On Fri, Mar 16, 2018, 20:58 allison via cctalk <cctalk@classiccmp.org> wrote:
> On 03/16/2018 08:28 PM, Charles Dickman via cctalk wrote: > > So the PDP8/e used the KC8-EA programmers console which has > > incandescent indicator lamps and the PDP8/f used the KC8-FL > > programmers console which has LED indicator lamps. > Wrong. The 8f uses the same as the 8e. It was the 8m that had the > LED console. If memory serves it was date of design that influenced it. > I have seen several 8/f systems that have LEDs, for what it's worth. I can only imagine DEC was transitioning the 8/m and 8/f to take LEDs instead of incandescents. > > I can be certain as I have an 8f built in 1973. I've since moded it to > take bright yellow LEDs as lamps are not easy to find and annoying > to replace. If I care to I can put the lamps back. Since I put > operational > over absolute faithful its better as is, less digging in the box. > The bulbs are still available on Mouser. I've ordered a bunch for my 8/e and have been very happy with them. http://so-much-stuff.com/pdp8/repair/bulbs.php > > However its possible to swap the panels, I tried it once and it pass diags > and worked fine. Didn't like the red. > I've found that my LED 8/m is very hard to read, as the LEDs are very dim. > > > > > Another console question... > > > > Has anyone ever seen a PDP8/i style console for the PDP8/e? Looking at > > the way the PDP8/e console functions, it should be possible to time > > multiplex all the register to the data bus so they are all visible at > > once when the machine is halted. > No and can't! The 8i (nor the 8L) was not omnibus. > I think he's aware (hence "style"). Kyle >
