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Search: Posts Made By: pandy71
Forum: support.Hardware Yesterday, 19:07
Replies: 2
Views: 74
Posted By pandy71
You can't reprogram those chips - they are truly...

You can't reprogram those chips - they are truly MASK ROM - Commodore ordered them from few companies - at the beginning (Kick <2) it was Japan (mostly Hitachi), later (Kick >2?) it was Macronix...
Forum: Hardware mods 10 June 2018, 14:01
Replies: 34
Views: 1,202
Posted By pandy71
This seem to be proper answer - usually this is...

This seem to be proper answer - usually this is button to start and if it keep pressed longer then it perform COLD shutdown (independent from OS).

I agree that 500W is ridiculous and usually...
Forum: support.Hardware 15 May 2018, 22:23
Replies: 9
Views: 284
Posted By pandy71
Not sure but perhaps original PSU using voltage...

Not sure but perhaps original PSU using voltage doubler - this is quite common for US/EU PSU's - they have switch to use PSU in voltage doubler or normal mode - if this is similar for this PSU then...
Forum: support.Other 15 May 2018, 17:08
Replies: 1
Views: 248
Posted By pandy71
If this monitor support CGA then it should work...

If this monitor support CGA then it should work with Amiga - use VGA input as it is proper input for video signal generated by Amiga (analog video) MDA, CGA, EGA are digital signals and they will...
Forum: support.Hardware 14 May 2018, 19:05
Replies: 12
Views: 519
Posted By pandy71
I didn't mean to insult anyone especially...

I didn't mean to insult anyone especially E-Penguin, well yes, i've tried to be funny and a bit of ironic (being from almost 20 years electronics engineer i've had impression that have some basic...
Forum: support.Hardware 13 May 2018, 14:39
Replies: 12
Views: 519
Posted By pandy71
Thank you. So please tell me what makes coil...

Thank you.

So please tell me what makes coil to whine?
Forum: support.Hardware 10 May 2018, 15:13
Replies: 12
Views: 519
Posted By pandy71
Well... please allow me to rewrite correctly your...

Well... please allow me to rewrite correctly your statement: you just ignored weird whining sound and despite malfunction tried to use PSU then after some time PSU just failed completely showing this...
Forum: support.Hardware 08 May 2018, 14:16
Replies: 12
Views: 519
Posted By pandy71
Do so and if sound will be still audible use 2...

Do so and if sound will be still audible use 2 compound resin (epoxy) glue - try to stabilize inductances (transformer and inductors) - few glue drops should be sufficient - after time there is very...
Forum: support.Hardware 07 May 2018, 22:59
Replies: 12
Views: 519
Posted By pandy71
On your side i would also check inductances,...

On your side i would also check inductances, usually those parts are responsible for audible sound not capacitors (capacitors may also produce sound but usually it is way weaker than sound produced...
Forum: Retrogaming General Discussion 30 March 2018, 21:38
Replies: 10
Views: 591
Posted By pandy71
You can also wisely use 16 colours CLUT and...

You can also wisely use 16 colours CLUT and prevent unwanted ramp propagation - CPU intensive but doable especially in time of Vampire and similar accelerators.
Perhaps skilled programmer can do...
Forum: Amiga scene 25 March 2018, 14:38
Replies: 12
Views: 679
Posted By pandy71
You just triggered my curiosity - it sounds like...

You just triggered my curiosity - it sounds like filesystem doesn't allow seek over file...? Is that true?
Forum: Amiga scene 24 March 2018, 16:49
Replies: 12
Views: 679
Posted By pandy71
You may have multiple chunks of data to reduce...

You may have multiple chunks of data to reduce this limitation or use smart resources utilization (small 2 or more buffers and read data from storage - looks like nowadays mass storage is no longer...
Forum: Amiga scene 24 March 2018, 13:19
Replies: 12
Views: 679
Posted By pandy71
For sure it is stereo and there are players (SoX,...

For sure it is stereo and there are players (SoX, ffplay for sure) capable to play 8SVX as stereo (raised bug on this for foobar 2000 https://hydrogenaud.io/index.php/topic,101588.msg838527.html...
Forum: support.Hardware 12 March 2018, 16:01
Replies: 12
Views: 530
Posted By pandy71
Hall sensor are foundation for speed control in...

