Fix Type 1 AMF bitfield and add real FIR/IIR test ROMs

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- Fix Type 1 multifunction: AMF=bits17-13, DD=bits19-18, PD=bits21-20
  (was off by one bit, causing wrong MAC decode on real firmware)
- Add FIR filter ROM (fir.bin): 52 instructions, assembled from AD example
- Add IIR biquad ROM (iir.bin): 28 instructions, assembled from AD example
- Add open21xx-compatible source files (build/fir.dsp, build/iir.dsp)
- Both ROMs disassemble correctly showing expected DSP patterns:
  MAC+dual-read kernels, DO UNTIL loops, ASHIFT scaling, RTS(DB)
- Full regression: isa_test.bin unchanged

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This commit is contained in:

Dr. Christian Giessen

2026-04-22 19:47:12 +00:00

parent 13521048bc

commit 6849a701d4

9 changed files with 126 additions and 4 deletions

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