http://atari4ever.free.fr/#ram
16MB RAM board for every ST.
Never seen one or heard of it being done.. Though probably a H4 project to use a 16mb simm. It also decodes TOS 206 but might be avoidable doing that part.
From what I can tell it generates MAD10 and fools the GLUE on address ranges. I assume to fool the MMU into thinking its accessing valid ST-ram when its actually accessing higher ranges.
If anyone wants a project..
If anyone wants a project..
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: If anyone wants a project..
I havent heard of anyone doing this either. Here is the main schematic.
Re: If anyone wants a project..
Never seen any info of images of it either. Would think the bulk of the logic could go in a GAL.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
- frank.lukas
- Posts: 660
- Joined: Fri Jan 19, 2018 11:52 am
Re: If anyone wants a project..
There was a 16MB (15MB) real ST Ram extension. It works by doing bank switching. Eight 2MB banks are possible ...
-> https://forum.atari-home.de/index.php?topic=13517.0
-> https://forum.atari-home.de/index.php?topic=13517.0
- rubber_jonnie
- Site Admin
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Re: If anyone wants a project..
Like I need another project....
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
-
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Re: If anyone wants a project..
Happy to route anything anyone sets up in eagle. Right now I’m going nuts
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Re: If anyone wants a project..
You might regret that offer @terriblefire
Re: If anyone wants a project..
H4 Mega ST version @terriblefire ?
I guess the pcb is the easy but in this case, it's the software to make it all work afterwards.
I guess the pcb is the easy but in this case, it's the software to make it all work afterwards.
If it ain't broke, test it to Destruction.
Re: If anyone wants a project..
~Interesting that someone else did similar solution then. So TOS may need patching to see the full RAM, but no great surprise. I also wonder how the TAB board also got around this issue as it just seems to mention using TOS206.. I guess lack of information there is the issue.frank.lukas wrote: ↑Wed Apr 08, 2020 6:27 pm There was a 16MB (15MB) real ST Ram extension. It works by doing bank switching. Eight 2MB banks are possible ...
-> https://forum.atari-home.de/index.php?topic=13517.0
Though I half recall suska gave 14MB ST RAM, but not sure, think that was TOS206.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
Re: If anyone wants a project..
There is the DRAM board I mentioned a couple weeks ago if you wanted a board to route.. This one would be 68k footprint pretty much PLD and DRAM. As it would be 68k, no use in any DRAM over 16mb as we can only really use 4mb - 14mb range for alt-ram anyway. I did get the xlinix chips, don't think I decided on a RAM yet though. RAM would need to be quick to use up to 60mhz CPU. Such a board would plug right into a H4. The 5v sram ones I designed end up costing towards £100 mark.. Its why I wanted some help with your dram controller stuff to design a cheaper board.terriblefire wrote: ↑Wed Apr 08, 2020 8:14 pm Happy to route anything anyone sets up in eagle. Right now I’m going nuts
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.