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Messages - sirmorris

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FOR SALE / WANTED / Re: M5 Multi II - New version of Sord M5 multicart
« on: December 14, 2019, 09:23:38 AM »
Yeah that'll work too  8)

What are you working on?

FOR SALE / WANTED / Re: M5 Multi II - New version of Sord M5 multicart
« on: December 12, 2019, 07:42:22 PM »
The RAM on the cart is mapped to the upper 32k and is always present. It is contiguous with the built-in 4k, which appears at 0x7000-0x7fff.

The M5 has a printer port but it's output only. Probably the best way to get code into the machine would be to rig something up to one or both of the joystick ports. They're easy to read and if you were clever you could read multiple bits at once to increase the speed. Arduino or similar on one side, some nifty machine code on the other. In fact you could read a byte at a time, with 4 bits on UDL & R on both ports and a clock on one of the fire buttons...

All you'd need is a 6 pin mini-din lead and an arduino, some basic soldering chops.

FOR SALE / WANTED / Re: M5 Multi II - New version of Sord M5 multicart
« on: February 03, 2017, 04:24:43 PM »
How are you getting on with your cart Andy?

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« on: October 14, 2016, 09:35:46 AM »
Version 2 now available! See new thread 'M5 Multi II - Sord M5 multicart'

FOR SALE / WANTED / M5 Multi II - New version of Sord M5 multicart
« on: October 13, 2016, 10:32:59 PM »
How many years has it been? Too many. Anyhow, I've finally done what I should have done years ago and re-designed the cart.

The original was hard to build and overly complex. The new version has simplified the construction and the user experience. Game selection is by menu, no DIP switches or button presses  8)  Just switch on, press a key and you're away.

Carts come with all the currently available (working) ROM images as well as BASICs -I and -G, which benefit from an additional 32K of RAM.

Carts are lovingly hand built to order. Price is £40. UK postage £3 1st class signed for. I'll ship anywhere, but I insist on tracked/signed for service when sending overseas.

Facebook usually gets the first pictures over at the Sord Computers group.

PM me for further details!


GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« on: February 26, 2015, 09:22:48 PM »

I had a cable which was connected through, I think it was from a Sun workstation or similar.

I have a cable spare if you'd like it. PM me.

(Oh, I think we may have crossed paths on FB Sord group :) )


OFF TOPIC / Spectrum event in Oxford, 6th December.
« on: November 11, 2014, 02:57:51 PM »
Where as well as speccys doing what they do best there will be an attempt at some kind of record to do with linked speccys playing Mahler..


Are spectators allowed? :D I'll be in Coventry so I could slip by, possibly - hangover depending ;)

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« on: June 04, 2014, 09:24:33 AM »
It forms the heart of the 'pinguino' series of dev boards. Their designs and bootloader/firmware are all open source - perhaps one of those would be a good foundation?

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« 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/ ;)

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« on: June 03, 2014, 10:42:02 AM »
Top game...

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« 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?

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« 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 ;)

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« 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?

GENERAL RETRO CHIT CHAT / Re: Sord M5 multicart
« on: June 02, 2014, 07:50:24 PM »
Have you not got one Andy?? I thought you did :?

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