VOGONS


Amstrad Mega PC

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Reply 160 of 175, by Tiido

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Yeah, the gameport will remain operational. All other functions should too, unless the ALS or RTL are configured to collide with something.

T-04YBSC, a new YMF71x based sound card & Official VOGONS thread about it
Newly made 4MB 60ns 30pin SIMMs ~
mida sa loed ? nagunii aru ei saa 😜

Reply 161 of 175, by keropi

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phipscube wrote on 2021-09-22, 10:22:

[...]
I have a question... will the original Game port still work when adlib sound is disabled on the MD card?

the correct course of action would be to disable the amstrad adlib and use the OPL3 on Mega Card 😁
disabling the onboard adlib is very easy, lift pin19 of U1 74LS245 and connect it to pin20

uReKIMw.png

XWt6lWZ.jpg

cskwR4z.jpg

there are many mods one can do on the megadrive card to improve it...

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 162 of 175, by Zalog

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keropi wrote on 2021-09-21, 18:29:

the Mega Card is now a thing 😁

hope you like what you see

Looks fantastic - can't wait 😁 - btw will the connection from the scan doubler to the mega drive clock have a connector on the soundcard side so that they can be easily separated ?

Reply 163 of 175, by keropi

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Zalog wrote on 2021-09-23, 07:49:

Looks fantastic - can't wait 😁 - btw will the connection from the scan doubler to the mega drive clock have a connector on the soundcard side so that they can be easily separated ?

yes, it's just a 2pin header so it is detachable on the megacard side - on the amstrad side it needs to be soldered in 2 legs of the oscillator

also here are some pics of scanline modes - with added crappy photography from my cellphone 🤣

Md7VnAY.jpg

YB0nGY7.jpg

HNoINVp.jpg

zrvqnl8.jpg

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 164 of 175, by keropi

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here are some pics from Sonic 2 - it uses brighter colors so better for my phone:

rfWwesG.jpg

r4cv0oN.jpg

QPitJBq.jpg

JpdioT4.jpg

NT5VpnN.jpg

and here is how the card connects to the system:

nO71ctJ.jpg

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 165 of 175, by phipscube

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keropi wrote on 2021-09-23, 14:11:
here are some pics from Sonic 2 - it uses brighter colors so better for my phone: […]
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here are some pics from Sonic 2 - it uses brighter colors so better for my phone:

rfWwesG.jpg

r4cv0oN.jpg

QPitJBq.jpg

JpdioT4.jpg

NT5VpnN.jpg

and here is how the card connects to the system:

nO71ctJ.jpg

Looks awesome Keropi! Do you have an estimate on how much The Mega Card will cost? 😀

Reply 166 of 175, by keropi

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phipscube wrote on 2021-09-24, 11:23:

Looks awesome Keropi! Do you have an estimate on how much The Mega Card will cost? 😀

I want to say something like 200~220eur shipped?
it's not finished yet - some stuff are added and I actually want to see how much time I need to solder one of the final versions
availability will be pretty low and there is nothing I can do currently - main issue is the FPGA that is not stocked and if stocked the price is ridiculous. 😐

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 167 of 175, by Jo22

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keropi wrote on 2021-09-23, 14:11:

here are some pics from Sonic 2 - it uses brighter colors so better for my phone:

Here are some photos, too.
I tried to capture the same scene of the same game..

Not sure if they are useful, but maybe they serve as a comparison:
It's a PAL MegaDrive, connected via RF to an authentic, classic color tv (no remote), as it was still common in the late 80s to early 90s

Some kids which got "the old stuff" by their parents, friends or family members may have had such tvs in their bedroom, too.

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"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//

Reply 168 of 175, by keropi

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ah the classic RF setup... it does bring back memories!!!
very nice Jo22! 😀

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 169 of 175, by Jo22

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Glad to hear, you're welcome! ^^

I've taken a few more pictures with a true black/white TV (grayscale actually; rf signal) and a green monitor (composite signal; luma would be better).
- I've usen a few ferrites to get rid of noise, also.
It's astounding how clean an RF connection can be after spending a little bit of effort.
Maybe this helps or inspires other. Ferrites are no waste, I think.
(I assume some noise sneaks in via the power supplies. Makes me wonder how things would look if everything was battery powered.)

Hope that's okay. I do have a true video monitor (color, no tv) somewhere in the attic,
but I'm afraid this would be too much.. 😅

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"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//

Reply 170 of 175, by Jo22

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.. and here's the green monitor, too.
Such a thing was also called "data display" in the Apple II days, or so I heard.

The picture quality in this setup is a bit so and so.
The chroma signal shouldn't belong here, I know.
Unfortunately, I do have no console that's modded for s-video at hand.

Not sure of some of the patterns are the infamous vertical lines, or just the result of chroma signals.

Anyway, I just thought that this would be interesting to look at.
Since the tv+monitor was in reach, I thought "why not". 😅

Hope that's okay, I'll try to refrain from interfering for a while.

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"Time, it seems, doesn't flow. For some it's fast, for some it's slow.
In what to one race is no time at all, another race can rise and fall..." - The Minstrel

//My video channel//

Reply 171 of 175, by Zalog

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keropi wrote on 2021-09-24, 13:16:

I want to say something like 200~220eur shipped?
it's not finished yet - some stuff are added and I actually want to see how much time I need to solder one of the final versions
availability will be pretty low and there is nothing I can do currently - main issue is the FPGA that is not stocked and if stocked the price is ridiculous. 😐

It's a fantastic card, and its output looks excellent well done- definitely sign me up for one 😊. Don't worry about the time/parts delays, I think most of owners never dreamed that something like this would appear when we first got our megapc's, so we can definitely be patient 😁👍

Reply 172 of 175, by phipscube

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keropi wrote on 2021-09-24, 13:16:
I want to say something like 200~220eur shipped? it's not finished yet - some stuff are added and I actually want to see how muc […]
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phipscube wrote on 2021-09-24, 11:23:

Looks awesome Keropi! Do you have an estimate on how much The Mega Card will cost? 😀

I want to say something like 200~220eur shipped?
it's not finished yet - some stuff are added and I actually want to see how much time I need to solder one of the final versions
availability will be pretty low and there is nothing I can do currently - main issue is the FPGA that is not stocked and if stocked the price is ridiculous. 😐

That is reasonable 😀 my opinion is its probably best to wait until the worldwide shortages ease. I will certainly buy one off you when its ready so you can be sure of that. I'm actually quite amazed to see the card nearly finished already!

Reply 173 of 175, by keropi

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thanks for the kind words guys
well I do have 20x FPGAs already 😉
the lead time for any more ranges from 7 weeks to 46 weeks 🤣
we are just the bottom barrel fish, the fpgas that end up in the market are what are spared from buyers that get them by the thousands....

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33

Reply 175 of 175, by keropi

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I am not sure what IMGUR will do to the 11mb JPGs but I managed to get better crt pics 😀
I suggest you click on the direct links to get the full resolution of the pics

HujdSFch.jpg
https://i.imgur.com/HujdSFc.jpg

FmPIfVnh.jpg
https://i.imgur.com/FmPIfVn.jpg

8fogemAh.jpg
https://i.imgur.com/8fogemA.jpg

SlExC6Mh.jpg
https://i.imgur.com/SlExC6M.jpg

e2OUe7Wh.jpg
https://i.imgur.com/e2OUe7W.jpg

5owYeERh.jpg
https://i.imgur.com/5owYeER.jpg

🎵 PCMIDI mpu site
🎧 Orpheus soundcard site
Action Rewind site
💻 WTB Amstrad PC7486SLC-33