If I recall correctly, George would need only three ROMs, since they were supposed to be able to act as one, two or four ROMs at once, thus they are able to provide a complete soundbase for a CS.
I have two P2ks, two CSes and one wife, so I think I would go for 2-4 ROMs and I would LOVE to see a community repository of ROM images, khem khem.2015-03-14 11:06 GMT+01:00 George G pluto_ro@... [xl7] <xl7@yahoogroups.com>:
Yes man, I have 3 command stations I will buy 12 !!!So do it pleaseThanks
Sent from my iPhoneThe pin connections from the P2K SIMM use the standard data pins of a DRAM SIMM for data (with the upper 16-bits shorted to the lower 16-bits since the SIMMs are 16-bits wide rather than 32-bits wide). Power signals are the same as a DRAM SIMMThe address pins for the P2K SIMMs are taken from all the other signals on the DRAM SIMM. What Apple has done in a Macintosh is anyones guess (I spose I could check out the hardware reference manual) but there is no way that one of these would be compatible with a P2K since the P2K needs to have a second FLASH bank for the preset memory.And you couldn't really have an 'adapter' to "modern storage" because the interface is random parallel access at about 130ns which is way too short to convert the address signals to an access cycle for something else. You could have RAM on a device and dump an image from some other storage to that but having enough RAM is prohibitive even using PSRAM....I hadn't realised that there was still interest in a P2K FLASH SIMM. I have a design (that needs the PCB layout completed - about half way through) that would allow SIMM images to be downloaded via USB, play live sound via USB and simultaneously operate as up to 4 SIMMs (128MB) at once. Shouldn't take too long to finish off if there's a market. I would guess a cost of $200-$250 for them depending on how many I make at a time.Also have to "read" the contents of existing ROMs to be able to use them but I have a finished design for that which just needs to be made.
From: "Bruno brunorc@... [p2k]" <p2k@yahoogroups.com>
To: xl7 <xl7@yahoogroups.com>; p2k <;p2k@yahoogroups.com>
Sent: Sunday, 8 March 2015, 18:42
Subject: [p2k] Programmable ROMs?
No USB, but still... anyone more tech-savvy can say something about it (apart from the fact that we would need 32MB ROMs):
http://www.downtowndougbrown.com/programmable-mac-rom-simms/
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