V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Help & information about the V2.5 booster.
troed
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Re: V2.5 BOOSTER CURRENT PROTOTYPE STATUS

Post by troed » Wed Jun 06, 2018 12:45 pm

exxos wrote:
Wed Jun 06, 2018 10:07 am
Meanwhile, the V2.2 booster has been out of stock for some time, so I really need to wrap up this booster as its successor. Fast-Ram will run over 6x faster along with ROM and the CPU.
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?

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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

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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exxos
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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

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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