Forum: support.Hardware
25 February 2021, 14:26
|
|
Replies: 10
Views: 401
Can't argue beyond fact that i don't have CDTV...
Can't argue beyond fact that i don't have CDTV service manual covering this board. Only video slot is provided on schematics.
I may assume that CDTV video board is somehow similar to Commodore...
|
|
Forum: Coders. Asm / Hardware
24 February 2021, 23:20
|
|
Replies: 21
Views: 1,042
Honestly... it is not possible unless you have...
Honestly... it is not possible unless you have reliable external frequency source not linked with system clock - proper NTSC and proper PAL are using different system clock and Horizontal timing is...
|
|
Forum: support.Hardware
24 February 2021, 23:16
|
|
Replies: 10
Views: 401
Use SCART standard (EN50049 attached) as...
Use SCART standard (EN50049 attached) as reference.
It is not possible to have short circuit if everything is properly connected - verify (double, triple or more if necessary) your pin numbering...
|
|
Forum: support.Hardware
23 February 2021, 01:53
|
|
Replies: 10
Views: 401
i've read your SCART cable description -...
i've read your SCART cable description - something is wrong - you need feed Amiga CSYNC to pin 20 in SCART (Composite Video Input), RGB signals shall be feed to pins 7 (Blue), 11 (Green), 15 (Red),...
|
|
Forum: Hardware mods
22 February 2021, 22:45
|
|
Replies: 3
Views: 269
|
|
Forum: support.Hardware
22 February 2021, 22:38
|
|
Replies: 10
Views: 387
|
|
Forum: support.Hardware
22 February 2021, 22:21
|
|
Replies: 10
Views: 401
|
|
Forum: Coders. Asm / Hardware
10 February 2021, 13:38
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
10 February 2021, 01:37
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 17:27
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 16:49
|
|
Replies: 296
Views: 9,791
This is 16 bit wav, mono, with sample rate...
This is 16 bit wav, mono, with sample rate 27710Hz so it can be played directly on Amiga with regular OCS screen and regular DMA (after conversion to 14 bit either 8 bit) - sine wave was coded as 15...
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 16:12
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 15:35
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 14:20
|
|
Replies: 234
Views: 13,597
With proper lowpass filter (based on...
With proper lowpass filter (based on Gerzon-Craven noise shaping theorem we have more than 7..8kHz band free to be used by aggressive noise shaping) this approach should provide better results than...
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 13:44
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 12:10
|
|
Replies: 296
Views: 9,791
|
|
Forum: Coders. Asm / Hardware
09 February 2021, 11:44
|
|
Replies: 296
Views: 9,791
There is 65 levels from Max to null....
There is 65 levels from Max to null. http://amiga-dev.wikidot.com/hardware:audxvol - special coder (mapper) should use approach where one DAC is free from PWM and remain fraction is PWM active - with...
|
|
Forum: Coders. Asm / Hardware
08 February 2021, 15:11
|
|
Replies: 234
Views: 13,597
He is confused not getting exact frequency from...
He is confused not getting exact frequency from 44100Hz source WAV as he ignore inability of Paula to get exact 44100Hz play out rate... (as i pointed earlier this will require sample rate conversion...
|
|
Forum: Coders. Asm / Hardware
14 January 2021, 22:17
|
|
Replies: 234
Views: 13,597
|
|
Forum: Coders. Asm / Hardware
13 January 2021, 02:37
|
|
Replies: 234
Views: 13,597
|
|
Forum: support.Hardware
10 January 2021, 22:55
|
|
Replies: 4
Views: 265
|
|
Forum: Amiga scene
09 January 2021, 22:27
|
|
Replies: 139
Views: 17,482
Well - it could be made similarly as simple BBD...
Well - it could be made similarly as simple BBD only digital - around 70 - 80k of transistors - also CBM could use process with higher density similarly to Lisa (HP source) - in fact integrate Agnus,...
|
|
Forum: Amiga scene
08 January 2021, 22:01
|
|
Replies: 139
Views: 17,482
In theory there is simple workaround for...
In theory there is simple workaround for mentioned bus timing limitation - using invisible video lines time to transfer (in bursts / bulk) Audio data (and store it internally in Paula in some kind of...
|
|
Forum: Amiga scene
08 January 2021, 00:06
|
|
Replies: 139
Views: 17,482
Nope, sound and disk are linked to horizontal...
