Yep, the original seller (the american one) said that a certain point this board was upgraded to support 1MB of RAM, which basically converted this thing into a Macintosh Plus minus the missing SCSI port. Since then, the chips have been reverted to the stock ones, with the exception of not being Apple branded; however I guess they "forgot" to remove at least part of the modification...
I'm wondering if it would be just fine to remove all those cables? I honestly have no idea of what crazy magic they're doing to enable the machine recognize more RAM, but I recall that at least a few "ram upgrade" mods I've seen around resorted to an additional chip taking over some of the duties of the address decoder or mux to enable addressing larger amounts of memory.
EDIT: I actually noticed there is an extra chip stacked on top of the original one, in some sort of strange configuration, which practically answers my previous question about how this thing actually performs the addressing...
Actually, a couple of extra strange things: it looks like the yellow capacitor which should have been placed in RP3 has actually been replaced by a number of resistors; also, apparently there was something sledged to one of the central pins of the CPU, probably as part of this piggyback mod. However there are a number of things missing, and some cables have already been cut by the previous owner, so I'm not sure about the feasibility of restoring the full functionality of the memory hack.
I'm wondering if it would be just fine to remove all those cables? I honestly have no idea of what crazy magic they're doing to enable the machine recognize more RAM, but I recall that at least a few "ram upgrade" mods I've seen around resorted to an additional chip taking over some of the duties of the address decoder or mux to enable addressing larger amounts of memory.
EDIT: I actually noticed there is an extra chip stacked on top of the original one, in some sort of strange configuration, which practically answers my previous question about how this thing actually performs the addressing...
Actually, a couple of extra strange things: it looks like the yellow capacitor which should have been placed in RP3 has actually been replaced by a number of resistors; also, apparently there was something sledged to one of the central pins of the CPU, probably as part of this piggyback mod. However there are a number of things missing, and some cables have already been cut by the previous owner, so I'm not sure about the feasibility of restoring the full functionality of the memory hack.