There was enough resources to put my ANSI Terminal into the FPGA. It displays on a VGA monitor and input comes from a PS/2 keyboard. The ANSI Terminal uses my IOP16 CPU. The terminal connects via an internal 9600 baud serial connection.

The IOP16 code is pretty simple. The only "tricky" part is adding MARK parity when sending serial data to the PDP-8 serial in and stripping off the MARK parity when sending the data out of the PDP-8 into the VDU.

000            0x2003    LRI    Reg0    0X03    RESET TERMINAL COMMAND    
001            0x7002    IOW    Reg0    IO_02   WRITE VDU CMD REG    
002            0x2003    LRI    Reg0    0X03    RESET UART COMMAND    
003            0x7000    IOW    Reg0    IO_00   WRITE UART CMD REG    
004            0x2020    LRI    Reg0    0X20    TX CTRLS RTS    
005            0x7002    IOW    Reg0    IO_02   WRITE VDU CMD REG    
006            0x2020    LRI    Reg0    0X20    TX CTRLS RTS    
007            0x7000    IOW    Reg0    IO_00   WRITE UART CMD REG    
008   START    0xA00B    JSR    KB2PDP          KEYBOARD TO PDP-8    
009            0xA012    JSR    PDP2VDU         PDP-8 TO VGA    
00a            0xE008    JMP    START           LOOP FOREVER    
00b   KB2PDP   0x6004    IOR    Reg0    IO_04   READ KBD STATUS    
00c            0x8001    ARI    Reg0    0X01    MASK RX DATA PRESENT BIT    
00d            0xC004    BEZ    NOKDBD          NO KBD DATA    
00e            0x6005    IOR    Reg0    IO_05   READ KBD DATA    
00f            0x9080    ORI    Reg0    0X80    MARK PARITY    
010            0x7001    IOW    Reg0    IO_01   WRITE TO UART DATA    
011   NOKDBD   0xB000    RTS                    DONE KEYBOARD TO UART    
012   PDP2VDU  0x6000    IOR    Reg0    IO_00   PDP-11 TO VDU    
013            0x8001    ARI    Reg0    0X01    MASK RX DATA PRESENT BIT    
014            0xC004    BEZ    NOPDPD          NO UART DATA    
015            0x6001    IOR    Reg0    IO_01   READ UART DATA    
016            0x807F    ARI    Reg0    0X7F    8 TO 7 BITS    
017            0x7003    IOW    Reg0    IO_03   WRITE OUT SCREEN    
018   NOPDPD   0xB000    RTS                    DONE UART TO VGA