Ersatz-11 emulated terminal ports

Ersatz-11 uses a device-independent interface to attach any supported terminal device type as the physical side of any supported PDP-11 terminal device type. Each line is created using a one-line ASSIGN command in the E11.INI initialization text file. SET commands may be used to modify the port type, CSR/vector addresses, and interrupt priority, but in many cases this is not necessary thanks to E11's sophisticated rules for choosing default values for these parameters, which include automatic computation of "floating" CSR and vector addresses. Terminal port emulation is done on a line-by-line basis, so it is possible to mix and match any combination of physical terminal lines within the same emulated multiplexor.

The DOS/Windows versions of E11 include emulation of the VT11 vector graphics processor, monitor, and light pen. This is included mainly for hobby users, to run the famous lunar lander game.

Physical PC terminal devices: (E11 for DOS)

Physical PC terminal devices: (E11 for Windows)

Physical PC terminal devices: (E11 for Linux)

Any two or more of the above port types may be combined and connected to the same emulated PDP-11 port, with output copied to all, and all input merged

Emulated PDP-11 terminal devices:

dev name controller types description E11 versions
LP: LP11, LPV11 line printer ports all
TT: DL11, DLV11 serial line units all
VR: VT30 raster graphics display all DOS
VT: VT11 vector graphics scope all DOS
YH: DH11 early DMA mux full
YJ: DJ11 early programmed I/O mux full
YM: DM11BB modem control option for DH11 full
YV: DHU11, DHQ11, DHV11, etc. microcomputer-based DMA mux full
YZ: DZ11, DZQ11, DZV11 programmed I/O mux all (as of V3.1)

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