How to connect a modem to a spec without unnecessary details

Press RESET immediately, All! If the ISA modem is set to COM4, it will receive the address 0x2e8, that is, by bit (devices on the ISA bus are decrypted by the least significant 10 bits): A0 x\n A1 x | modem register selection A2x/ A3 1 A4 0 A5 1 A6 1 A7 1 A8 0 A9 1 Thus, the modem is decrypted by 5 inputs in state 1 and by 2 inputs in state 0. The modem also has inputs IORD and IOWR (active level - 0). Connection diagram looms extremely simple, made from just wires: IORQ from Spectrum to A8 modem RD from Spectrum to modem IORD WR from Spectrum to IOWR modem A4 (or A3?) from Spectrum to A4 modem A8, A9 and A10 from Spectrum to A0, A1 and A2 modem AEN, A3, A5, A6, A7, A9 modems at +5v. ALL! The result is a Kondratiev scheme without interruptions!