The code jumped to from intercept at beginning of subtract

The top two words are for BLWP instruction, first WP=>8000 and then the memory copy routine at >1364. It copies scratchpad from >8300 to >8100. This would not work on a regular TI, but my FPGA system has 1 kilobyte scratchpad.
My FPGA desing incorrectly displays sprites even on top of text mode, hence the strange colored blocks on screen.