I downloaded the MARIE simulator from a site that is no longer available and wrote a small program which just declares an array of hexadecimal numbers and then attempts to retrieve one of those numbers using the address.
The problem is that the assembler complains that loadi is not a recognized instruction. If I use load rather than loadi, it will assemble and run and print the expected output (the address of the value I want).
I believe loadi should work and is the instruction I need because of my previous understanding of it which is that it will load the value found at the address given by the operand, as well as some documentation I found on sites like this one and this one.
Why is loadi not recognized? Am I doing something wrong? Maybe there are different versions of MARIE with varying support for some of the instructions?
My MARIE code:
ORG 0
JUMP start
BADDR, hex 0003 / Date_B = 0003
EADDR, hex 001A / Date_E = 001A
/ data section begins
Data_B, hex 0102 / data begin address 3
hex 0105 / dec 261
hex 0106 / dec 262
hex 0108 / dec 264
hex 011A / dec 282
hex 0120 / dec 288
hex 0225 / dec 549
hex 0230 / dec 560 10
hex 0231 / dec 561
hex 0238 / dec 568
hex 0339 / dec 825
hex 0350 / dec 848
hex 0459 / dec 1113 000F
hex 055F / dec 1375
hex 066A / dec 1642
hex 0790
hex 08AB
hex 09AF
hex 0AB9
hex 0BBD
hex 0CC1
hex 0DCA
hex 0EFE / 0019
Data_E, hex 0FFE / data end address 001A
Count, dec 24 / the number of data
start, loadi mid
output
halt
mid, hex 000F / starting mid point
The problem was in fact that the particular version of MARIE I was using did not support the instruction. I downloaded the MARIE simulator from a different site and it works great. Problem solved.