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Old 05 August 2017, 22:07   #1
Toni Wilen
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68881 FPU FMOVECR test

Another test, this time hardware requirements are: real Amiga with 68020 or 68030 + 68881 FPU. (I only have 68882)

Run attached program (source also included), it creates 4096 byte file named fmovecr.bin in current directory, attach or email the file.

FMOVECR has many undocumented constants and I'd like to know if they are mostly same as in 68882 (most undocumented fields are zeros in 68882) or totally different.

EDIT: Test updated, more information includes (16k output now)
Attached Files
File Type: zip fmovecrtest.zip (970 Bytes, 111 views)

Last edited by Toni Wilen; 07 August 2017 at 19:43. Reason: Test updated
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Old 05 August 2017, 22:27   #2
Matt_H
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If you were not already aware, a bit of work has been done in this area. See: http://aminet.net/package/misc/misc/fmovecr_dump

Perhaps you and the other author can compare notes
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Old 05 August 2017, 22:32   #3
Toni Wilen
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Yes, I know but it does it wrong, it returns rounded values.
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Old 06 August 2017, 12:05   #4
Toni Wilen
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I forgot (not the first time) that I have A500 68020 accelerator with 68881 (Apollo 520). Unexpectedly all FMOVECR offsets are 100% identical to 68882.

Test results still accepted for confirming this 100%. (If there are different revisions)
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