> On Dec 14, 2020, at 9:26 AM, emanuel stiebler via cctalk
> <[email protected]> wrote:
>
> On 2020-12-14 05:41, Brent Hilpert via cctalk wrote:
>> On 2020-Dec-14, at 1:26 AM, ben via cctalk wrote:
>>> Often for data input one could use over strike characters for input. Not EQ
>>> might be = BS | Did any video display terminals
>>> repeat the same effect?
>>
>> Yes. Coincidentally I've just been refurbishing one - a Teleray 3931.
>> It's an ASCII/APL terminal, overstriking was included for the APL mode.
>>
>> http://madrona.ca/e/teleray3931/index.html
>>
>> Note the screenshots in APL mode.
>
> Is it really an overstrike? They look simply like different characters.
> At least, I didn't (probably missed it) how they can be generated out of
> the available ones...
I wondered too. General overstrike requires a bitmap display, or some sort of
persistent display. Paper is an example; a Tek 4010 would also handle
overstrike since it uses a storage tube. And PLATO terminals did overstrike
just fine since they are bitmap displays with per-pixel memory.
paul
