16BIT ROM CART THOUGHTS

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exxos
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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Fri Jul 06, 2018 11:39 am

Totally forget about this project, will see if I can work out where I got up to with it all...

Looks like design was basically finished, edge connectors seems right direction now.. fixed some issues with the DRC..

So now 3 prototypes on order..

c4.jpg
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4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

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Atarian Computing
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Re: 16BIT ROM CART THOUGHTS

Post by Atarian Computing » Fri Jul 06, 2018 6:45 pm

How have I completely missed this thread? I made this in the beginning of May:
MultiCart.png
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MultiCartback.png
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Sketch (32).png
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Based on Arne's Test Cart. It's functionally fully ready but cosmetically not yet and on hold. Haven't produced any. I use KiCad 5.

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Re: 16BIT ROM CART THOUGHTS

Post by Atarian Computing » Fri Jul 06, 2018 6:57 pm

Here are my schematics:
Sketch (33).png
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MultiCart.pdf
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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Fri Jul 06, 2018 7:06 pm

Atarian Computing wrote:
Fri Jul 06, 2018 6:45 pm
How have I completely missed this thread? I made this in the beginning of May:
:shrug: Thread has been on & off for about a year anyway. Its never been very high up on my to do list.
Atarian Computing wrote:
Fri Jul 06, 2018 6:45 pm
Based on Arne's Test Cart. It's functionally fully ready but cosmetically not yet and on hold. Haven't produced any. I use KiCad 5.
Basically the same really then. Though I went with diodes for OE rather than a IC. Was some talks about it all *somewhere* in this thread. I went with PLCC as was using them in other things, so made sense to save buying yet another part. Plus a bit smaller as well :)

EDIT:
Actually I am using UDS, LDS, but you are just using the ROM lines there. I wonder if there is any need to even use UDS, LDS at all, as ROM4 will be valid on the ROM range anyway..Will have to try it when I get my boards. Though assume its working if someones been producing them like that anyway.
1.jpg
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4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: 16BIT ROM CART THOUGHTS

Post by Atarian Computing » Fri Jul 06, 2018 8:31 pm

exxos wrote:
Fri Jul 06, 2018 7:06 pm
Actually I am using UDS, LDS, but you are just using the ROM lines there. I wonder if there is any need to even use UDS, LDS at all, as ROM4 will be valid on the ROM range anyway..Will have to try it when I get my boards. Though assume its working if someones been producing them like that anyway.
Yup, UDS or LDS are not needed.

I was never going to mass produce or sell these anyway. I have "perfected" a method to create cartridge images and have successfully made "flash drives" out of my previous batches of 128KB carts. I have carts that contain a PRG file that, when executed from the desktop, installs a reset proof ram disk as drive C and extracts contents into the new C-drive and reboots as it would from a hard drive.

Comes in very handy when working on resto projects without floppy or hard drives. I'm extremely pleased with how it's worked out. Challenge is getting stuff to fit 128KB. UPX is your friend. Another dear friend is PFXAFX which let's you compress not only executables but everything.

If you don't want a ramdisk but have an app that has rsc files and others, I've got a neat workaround that as well.

Then finally I wrote a PowerShell script to create a 128KB image from the file you choose.

Been meaning to do a write-up on it. Cool stuff.

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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Fri Jul 06, 2018 9:53 pm

Atarian Computing wrote:
Fri Jul 06, 2018 8:31 pm
I have carts that contain a PRG file that, when executed from the desktop, installs a reset proof ram disk as drive C and extracts contents into the new C-drive and reboots as it would from a hard drive.
Sounds cool!

yeah 128K is somewhat limiting. Getting a bit off topic, though was a debate last year about keeping or removing the cartridge port form my new motherboard.. was 50:50 really. . If had a new port, could add RW, and even remap it for larger space.. but then we lose the ability to use old carts.. though possible adapters could be made..
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Tue Jul 24, 2018 2:20 pm

New boards finally arrived today :)

Just quickly built one up and tested it and it is working :)

So next I need to create a ROM image to hold multiple diagnostic cart versions..

diag.jpg
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4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Tue Jul 24, 2018 4:50 pm

So for some reason the TT and Falcon diagnostic ROM's are not working..

I found this..

ROM4 allows the cart to be addressed $FA0000 - $FAFFFF
ROM3 allows the cart to be addressed $FB0000 - $FBFFFF.

So as the Falcon one is 128K that probably is why.. though the TT is 64 K but still doesn't work.. unless it actually needs a TT to do anything..

I can only assume this because I am not using ROM3 line ? Does anyone have a Falcon diagnostic cartridge where they can see actually how it was wired up ? Or anyone know of schematic for it ?
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: 16BIT ROM CART THOUGHTS

Post by exxos » Tue Jul 24, 2018 7:22 pm

I added in the LS86 logic to take care of the Falcon ROM.. Still not really sure why the TT ones isn't working.. But will have to get these new PCBs made and see if it works or not... Probably could do with finding someone with a actual TT to try it out on..


rev5.jpg
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4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Re: 16BIT ROM CART THOUGHTS

Post by crashman » Wed Jul 25, 2018 9:22 am

The TT rom only works on TT, as the Falcon, only work on Falcons.
Tested.

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