Author Topic: Galaxy & Zen80 boards  (Read 2446 times)

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Offline remax

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Re: Galaxy & Zen80 boards
« Reply #25 on: 11:35, 29 June 18 »
Probably about 320KB + 64KB baseram = 384KB total, maybe I can spare another 64 KB. Will see in the end how much is left.
FDC + disk drive will not be firmware compatible with gotek/flashfloppy/hxc, as it's very different implementation on the FDC level. No display (don't have any spare gpio).
WiFi for network, USB (wireless) for Keyboard & mouse.


How would it be plugged in the GX4000 ? Internally or Externally ?

Online Duke

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Re: Galaxy & Zen80 boards
« Reply #26 on: 16:13, 29 June 18 »

How would it be plugged in the GX4000 ? Internally or Externally ?

It is mounted internally. I updated the first post with pictures of this.
First the Z80 cpu is unplugged, then you plug it into the galaxy board and the galaxy board into the z80 socket on the motherboard.

Offline tjohnson

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Re: Galaxy & Zen80 boards
« Reply #27 on: 17:42, 29 June 18 »
Got to say this is an excellent and exciting project for the amstrad community!

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Offline MikeSDK

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Re: Galaxy & Zen80 boards
« Reply #28 on: 16:35, 09 July 18 »
It is mounted internally. I updated the first post with pictures of this.
First the Z80 cpu is unplugged, then you plug it into the galaxy board and the galaxy board into the z80 socket on the motherboard.

I am of course intrigued, but I have a burning question: could you mount this internally in a regular 6128 as well or would it be too cramped with the keyboard right above it?

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Re: Galaxy & Zen80 boards
« Reply #29 on: 16:43, 09 July 18 »
I am of course intrigued, but I have a burning question: could you mount this internally in a regular 6128 as well or would it be too cramped with the keyboard right above it?

It probably could (I did not check yet). I am worried the metalplate from the keyboard will impact the WiFi signal too much. It remains to be tested, as of now it sits in my 464, with wires all over so I am not testing it until I am done with debugging.

Offline bazza_666

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Re: Galaxy & Zen80 boards
« Reply #30 on: 21:56, 09 July 18 »
Want one!!!!


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Offline Skunkfish

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Re: Galaxy & Zen80 boards
« Reply #31 on: 23:44, 09 July 18 »
Very excited by this. Would it be controllable via a web interface like the M4 board? Fancy using my mobile phone as a .DSK/cart image selector...
« Last Edit: 23:50, 09 July 18 by Skunkfish »

Online Duke

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Re: Galaxy & Zen80 boards
« Reply #32 on: 00:30, 10 July 18 »
Very excited by this. Would it be controllable via a web interface like the M4 board? Fancy using my mobile phone as a .DSK/cart image selector...
Yup, similar to M4.

Offline Phantomz

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Re: Galaxy & Zen80 boards
« Reply #33 on: 17:20, 10 July 18 »
@Duke

Nice work  8)

Looking forward to getting one of these in the future if you release them.  :)

Will it work ok with the C4CPC cart plugged in, I mean will they both work ok together, also what about the power supply needed, I know people needed o get a new power supply if they use the C4CPC in a GX4000.

Offline ASiC

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Re: Galaxy & Zen80 boards
« Reply #34 on: 19:35, 10 July 18 »

@Phantomz
Either you have a C4CPC or not, get rid off that nasty PSU and get yourself a new one!


Lots of GXs had died a painful death because of that piece of crap!




Offline Phantomz

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Re: Galaxy & Zen80 boards
« Reply #35 on: 19:56, 10 July 18 »
@Phantomz
Either you have a C4CPC or not, get rid off that nasty PSU and get yourself a new one!


Lots of GXs had died a painful death because of that piece of crap!

@ASiC

I've got a good power supply from RS Components for my GX4000 as soon as I got my C4CPC.

I'm asking if this new board might need a better supply than the original one for people that haven't got a C4CPC.

I'm also asking if this new board and the c4cpc will work ok together.