Nope, sound and disk are linked to horizontal frequency and as fundamental principle for Amiga - everything related to system timing is tightly coupled with color subcarrier frequency (video signal)....
|
|
Forum: Amiga scene
07 January 2021, 00:42
|
|
Replies: 139
Views: 17,482
My assumption is that before Commodore purchase...
My assumption is that before Commodore purchase and even after Amiga existed as a bunch of PCB's with plenty of PAL + TTL so later, when silicon was created, all conversion was required anyway due...
|
|
Forum: support.Hardware
05 January 2021, 19:57
|
|
Replies: 7
Views: 470
|
|
Forum: Amiga scene
05 January 2021, 19:19
|
|
Replies: 139
Views: 17,482
Agree but only to some point - SID already...
Agree but only to some point - SID already existed so some concepts from SID could be moved to Paula (like NCO) - and 16 bit counter vs 16 bit NCO was not so different in terms of complexity and even...
|
|
Forum: Amiga scene
05 January 2021, 18:39
|
|
Replies: 139
Views: 17,482
Paula is quite OK but lot of possibilities are...
Paula is quite OK but lot of possibilities are lost, firstly frequency resolution is too coarse on useful range and too high where it is not useful at all (fine frequency resolution on very low...
|
|
Forum: Hardware mods
24 December 2020, 16:01
|
|
Replies: 4
Views: 1,182
You can do anything with FPGA but what with...
You can do anything with FPGA but what with software? You can for example place local RAM for Copperlist and thus eliminate some of the limitations, you can internally work with higher clock...
|
|
Forum: Nostalgia & memories
19 October 2020, 01:11
|
|
Replies: 312
Views: 18,246
State of graphic was strictly related with...
State of graphic was strictly related with lithography of those times, thanks to Ronald Reagan decision about starting so called "star wars" a lot of money was pumped to create lithography below 1um...
|
|
Forum: Nostalgia & memories
12 October 2020, 20:05
|
|
Replies: 292
Views: 14,693
I miss on PC "RAD:" - AFAIK there is no (in...
I miss on PC "RAD:" - AFAIK there is no (in modern PC world) RAD-like solution - also "RAM:" implementations are way more limited (albeit when compared to "RAD:" at least their exist).
Luckily to...
|
|
Forum: Nostalgia & memories
28 September 2020, 00:15
|
|
Replies: 312
Views: 18,246
Pointless discussion - Amiga provided bit...
Pointless discussion - Amiga provided bit blitting and line drawing as standard, supported by OS and reasonable price for mass market - workstations, particularly those graphical was never tailored...
|
|
Forum: Coders. Asm / Hardware
27 September 2020, 23:57
|
|
Replies: 32
Views: 2,492
AFAIR there was alternative solution to provide...
AFAIR there was alternative solution to provide HD without slowing down floppy RPM - DRAM buffer was used to store track during R/W operations - from Amiga perspective this will be fully transparent...
|
|
Forum: support.Hardware
20 August 2020, 00:19
|
|
Replies: 17
Views: 867
Go for cheap ARM MCU with embedded ADC, most of...
Go for cheap ARM MCU with embedded ADC, most of them are over 10 -12 bit resolution (some are equipped with two or more simultaneously sampling ADC's so stereo is possible without phase issues) and...
|
|
Forum: Amiga scene
14 July 2020, 15:53
|
|
Replies: 199
Views: 19,423
|
|
Forum: Nostalgia & memories
31 October 2019, 20:39
|
|
Replies: 113
Views: 10,097
|
|
Forum: Amiga scene
20 October 2019, 18:30
|
|
Replies: 41
Views: 6,406
No added value - AAA if egver exist for real...
No added value - AAA if egver exist for real would be a dead end for Amiga graphics... just few interesting features (32 bit Copper with more functionality, perhaps HAM10, above this nothing special)...
|
|
Forum: Coders. Asm / Hardware
20 October 2019, 18:23
|
|
Replies: 21
Views: 2,183
|
|
Forum: Coders. Asm / Hardware
20 October 2019, 13:29
|
|
Replies: 21
Views: 2,183
|
|
Forum: Coders. Asm / Hardware
14 October 2019, 00:58
|
|
Replies: 21
Views: 2,183
I've tried many years ago - it was fail (from...
I've tried many years ago - it was fail (from strange effects on particular horizontal lines to complete hang on Amiga) - but my knowledge was very limited (no information about details of Amiga...
|
