10
votes
How was the APL character set represented on IBM mainframes?
It's important to keep in mind, that there weren't that much symbols using overstrike in basic (IBM) APL. By using an 8 bit codeset they all could be integrated. The most common charset on the ...
- 199k
6
votes
Was ∆ used in APL as a substitute for space because ECMA-17/ISO 2047 specified △ as graphical representation for space?
Some observations, not an entire answer.
In APL\360, only upper case letters, underlined upper case letters, and digits were allowed in user-defined names.
(There were a couple of exceptions: ...
- 31.9k
5
votes
How was the APL character set represented on IBM mainframes?
IBM had several different APL mainframe implementations, and they where updated and modified over many years to support different types of hardware and I/O equipment over their life time. The source ...
- 51
5
votes
What monitor could render APL2 characters in 1985?
Some 3270 terminals supported an optional Programmed Symbols feature, allowing the use of arbitrary character bitmaps. This was available on the 3279 Color Display Station (models 2B and 3B), the 3278 ...
- 6,572
4
votes
What monitor could render APL2 characters in 1985?
I realize that it's been over a year, but thanks to all for responding. The terminal in question WAS a 3179G. I had figured it must have been because it had the graphics ability to render the APL2 ...
- 343
4
votes
How was the APL character set represented on IBM mainframes?
I was once writing an APL compiler (never finished, having figured I could single-handedly write a compiler in a 10 week undergraduate programming project), and the choice I made was to have an ...
- 31.9k
3
votes
Accepted
Overstriking for APL on 3270s?
It's important to keep in mind, that there weren't that much symbols using overstrike in basic (IBM) APL. By using an 8 bit codeset they all could be integrated. The most common charset was Page 293 ...
- 199k
1
vote
What monitor could render APL2 characters in 1985?
1985, it could have easily been any IBM PC equipped with a Hercules Monochrome Graphics card. More likely, however (as you said this was on IBM premises), the machines capable of displaying the full ...
- 30.7k
1
vote
How was the APL character set represented on IBM mainframes?
This is a late answer but I hope that it might to some small extent be useful.
I've not delved into the original IBM APL to any extent other than to adapt my 2741 emulator to handle it, but have gone ...
- 1,308
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