hi rob;
i shall try to be little clearer this time.the bootloader or monitor programs are and were meant basically for PROM/EPROM types.directly developing your application by PROM method means lot of time consuming erase cycles.the solution is to transfer the code in ram and treat it like a program memory.

this means the same RAM chip shall be used for reading opcodes as well as standard purpose.this forces us to logically OR the PSEN and RD which is implemented by using a single AND gate.one needs to connect WR as well.

now the ROM resides at 00 and all the interrupts are diredcted to usual locations of 03/0b/13...however the user program when transferred from PC to this system is downloaded in above mentioned RAM(you can not write easily into ROM,that is why RAM in first place).

when execute command is given the monitor/bootloader actually jumps to this RAM space and starts execution.all interrupts are redirected towards this RAM space via the ROM code residing at respective locations.this location is dependent on board hardware config. and it need not be 0-7fff ROM and 8000-ffff RAM.
Pranav