The TFMSX Is out of the bag...
Moderators: terriblefire, Terriblefire Moderator
Re: The TFMSX Is out of the bag...
I know you can use 41256 chips as replacements for 4164s, so it might be worth a look at those. And I have some I can send you a few to try?
If it ain't broke, test it to Destruction.
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Re: The TFMSX Is out of the bag...
It is an option id thought about. I might use the same stuff off the TF328 and see how it looks.stephen_usher wrote: ↑Thu Mar 18, 2021 12:37 pm
Just a thought. There are quite a few SMD 16bit DRAM chips available at lowish prices. Use one of those and just not use the upper 8 bits? I guess that they're bigger than a single 41464. Also 3.3V, which means more circuitry.
e.g. https://uk.farnell.com/integrated-silic ... dp/2901170
Unfortunately those are 1 bits. I'm looking for wiiiiiiiiiider. 41464 is still looking the best option.
This is just for the Video RAM. Main system ram will be 10ns STATIC RAM.
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"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."
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Re: The TFMSX Is out of the bag...
He wants a single 8 bit wide chip, rather than 8 1 bit ones. This is the problem.
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ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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Re: The TFMSX Is out of the bag...
Just dual-port some of the SRAM and then you can be hacky and write directly into the video memory rather than having to push the data through the VDP.terriblefire wrote: ↑Thu Mar 18, 2021 1:35 pmUnfortunately those are 1 bits. I'm looking for wiiiiiiiiiider. 41464 is still looking the best option.
This is just for the Video RAM. Main system ram will be 10ns STATIC RAM.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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- Moderator Team
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- Joined: Mon Aug 28, 2017 10:56 pm
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Re: The TFMSX Is out of the bag...
ach for first version i'll leave the 41464s in ...
———
"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: The TFMSX Is out of the bag...
I'll have a look what I have as I have far too much NOS old ram.
If it ain't broke, test it to Destruction.
Re: The TFMSX Is out of the bag...
So far I've found 12 x Mitsubishi M5M4464P which are 65536 x 4 bit, the same as the 41464, not sure if they aren't a little slow at 120ns.
Yeah I have too much ram, if its 4bit then it might be possible to use P21014? 256k x 4 bit. Got a few different variations and brands of similar chips and found my stash of 41464 chips.
Yeah I have too much ram, if its 4bit then it might be possible to use P21014? 256k x 4 bit. Got a few different variations and brands of similar chips and found my stash of 41464 chips.
If it ain't broke, test it to Destruction.