I hope that clears things up a little.  :D

Online Duke

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Re: Galaxy & Zen80 boards
« Reply #36 on: 21:59, 10 July 18 »
@Duke

Nice work  8)

Looking forward to getting one of these in the future if you release them.  :)

Will it work ok with the C4CPC cart plugged in, I mean will they both work ok together, also what about the power supply needed, I know people needed o get a new power supply if they use the C4CPC in a GX4000.

Thanks. Yes it will work with C4CPC - at last I have one so I can test it!
A proper powersupply for GX4000 will be needed yes, I use a 5V 2A.

Offline keith56

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Re: Galaxy & Zen80 boards
« Reply #37 on: 11:07, 11 July 18 »
Sounds like a great bit of kit, and will allow all the GX4000 owners to have the equivalent of a 6128+, which will be great for software developers like me who use DSK, and don't want to support 64k!

I know it's a stretch, but if it WERE possible to support a faster processor this would give a big performance boost to people with the V9990 external GPU, on my game, the 6mhz MSX saw a 33% speed increase, and the R800 had over 100% faster speed compared to the regular 4mhz MSX.

Really amazing stuff!
Chibi Akuma(s) Comedy-Horror 8-bit Bullet Hell shooter! // 「チビ悪魔」可笑しいゴシックSTG ! ?
Want to learn to make games in Assembly? Check out my Text+Videos Tutorials for Z80, 6502, 68000

Offline Gryzor

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Re: Galaxy & Zen80 boards
« Reply #38 on: 11:16, 23 August 18 »
No news? :)

Online Duke

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Re: Galaxy & Zen80 boards
« Reply #39 on: 00:19, 12 September 18 »
No news? :)
Gah sorry missed that :)
  No (well some but I can hardly remember where I was), too much real life stuff been going on, be back at it soon !

Offline GUNHED

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Re: Galaxy & Zen80 boards
« Reply #40 on: 17:07, 24 October 18 »
Well, since these new boards can emulate RAM and ROM ... Could it be doable to speed up the Z80 (and RAM and ROM access) to 8 Mhz or more? Of course the access of V-RAM (first 64 KB) would still need to run at 4 MHz in case they wont make more.

The GA, PSG, FDC, PIO all work with up to 6 MHz (in my case).


More power can't be a sin  ;)
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Online Duke

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Re: Galaxy & Zen80 boards
« Reply #41 on: 20:39, 25 October 18 »
Well, since these new boards can emulate RAM and ROM ... Could it be doable to speed up the Z80 (and RAM and ROM access) to 8 Mhz or more? Of course the access of V-RAM (first 64 KB) would still need to run at 4 MHz in case they wont make more.
I'll see what I can do when I resume the project. In theory you could use the ARM z80 emu (without syncing to the mb) in expanded mem at probably 50 times or more than the normal speed , but for the real z80 chip to see the new register values at return, memory reads from expanded mem would be needed (pops in usual speed).
There's some other option also to considerate.

Offline GUNHED

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Re: Galaxy & Zen80 boards
« Reply #42 on: 17:40, 26 December 18 »
Well, if you need a person to test the upcoming hardware, then let me know. I got a new unused GX4000 here just waiting to see the sun of sense coming up.  :) :) :)
http://futureos.de --> Get the revolutionary FutureOS (Recent update: 2018.08.23)
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Online Duke

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Re: Galaxy & Zen80 boards
« Reply #43 on: 22:35, 26 December 18 »
Well, if you need a person to test the upcoming hardware, then let me know. I got a new unused GX4000 here just waiting to see the sun of sense coming up.  :) :) :)

Thanks. Starting get some energy and motivation back to continue the work on this, but right now I had a "great" idea for the M4 board, which I am gonna finish first :)

Offline GUNHED

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Re: Galaxy & Zen80 boards
« Reply #44 on: 19:39, 27 December 18 »
Yes, it's always better to finish things. Else it's easy to get lost with everything  ;) :)
http://futureos.de --> Get the revolutionary FutureOS (Recent update: 2018.08.23)
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