Maybe we should get some samples sent into the guys at visual6502.org who, despite the name, are attempting to image large swathes of old 8 bit ICs. See http://visual6502.org/donate_hw.html — they seem fine with broken hardware so does anybody have any faulty ASICs? Or spares? Possibly even just for sale rather than donation?
On 10 June 2012 08:02, Adrian Brown <adr...@apbcomputerservices.co.uk> wrote: > A nice pdf of the logic gate layout would be nice ... ;) > > -----Original Message----- > From: owner-sam-us...@nvg.ntnu.no [mailto:owner-sam-us...@nvg.ntnu.no] > On Behalf Of Tommo H > Sent: 10 June 2012 04:31 > To: sam-users@nvg.ntnu.no > Subject: Good resources for learning about the ASIC? > > I'm currently partway through The ZX Spectrum ULA: How To Design a > Microcomputer, which is the book partly researched by photographing and > reconstructing the exact IC layout of the Spectrum's ULA. So it goes > into a lot of detail about how ICs were produced in general, the nature > of ULAs, the Spectrum's design constraints, how they therefore ended up > laying things out and all that sort of stuff. As someone who has > previously looked no lower than product data sheets it's fascinating. > > Does anyone know of any similar sort of details about the Sam's ASIC? > Presumably it's a similar process - application-specific interconnects > added to a generic, previously manufactured base - but benefitting from > seven years of advances in density? Though the Sam's design process > seems to have been quite extended, so maybe they used some other > process? > > I guess nobody has the resources to have photographed one but what > documentation do we have? Google's not turning much up. > > >
