pro ... I never used one of...

Competition Pro ...

I never used one of these Arcade Game Pads ... why is the joystick on the LEFT side??
I am right handed as most people and I simply can not imagine using my left hand for the...
Forum: News 14 August 2019, 18:19
Replies: 113
Views: 10,928
Posted By Gorf
Yes, that kind of things are exactly what I was...

Yes, that kind of things are exactly what I was talking about!

Sadly I do not see a cheap USB-Controller anywhere ... but on the other hand I am planning to get a ZZ9000 for my A3000, and this...
Forum: News 14 August 2019, 17:01
Replies: 113
Views: 10,928
Posted By Gorf
As long as it acts as a standard USB mass storage...

As long as it acts as a standard USB mass storage device and does not use any fancy protocols, it should also work with Amiga-USB-Conlollers like the Deneb....
Forum: News 14 August 2019, 16:53
Replies: 113
Views: 10,928
Posted By Gorf
We are talking about two different things ... I...

We are talking about two different things ... I assume, if you connect the Romulator via cable to a PC is appears as mass storage device. Same if you connect it to a Mac.

It should also appear on...
Forum: News 14 August 2019, 16:42
Replies: 113
Views: 10,928
Posted By Gorf
Again: why would I need a PC for that? It...

Again: why would I need a PC for that?

It should be possible, with a second Amiga with a USB-Card or even the same Amiga with a USB-Card eg. a Deneb.
Forum: News 14 August 2019, 14:57
Replies: 113
Views: 10,928
Posted By Gorf
but in #35 you wrote: So if you got a...

but in #35 you wrote:


So if you got a (second) USB-Card in your Amiga, you should be able to connect via that and do the same, shouldn't you?
Forum: Amiga scene 13 May 2019, 17:17
Replies: 92
Views: 8,472
Posted By Gorf
Show me the Tabor or the X5000... Ok, you are...

Show me the Tabor or the X5000...
Ok, you are not interested in these, but here at least the software developers have access to the source-code.

How should Cloanto be able to help any "classic"...
Forum: Coders. Asm / Hardware 05 April 2019, 04:19
Replies: 306
Views: 34,455
Posted By Gorf
Phone me NOW!!! :D

Phone me NOW!!! :D
Forum: Amiga scene 01 April 2019, 20:25
Replies: 65
Views: 10,298
Posted By Gorf
SID2 is awesome! Simply the best. (hacked my...

SID2 is awesome! Simply the best.
(hacked my version to work with custom screen modes..)

Sadly the author, Timm Martin, died way to young back in the 90s :-/
Forum: Coders. Asm / Hardware 26 March 2019, 22:09
Replies: 66
Views: 3,087
Posted By Gorf
The more registers the slower the access time. ...

The more registers the slower the access time.
This "register" would be 192KB ...

To access a value you would need a 16bit address - so you would use a 16bit deep screen mode to provide 24bit...
Forum: Coders. Asm / Hardware 26 March 2019, 18:31
Replies: 66
Views: 3,087
Posted By Gorf
not sure if I understand you here correctly.... ...

not sure if I understand you here correctly....
I guess you do not mean 32 thousand registers, do you? But 15bit wide registers that allow 32k different values?

Would limiting the copper to...
Forum: Amiga scene 23 March 2019, 18:40
Replies: 206
Views: 14,683
Posted By Gorf
Setback for Cloanto and small win for Hyperion: ...

Setback for Cloanto and small win for Hyperion:
Hyperion successfully prevents Cloanto from registering "workbench" trademark in the EU....
Forum: Coders. Asm / Hardware 23 March 2019, 17:59
Replies: 27
Views: 1,737
Posted By Gorf
http://www.chibiakumas.com/68000/ The page...

http://www.chibiakumas.com/68000/

The page looks way too colorful and ugly, but the information might be what you are looking for.
Especially since there are plenty of comparisons to 8-bit asm,...
Forum: Coders. Asm / Hardware 23 March 2019, 17:02
Replies: 27
Views: 1,737
Posted By Gorf
"Have do you break it down as a noob" ...

"Have do you break it down as a noob"

Languages are not always easy ... e.g. your thread title produces a severe syntax error in my brain.
Forum: Coders. Asm / Hardware 21 March 2019, 14:57
Replies: 29
Views: 1,588
Posted By Gorf
With bcd you need just one counter.... and just...

With bcd you need just one counter.... and just one sbcd instruction per frame.
Forum: Coders. Asm / Hardware 20 March 2019, 13:51
Replies: 29
Views: 1,588
Posted By Gorf
How about using Binary Coded Decimal on the 020...