Hall sensor are foundation for speed control in BLDC (efficiently they replacing mechanical commutator usually attached in fixed way to rotor) - you may control BLDC also using BEMF hover hall sensor...
Forum: Amiga scene 10 March 2018, 09:31
Replies: 202
Views: 21,601
Posted By pandy71
i've converted bellow pictures while ago...

i've converted bellow pictures while ago intentionally for Workbench MUI (colour standard palette + laced hires with small overscan) version - IMHO they looks nice so perhaps they may be useful for...
Forum: Coders. Releases 10 March 2018, 09:03
Replies: 37
Views: 2,056
Posted By pandy71
MPEG 1 Layer I is not used at all IMHO...

MPEG 1 Layer I is not used at all IMHO (practically used and also not directly in DCC as mutated version called PASC) - conformance official bitstreams are available here:...
Forum: Coders. Releases 08 March 2018, 01:52
Replies: 37
Views: 2,056
Posted By pandy71
Opus is merged vorbis + speex (both with...

Opus is merged vorbis + speex (both with improvements) - Opus has many faces (like low latency etc). And at least theoretically it is not affected by patents pool. Anyway mp3 is no longer covered by...
Forum: Coders. Releases 05 March 2018, 16:45
Replies: 37
Views: 2,056
Posted By pandy71
Nice, Thx Meynaf! Any plans for Opus?

Nice, Thx Meynaf! Any plans for Opus?
Forum: Nostalgia & memories 03 March 2018, 14:00
Replies: 51
Views: 2,222
Posted By pandy71
Yes man, Ensoniq use DCO (NCO) and use AWG as...

Yes man, Ensoniq use DCO (NCO) and use AWG as foundation for waveform generation (Paula is unable to skip samples in wavetables - it can only play faster or slower complete wavetable where Ensoniq...
Forum: Nostalgia & memories 02 March 2018, 18:31
Replies: 51
Views: 2,222
Posted By pandy71
DS DAC are as linear as signal can have one of...

DS DAC are as linear as signal can have one of two values. Oversampling is something else than linearity. From practical perspective DAC with SFDR like 110dB are feasible and practically used widely...
Forum: Nostalgia & memories 02 March 2018, 16:14
Replies: 51
Views: 2,222
Posted By pandy71
Properly sampled signal doesn't have overtones,...

Properly sampled signal doesn't have overtones, overtones can be created by DAC imperfections however some DAC's (like Sigma Delta) can be inherently linear so they don't create too much...
Forum: Nostalgia & memories 28 February 2018, 01:26
Replies: 51
Views: 2,222
Posted By pandy71
Having four channels is better than having pair...

Having four channels is better than having pair of two channel. Easy circuitry (digital) and channels can be mapped over L & R. I saw very good modules where two channels must be used to create...
Forum: Amiga scene 27 February 2018, 16:49
Replies: 177
Views: 6,003
Posted By pandy71
Cool is to run 32 bit Linux on no-MMU 8 bit...

Cool is to run 32 bit Linux on no-MMU 8 bit uController.
http://dmitry.gr/?r=05.Projects&proj=07.%20Linux%20on%208bit
If you have sufficient determination (time) you can do same on any HW.
Forum: Nostalgia & memories 27 February 2018, 10:33
Replies: 51
Views: 2,222
Posted By pandy71
Paula covers wide range of sampling rates (from...

Paula covers wide range of sampling rates (from 54 samples per second when AUDxPER=65535 to 1.79MHz) - technically is able to play infra-sounds (mHz i.e. mili Hertz) to way more than just ultrasound...
Forum: Hardware mods 27 February 2018, 10:19
Replies: 143
Views: 10,325
Posted By pandy71
Side to A4000 schematics don't forget about...

Side to A4000 schematics don't forget about original Commodore specifications for some IC's , i must say sadly that seem for some IC's there is no freely available specification (Super Buster, Ramsey...
Forum: Hardware mods 27 February 2018, 10:10
Replies: 143
Views: 10,325
Posted By pandy71
Minimig is A500 not accurate HW emulator - is...

Minimig is A500 not accurate HW emulator - is more like software emulator translated to HW (GCR in Paula doesn't work as it is not implemented). AFAIK there is only one accurate HW emulator for...
Forum: Amiga scene 26 February 2018, 19:56
Replies: 177
Views: 6,003
Posted By pandy71
Run emulated Amiga within Windows. There is no...

