Started by LambdaMikel, 21:15, 09 March 18
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Quote from: LambdaMikel on 08:59, 11 March 18That'll be great
Quote from: rpalmer on 01:46, 06 April 18For the standard 2 Mb the answer would be yes for what has been developed so far (obviously limited to 2 MB), but as for the higher capacity then it is no at the present as I have yet to get even the prototype finished (i have already got the new board on order from beta layout and if successful will source them from someone else at significant reduced cost). I have recently seen that JLC PCB (from a youtube video) has an offer for PCB production of 10 boards for $2 (US) and i don't know how long that will last of even if it just the first order only.However, as more people see that having much larger capacity to work with is a bonus then we may see programs like SYMBOS, FutureOS and maybe others use it as they see fit.I would also like to point out that to get more than 8Mb would see costs rise dramatically since chips with higher capacity are more costly.The current source for 2MB SRAM chips is about $35AUS per chip from E14 and to make 16MB would need 8 chips which cost about $280 just for the memory (ouch). The 8 MB module uses 1MB SRAM chips which are 5 EURO each (from reichelt) and so 8MB is just 40 EURO (about $60AUS).rpalmer
Quote from: rpalmer on 01:46, 06 April 18I have recently seen that JLC PCB (from a youtube video) has an offer for PCB production of 10 boards for $2 (US) and i don't know how long that will last of even if it just the first order only.
Quote from: rpalmer on 23:37, 05 April 18GUNHEDIt does stay compatible as it uses the address memory address twice to get more.The 4MB expansion by people like Yarek use I/O address bit A10 to A8 to get the 4 MB address space (8 x 512K), I use only A9 to A8 to get 2MB (4 x 512K). I then use configuration zero to get 5 more bits of the memory bus and voila 32 x 2 MB.So if people want to use just the one address for memory expansion, then the memory module can simply ignore the upper 5 bits of the memory bus and get just 2 megabytes.rpalmer
Quote from: ComSoft6128 on 00:17, 06 April 18Is there any software that could use this?Cheers,Peter
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