How about using Binary Coded Decimal on the 020 for your timer and subtract 2 centiseconds every frame?

sbdc #2,d0

(time measured in centiseconds, but not showing the 1/10 and 1/000 on the...
Forum: Amiga scene 19 March 2019, 17:47
Replies: 206
Views: 14,683
Posted By Gorf
@ Thomas “Intellectual property rights...

@ Thomas

“Intellectual property rights include patents, copyright, industrial design rights, trademarks, plant variety rights, trade dress, geographical indications, and in some jurisdictions...
Forum: Coders. Asm / Hardware 19 March 2019, 17:26
Replies: 29
Views: 1,588
Posted By Gorf
(1/64)+(1/256)+(1/2048) = 0.02 Is that close...

(1/64)+(1/256)+(1/2048) = 0.02
Is that close enough to 1/50 = 0.02 ?
;-)

(1/64)+(1/1024)=0.0166
1/60 = 0.016666
Forum: Amiga scene 19 March 2019, 00:16
Replies: 206
Views: 14,683
Posted By Gorf
so for what reason ever you refuse to count 3.5...

so for what reason ever you refuse to count 3.5 and 3.9 as updates ... but do so for 3.1.4. Are you aware that many things are just back ports from 3.9 (and even 4.x?)

And Hyperion did not...
Forum: Amiga scene 18 March 2019, 16:40
Replies: 206
Views: 14,683
Posted By Gorf
no need to call it an obsession ... Olafs post...

no need to call it an obsession ...
Olafs post was very moderately considering the the one he answered to.



"big"? No disrespect to the coders, but it is mainly a bugfix release and was...
Forum: Coders. Asm / Hardware 17 March 2019, 18:30
Replies: 66
Views: 3,087
Posted By Gorf
Yes but that would only give you one split from...

Yes but that would only give you one split from top to bottom (unless you change things with the copper...)

It would be nicer if DDFWRAP could also take a start line and end line - there should be...
Forum: Coders. Asm / Hardware 17 March 2019, 18:12
Replies: 66
Views: 3,087
Posted By Gorf
good enough is relative, but that is a valid...

good enough is relative, but that is a valid point.
I somehow did not think of reducing the resolution below low-res....



right.



yes.
Forum: Coders. Asm / Hardware 17 March 2019, 03:46
Replies: 66
Views: 3,087
Posted By Gorf
good idea! I do not think it would be to...

good idea!
I do not think it would be to expensive ... only problem might be some kind of instability or the possibility to stall the copper forever? not sure..



or at least simple...
Forum: Coders. Asm / Hardware 17 March 2019, 03:22
Replies: 66
Views: 3,087
Posted By Gorf
@ Megol, bloodline but the bandwidth on...

@ Megol, bloodline

but the bandwidth on OCS/ECS would be maxed out with a 8bit chunky mode in low-res - as it would with 8 bitplanes ...
So during the screen-time everything else would be...
Forum: Coders. Asm / Hardware 16 March 2019, 01:29
Replies: 66
Views: 3,087
Posted By Gorf
As Bloodline explained ... it needs to read the...

As Bloodline explained ... it needs to read the next instruction from RAM.
So a way around that would be sort of cache or internal copper RAM to store a copper-list ... but that would limit the size...
Forum: Coders. Asm / Hardware 15 March 2019, 21:41
Replies: 66
Views: 3,087
Posted By Gorf
the benefit of this ST way of fetching data is...

the benefit of this ST way of fetching data is simply that you do not need to jump around in memory and only need one pointer to the start of your screen.
All is read in a consecutive way...

This...
Forum: Coders. Asm / Hardware 15 March 2019, 19:46
Replies: 66
Views: 3,087
Posted By Gorf
next idea, that would be "easy" to implement:...

next idea, that would be "easy" to implement: mirrored sprites.

As sprites are (line-wise) read before the other display data and stored in buffers, it should be not too hard to change the...
Forum: Coders. Asm / Hardware 15 March 2019, 19:20
Replies: 66
Views: 3,087
Posted By Gorf
As Photon pointed out: the ST stores the screen...

As Photon pointed out: the ST stores the screen in interleaved bitplanes (word aligned) - so 16 bit of the first plane, than 16 bit of the second and so on.
To get the first pixel of a 16 colour...
Forum: Coders. Asm / Hardware 15 March 2019, 19:14
Replies: 66
Views: 3,087
Posted By Gorf
good point and it would have been easy to...

good point and it would have been easy to implement for the data fetching part... but little bit more complicates for some bitter operations.
Only really useful for ST compatibility, or am I missing...
Forum: Coders. Asm / Hardware 15 March 2019, 19:11
Replies: 66
Views: 3,087
Posted By Gorf
I described that same Idea above ;) The Apple...

I described that same Idea above ;)
The Apple IIgs (1986) had such a mode.



chips - no they come out of the kitchen made from potatoes :D
FPGAs are still kind of magical, aren't they?
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