Run emulated Amiga within Windows. There is no added value trying to do reversed way (running Windows on Amiga) - it was quite popular to run PC software on Amiga in a past as hardware was very...
Forum: Hardware mods 26 February 2018, 11:02
Replies: 143
Views: 10,325
Posted By pandy71
Personally not recommend to use A4000 as...

Personally not recommend to use A4000 as reference - IMHO A1200 offer same benefits (Alice + Lisa) and it is way more simpler to design. Going for A4000 as reference mean that you will dedicate lot...
Forum: support.Hardware 24 February 2018, 10:30
Replies: 17
Views: 1,210
Posted By pandy71
This explain why i blindly agreed with 40 pin ROM...

This explain why i blindly agreed with 40 pin ROM (extension) - anyway sorry for previous comment :nuts . Thx Toni.
Forum: support.Hardware 23 February 2018, 19:37
Replies: 17
Views: 1,210
Posted By pandy71
Look above for my previous message re-edited - i...

Look above for my previous message re-edited - i was unable to re-edit message earlier due some database issue on EAB.
Sorry once again - i just follow your comment about 40 pin ROM and didn't check...
Forum: support.Hardware 23 February 2018, 17:52
Replies: 17
Views: 1,210
Posted By pandy71
Added after checking - Seem i was wrong :nuts -...

Added after checking - Seem i was wrong :nuts - Odd & Even are OK for CDTV board - they are located close to DMAC. U34 Even, U35 Odd. Sorry

Doubt that this is ROM issue.
bellow invalid feedback...
Forum: support.Hardware 22 February 2018, 19:15
Replies: 17
Views: 1,210
Posted By pandy71
Vibrations? After so many years this may be...

Vibrations?

After so many years this may be some connector issue (try to reconnect few times unpowered A570 and A500) - perhaps you need to clean both connectors (i mean PCB part and A570...
Forum: support.Hardware 22 February 2018, 18:46
Replies: 13
Views: 495
Posted By pandy71
No laugh on my side - first you trying to do...

No laugh on my side - first you trying to do working solution and it looks OK (many prototypes looks very similar) - second this is part of bigger discussion from other forum about people attitude...
Forum: support.Hardware 21 February 2018, 19:13
Replies: 17
Views: 1,210
Posted By pandy71
Check if both PSU's working correctly (A570...

Check if both PSU's working correctly (A570 require separate PSU and A500 require separate PSU). PSU for A570 and for A500 should be same (i mean they are interchangeable).
Forum: Amiga scene 21 February 2018, 18:45
Replies: 121
Views: 5,972
Posted By pandy71
Once again - can't confirm your complains on...

Once again - can't confirm your complains on caddy same of complains apply to tray (not opening, slow etc). CD caddy was very efficient protection method of CD disc. Plenty of SCSI drives was only...
Forum: support.Hardware 21 February 2018, 11:30
Replies: 13
Views: 495
Posted By pandy71
At first no problem - if i can help then i'm glad...

At first no problem - if i can help then i'm glad to do it.

RGB this is 3 signal - 3 different cables required, if you have separate H and V sync then additionally you need 2 more wires, combining...
Forum: Amiga scene 21 February 2018, 11:07
Replies: 121
Views: 5,972
Posted By pandy71
Well... market was not ready for this. We have...

Well... market was not ready for this. We have constantly same situation - i recall so called 3D TV (stereoscopy) - huge hype, 2 years vigorous marketing and lack of significant market penetrations...
Forum: support.Hardware 20 February 2018, 18:54
Replies: 13
Views: 495
Posted By pandy71
Composite sync on Amiga is available separately...

Composite sync on Amiga is available separately and it may be connected directly to dedicated composite sync input however in case of SyncOnGreen it should have IMHO 300mV level so i would strongly...
Forum: support.Hardware 20 February 2018, 18:45
Replies: 53
Views: 5,939
Posted By pandy71
Definitely you should check page 2-143 in...

Definitely you should check page 2-143 in provided by you Ramtron document. To fully use EDRAM you need to have dedicated memory controller that doesn't exist on Amiga.
Same for other special modes...
Forum: Amiga scene 20 February 2018, 18:15
Replies: 121
Views: 5,972
Posted By pandy71
Philips CDi was listed for 700$ when CDTV 999$ -...

Philips CDi was listed for 700$ when CDTV 999$ - CDi was superior to CDTV in terms of HW but lacked SW Amiga capabilities - perhaps this was main reason for pricey CDTV.




perhaps never - seem...
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