V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Help & information about the V2.X series boosters.
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exxos
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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by exxos » Wed Jun 06, 2018 10:37 pm

troed wrote:
Wed Jun 06, 2018 12:45 pm
Maybe I'm misunderstanding, but adding alt-ram will require TOS 2.06 and it won't be of use for anything that doesn't support alt-ram. Or do you only intend it for shadowing TOS?
TOS206 is needed for alt-ram, not a problem for the booster. I have no idea what use alt-ram is, but people keep nagging about it, people buy monster for alt-ram and IDE, so its half step there for now.

Problem is 10ns fast-ram is likely going to be expensive, doable for 1MB, but cost and size soon ramps up with more MB. So I may look to using 10ns sram for ROM shadow, and maybe go with 55ns for 8MB fast-ram, but limits to around 32Mhz effective speeds then.

Once I get this booster done, it can go on sale, get a few sales to fund looking into the FPGA blitter and IDE next likely.
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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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by exxos » Fri Jun 22, 2018 8:59 pm

I have been looking at options for flash and ROM...

Basically 55ns 8Mb 3.3V is the only real option for the "fast ram" bank. 3.3V flash 8Mb 55ns. 2Mb 3.3V 10ns for the ROM shadow. It's the smallest and cheapest set of SRAM options. Problem is a huge bank of IO converters.. plus I have space limitations so keeping the SRAM & Flash to 1 IC is the only real option because of space limitations. I am hoping to put all the IO converts in a huge row, then branch off to the "3.3V section" above the IO row.

Routing this thing will be a nightmare and likely be a while before anymore updates for a while I do the PCB layout.
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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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by Atarian Computing » Sat Jul 21, 2018 4:36 pm

exxos wrote:
Wed Jun 06, 2018 10:37 pm
TOS206 is needed for alt-ram, not a problem for the booster. I have no idea what use alt-ram is, but people keep nagging about it, people buy monster for alt-ram and IDE, so its half step there for now.
I would give anything to be able to run Sparemint on my STacy. That needs a lot of alt-ram.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by exxos » Sat Jul 21, 2018 6:38 pm

Atarian Computing wrote:
Sat Jul 21, 2018 4:36 pm
I would give anything to be able to run Sparemint on my STacy. That needs a lot of alt-ram.
It will have alt-ram at least next design, likely flash and fast-rom.. though flash software will be something someone else may have to code else I will be spending months on it myself otherwise.
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: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by robdaemon » Sat Jul 28, 2018 1:17 am

This would be a great upgrade for my Mega ST2. I have a Marpet 8 MB board for it, but it's not usable without TOS 2.06.

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Mon Nov 12, 2018 10:03 pm

No updates to report yet :(

But now I have had but experiences with the level translators, and is going to continue this design with 5V stuff. You will take a fair while just to get the regular ROM connected up and working. But if doing the new board, I would want to put fast ram on there as well..

Though back to the point that the SRAM is about £10 per MB. This will give up to 50MHz fast-ram speeds. There are of course the maximum would generally be 8MB (£80) though I have suggested 10MB or 12MB before, but I think there was some problem with possible conflict with external graphics RAM or something..

So I will probably add on space for 8 chips for now.. Then they can be populated in 1MB steps. Likely I would only fit 1MB for testing purposes anyway. Cheaper to kill 1 chip than 8 :)

Really I just want to discontinue the V2.2 booster, and get this current design and running as it is the V2.2's successor. Of course I want to not just ramp up the speed, but add the new to it like the long-awaited fast ram. I have of course considered adding flash ROM, and and even IDE, but each new feature could take several months to test and debug individually. The trying to bring up everything on one card at once, is not really realistic to do.

Of course this project has been on hold for some months again, but I hope in the New Year I can spend bit more time on this again. Of course wiring up ROM & RAM really only comes down to PCB routing time. There is the firmware as well, but that should really be pretty simple to do as well.

Incidentally I do actually have 2 of the SEC prototypes somewhere which if anyone wants to purchase one, I will try and find them flash the firmware into them.. It is just the 50MHz CPU running... Benchmarks here... viewtopic.php?f=6&t=45&start=160#p6266 Not terribly exciting to say the least...
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: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by PaulJ » Mon Nov 12, 2018 10:18 pm

Exxos does it have the decode TOS 2.06 does it run reliably..?

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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Mon Nov 12, 2018 10:21 pm

PaulJ wrote:
Mon Nov 12, 2018 10:18 pm
Exxos does it have the decode TOS 2.06 does it run reliably..?
You mean the current SEC booster ? There is no ROM yet.. that comes next...

The current boards look like this...

viewtopic.php?f=6&t=45&start=110#p5938
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: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by exxos » Tue Nov 13, 2018 11:29 pm

Small progress...

Schematic updated, removed the flash (was 3.3v stuff!) and added the fast-ram. Seems I probably only need 4 chips for 8 MB...

Added in the normal PLCC44 ROM...

This is all I am doing with this booster.. but that is enough to keep me busy for some time yet...

sec2f.png
sec2f.png (536.55 KiB) Viewed 160 times

sec2.png
sec2.png (242.2 KiB) Viewed 160 times
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: V2.5 BOOSTER CURRENT PROTOTYPE STATUS (SEC BOOSTER)

Post by rpineau » Tue Nov 13, 2018 11:42 pm

I don't see the SRAM[1..4] signals on the CPLD
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2

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