> On 2019-04-09, at 14:37, Mia Magnusson <mia_at_plea.se> wrote: > >> A number of those existed and can still be bought second-hand. >> Interfaces ranged from simply allowing connection either over >> parallel (via USER PORT) and converting character sets to a fairly >> sophisticated IEC serial to parallel conversion with full C-64 >> characters emulation. > > My impression, from reading some 64'er magazines, is that the user port > to Centronics were a common thing in (West) Germany. I am not sure about the Rest Of The World™ but in Germany yes, it was quite common. Also DolphinDOS has software support for printing over USER PORT. > Btw I actually own one of those IEC-to-Centronics interfaces. I haven't > tried it. The label on the case refers to one common printer brand, the > PCB to another and a label on the programmable IC (can't remember if > it's a microcontroller or a separate eprom) refers to a third printer > brand, so this interface were probably commonly in use with a bunch of > Centronics compatible printers. There were some that you could get as a printer accessory and there were "standalone" interfaces that could have whatever label the vendor of the day put on it. > > If someone really wants I might be able to scan the PCB layout and read > out the eprom (if it's an eprom and not some microcontroller that I > lack equipment to read). However my eprom programmer is stored > somewhere underneath-behind [tm] so it will take a while. I have a few of those somewhere and I /think/ that in the most common type there is something 8051-ish inside. Maybe a smaller package with less port bits. -- SD!Received on 2020-05-29 21:39:50
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