The System360 Model 20 Wasn't As Bad As All That 3886
My first student job was to port a 1401 MPIO program to 360-30. MPIO did the unit record (cards) to tape and tape to unit record (print-punch) front end for the univ. 709. For a while they had both the 1401 and the 360-30 side-by-side ... and then they removed the real 1401 and would switch the 360-30 back-and-forth between 360 mode and 1401 hardware emulation mode.
controller reference:
from above:
2803 Tape Control Unit for S-360.
I think the character set would have been called pica type (12 pt). I never dealt with the ALA until...
Used to attach 2401 drives.
2821 Unit Record Preipheral Control Unit for S-360. Used to attach 1403 and 2540 to multiplexer channel. Typically, the 1052 console typewriter would be at I-O address 009, the printer would be at 00F and a second printer at 00E.
On 7 Jul 2006 08:45:38 -0700 in alt.folklore.computers, also Universal Character Set Buffer on IBM printers with loadable character sets; from CP LOADBUF command docs: "IBM supplies the...
2822 Tape reader control unit used to attach 2671 to S-360.
2841 DASD Control Unit for S-360.
Used to attach 2303 drum, 2311 disk and 2321 Data Cell.
2848 Display cluster controller for 2260 display heads.
Used an acoustic delay line to hold the screen buffer. The character generator used a magnetic core ROM to hold the character dot matrix lookup table.
... snip ...
1401 reference:
In the above, it talks about 1403 operating at 600 lines-minute. I think this is the 1403-7 ... it still had manual cover lift and the paper box feed was exposed.
The 360-30 had a 1403-N1 that operated at 1100 lines-minute, and had a hydraulic lift cover ... that completely enclosed the paper box feed. The top of the 1403-N1 was convenient height for placing things (coffee cups, card trays, etc), however, the 1403-N1 had this habit of automatically raising the cover when it ran out of paper. This top was hinged on the back so as the cover raised, the top went from horizontal to nearly veritical position.
The univ. 360-30 had 1052-7 operators console at address '009', the 2540 card reader at address '00C', the 2540 punch at address '00D', and the 1403 at address '00E'.
For the MPIO port, I got to design and implement my own stand-alone monitor, interrupt handlers, device drivers, storage management, task management, etc.
previous 1403 post
random past posts mentioning MPIO port:
The System360 Model 20 Wasn't As Bad As All That 3887
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