Topic: Sord M5 multicart  (Read 44356 times)

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Offline TBC

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Re: Sord M5 multicart
« Reply #75 on: March 20, 2014, 12:23:49 PM »
I have now dumped Mappy too, get the rom from the link above.

Offline Panther

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Re: Sord M5 multicart
« Reply #76 on: March 21, 2014, 12:19:19 AM »
I WANT/NEED a multicart !!!!!

Offline sirmorris

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Re: Sord M5 multicart
« Reply #77 on: June 02, 2014, 03:44:45 PM »
Well well, look what the cat dragged in :D

I refuse to make promises any more these days as I've proved to myself quite comprehensively that I'm unreliable. I don't want to let people down.

It's no secret that I've had a few problems with the M5 multicart, and I've been unable to work out why. The appearance of new roms has prompted me to start thinking about it again though...

Speaking of which - THANK YOU TBC! You are a true friend to the retro scene :D

So in conclusion - no promises but watch this space ;)

Stuart - your name is at the top of the list if I get some working boards.
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Offline AndyRCM

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Re: Sord M5 multicart
« Reply #78 on: June 02, 2014, 06:28:48 PM »
oh yes please! ;)
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Offline Panther

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Re: Sord M5 multicart
« Reply #79 on: June 02, 2014, 07:22:14 PM »
Cheers Sirmorris !!  ;D

Offline sirmorris

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Re: Sord M5 multicart
« Reply #80 on: June 02, 2014, 07:50:24 PM »
Have you not got one Andy?? I thought you did :?
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Offline AndyRCM

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Re: Sord M5 multicart
« Reply #81 on: June 02, 2014, 08:45:01 PM »
Yeah we do . . . but to be able to 'add' more games or indeed to have a few more games available would be great.
JUST me being greedy! ;)

A
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Offline sirmorris

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Re: Sord M5 multicart
« Reply #82 on: June 02, 2014, 09:49:37 PM »
You can just flash a new image.

Looking at the design now however I think I really made things hard for myself.

If I was to do it again I'd forget the RAM, and stick to 8K ROM images max. As it is there's a circuit on there which tries to be clever and handle the 24K BASIC-F image. It's a pain and also forces a minimum 16K image size :(

There are other problems too. I think I need to get back to basics - which (ironically ;¬) means omitting BASIC-G and BASIC-F. It might be an issue for hardcore users, but I suspect that hardcore users aren't the target demographic for this cart...

What do you think?

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Offline AndyRCM

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Re: Sord M5 multicart
« Reply #83 on: June 02, 2014, 09:52:43 PM »
I would tend to agree.
I mean for us (RCM) - it is ALL about the games . . . so the more games the better. :)

A
"I could see the faces of those who led pissing themselves laughing" - Funeral Pyre by The Jam

Offline TBC

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Re: Sord M5 multicart
« Reply #84 on: June 03, 2014, 09:18:45 AM »
I think it's great that you had RAM in there, didn't actually know that when I bought it.
Saves me from having to use my almost new boxed EM-5 32 kB expansion cart (only been removed from the box to be photographed once).
And btw, the Mahjong-game cart has RAM too.

I don't know how your cart is made, there's no processor on the board? You shouldn't be forced to have a minimum image size.

I'm actually planning a multicart of my own, but with a few more features.
Since I'm making games for the Sord M5, the first priority is to have a USB-connection to my PC so I can cross-assemble and run easily.
Also, a feature I really want is to have a mouse.

Offline sirmorris

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Re: Sord M5 multicart
« Reply #85 on: June 03, 2014, 10:01:23 AM »
There is a small PIC on board. In hindsight I should have used a chip with more pins and had a smaller page size. I don't like the button arrangement either. I was over-excited :D

I've been thinking about a new version too. I'll be happy to discuss ideas with you and share any info I have. I'm not in this for the ego/money - I just want people to be able to use the software :)

My new thoughts were centred around a couple of ideas:-

1. very simple. 8k banks, switch select, no RAM. for those who like to game.

2. as above with a CPLD and ability to add RAM. Having the cpld on there would mean more flexible page sizes, memory mappings etc.

3. the full-on: PIC321MX with USB support for writing the flash/CPLD and RAM. It would be great to be able to select the program from a menu. If only there was someone who knew about coding for this machine.. hmm ;)

« Last Edit: June 03, 2014, 10:07:22 AM by sirmorris »
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Offline sirmorris

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Re: Sord M5 multicart
« Reply #86 on: June 03, 2014, 10:15:07 AM »
Another thing I'm considering is an 'ultra cheap' version of the current board which is a total hack. Cost will be parts + labour (not easy to build due to above-mentioned eagerness) and what you'll get is a basic board with some dip switches hacked on, instead of the microcontroller. No RAM. How does that sound to people?
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Offline sirmorris

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Re: Sord M5 multicart
« Reply #87 on: June 03, 2014, 10:42:02 AM »
Top game...
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Offline TBC

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Re: Sord M5 multicart
« Reply #88 on: June 03, 2014, 11:36:38 AM »
Yeah, galax is a great game on the Sord M5.
I'd be happy to help program anything you need.
I'm not familiar with PIC321MX, is that the real name?
I've programmed a PIC18F4550 and got it to connect with my PC via USB, I was planning to use that one.

Offline sirmorris

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Re: Sord M5 multicart
« Reply #89 on: June 03, 2014, 02:23:50 PM »
PIC32MX is the series. I'm using the MX150f128d on my einSDein board. I love it. They are MIPS/RISC based devices with speeds from 40-80mhz. Many have USB support built in. They are *amazing* chips, loads of memory and great dev tools. I used the 18F series before, but I don't think I'll be going back now that the 32s have made it on to the scene ;D  I really appreciate the extra memory you get compared to the 18s. All that said, the 18F are good solid chips too, I won't knock them. I've never killed a PIC yet, 18 or 32, and believe me I've tried  :o

Some '32s are available in DIP format, so great for breadboard experimentation. Not many pins on those, though. To get around the pin count limit you can use port remapping. It's not perfect, but you can usually find a pin configuration that allows you to use all the peripherals you need, such as serial, I2C, SPI, USB, parallel port and plenty of 5V tolerant I/O. Oh and DMA for memory accesses, though you'll need a chip with a larger pin count, so we're talking SMD. They are 3.3v devices but I haven't found that to be a problem. It certainly makes SD card handling easier..! They have good library support, with lots of examples for all the peripherals.

/sales pitch over/ ;)
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