After the main procedure is executed, the following values are obtained:

RESI $=$ This is not defined in the provided assembly code, so it cannot be determined.

SP $=16$A$2$H$.$ The stack pointer $($SP$)$ is decremented by $2$ each time a PUSH instruction is executed. Since there are three PUSH instructions before the CALL instruction, the SP is decremented by $6(3*2),$ so SP $=16$ACH $-6=16$A$2$H$.$

The number of memory blocks required from EPROMs and SRAMs is $4$ each. This is because $256$k $/64$k $=4.$

The typical range address of added EPROMs and SRAMs would be from $40000$H to $7$FFFFH and from C$0000$H to FFFFFH respectively.

The range of each memory block controlled by Ys is $64$k$.$

The memory decoding using $74138$ circuitries would involve connecting the $3$ select lines of the $74138$ to the $3$ most significant bits of the address bus. The $8$ output lines would then be connected to the enable lines of the $8$ memory blocks. This would allow each output line to select a different $64$k block of memory. Unfortunately, without a graphical interface, it's not possible to draw this circuit here.