after all, it's not the Epson interface ;-) On Sun, Feb 2, 2025 at 10:48 AM Nigel Johnson Ham via cctalk < cctalk@classiccmp.org> wrote:
> On 2025-02-01 08:43, Frank Leonhardt via cctalk wrote: > > > > On 31/01/2025 23:07, Chuck Guzis via cctalk wrote: > >> On 1/31/25 13:57, Tony Duell via cctalk wrote: > >>> On Fri, Jan 31, 2025 at 9:38 PM Fred Cisin via cctalk > >>> <cctalk@classiccmp.org> wrote: > >>> > >>>> The first parallel printers might have been Centronics. Hence the > >>>> interface and blue ribbon connector being called "Centronics parallel" > >>> The first printer that Radio Shack/Tandy sold for the TRS-80 (at least > >>> in the UK) -- the 'TRS-80 Line Printer' (it was nothng of the sort, of > >>> course) -- was a rebadged Cantronics with the obvious parallel > >>> interface. I have the Centronics version here and repair it using the > >>> Radio Shack service manual. > >> Out in the field during the late 60s and 70s, I found that the > >> Dataproducts interface was more common than the Centronics. > > > > I think the Epson MX80 was responsible for standardising the > > Centronics interface :-) > > > > Not only was it TTL only and therefore easier to implement in > > hardware, but it was much faster than RS-232. > > > > You could get other interfaces as add-on boards, including RS-232, > > Apple, TRS-80 and IEE488. I believe they got a 50% of market share for > > printers with this, from a standing start. > > > > > Why can you not acknowledge that it was standardised by Centronics years > before Epson came on the scene? > > > -- > Nigel Johnson, MSc., MIEEE, MCSE VE3ID/G4AJQ/VA3MCU > Amateur Radio, the origin of the open-source concept! > Skype: TILBURY2591 > >
