Another 3270 terminal emulator

Just to be complete I thought I’d mention another freely available 3270 terminal emulator on Linux. I briefly tried the c3270, 3270 terminal emulator, it is easy to increase/decrease the font size simply by pressing <Ctrl>+ or – respectively. The thing that wasn’t readily clear to me was how to use special keys such as …

UNPK and ED

After reviewing the above two S/370 Assembler instructions. I guess I’m wondering why you would use UNPK which unpacks packed numbers into zoned decimal digits which aren’t necessarily printable. ED on the other hand can also can also unpack packed numbers into zoned decimal…but these are printable. I guess I knew at one time but …

MVS 370 Assembler & Docker

More work on understanding MVS 370 Assembler. Realize I’ve forgot much. Such as there’s no Divide Halfword and with divide [D] the dividend requires even(Reminder)/odd(Quotient) pair of registers. If not for the SNAP macro, I would have probably spent way too much time trying to find out why “PACK PACK01,=P’67890′” doesn’t work, “PACK PACK01,=C’67890′” is …