If written on a Series 64, 68 or 70, or on the Series 37 or it's successors, the first file on a SYSDUMP (Backup) tape may include the Microcode from the WCS (Writeable Control Store). Please collect such files if you have tapes available that you can read. Note that the first file includes a concatenation of system objects, ending with (optionally) the directory so that may leak data that should remain private. It's possible that the distribution tape for MPE V Release 3P G.40 that the HP Computer Museum has http://www.hpmuseum.net/display_item.php?sw=442 might also include the WCS data. The bootable disc image for the Series 37 and it's successors will. The Museum website doesn't mention media for their 68. Thanks as always to Al Kossow for his BitSavers work. 30140-90045_Series_64_68_70_Microcode_Manual_Oct86.pdf has a 543 page listing of the microcode assembly output, which should wait for better OCR software. SYSDUMP Format ? |-------------------------| <--- ENTRY POINT #1 (ROM BASED ? |????? CHECKSUM?????????? | 0??? MACHINES) ? |? AMIGO CHANNEL PROGRAM? | --|??? WCS TABLE PRT??????? | 95 | |-------------------------| 127 | |--???????????????????? --| | |--?? AMIGO???????????? --| | |-------------------------| ->|???? WCS TABLE?????????? | | |-------------------------| ... G.01.00 16- 10 32033-90010_MPE_V-E_Tables_G.00.00_Sep84.pdf? 16-7? pg 127 in PDF 32033-90040_MPE_V-E_Tables_G.01.00_Jan85.pdf? 16-10 pg 133 in PDF 32033-91047_MPE_V_Tables_Manual_Oct1991.pdf?? 16-10 pg 146 in PDF Descriptions of the WCS Table Format are in 16-13 to 16-15 of the 1991 edition Different formats for the Series 6x/70 and the Series 37, 37XP and 37 Micro #Capture of Co-Cam's Series 52 final full backup (SYSDUMP @. at .@) in Feb 1995. (So no WCS table entry) # 0 is the first file on the tape, the start of which is documented above $ od -Ad --endian=big -tx2 0 | head - 40 0000000 e0e0 0000 0009 0813 0909 0301 0003 0000 0000016 0400 0e41 0180 0002 0501 0000 0000 fff5 0000032 0401 0001 0000 0400 0e43 0200 0000 0501 0000048 0000 0000 ffea 0300 007e 0440 8000 0200 0000064 0000 0002 0000 fff1 0407 0001 0000 4400 0000080 0e43 0302 0002 0000 0400 0e40 0200 0000 0000096 0501 0000 f38d ffd1 0000 0000 0000 0000 0000112 0000 0000 0000 0000 0000 0000 0000 0000 * 0000176 0000 0000 0000 0000 0000 0000 0000 0001 0000192 0000 0000 0000 0000 0000 0000 0000 0000 * 0000256 0000 0000 0009 0813 0909 0301 0003 0000 0000272 0400 0201 0180 0002 0401 002e 0001 8800 0000288 0204 0f07 0000 0200 0000 0501 0000 0000 0000304 ffec 0000 fff1 0401 0001 0000 0400 0203 0000320 0200 0000 0501 0000 0000 ffdf 0300 0100 0000336 0440 8000 0e40 0000 0002 0000 fff1 0407 0000352 0001 0000 4400 0203 0302 0002 0000 0400 0000368 0200 0200 0000 0501 0000 0c02 ffc6 0000 0000384 0000 002d 0000 0000 0000 002d 0000 0000 * 0000416 000a 0000 f000 000c 000b 0016 f000 0017 0000432 000b 000b f000 0022 000b 0000 f000 0000 0000448 0000 002d 0000 0000 0000 002d 0000 0000 * 0000624 0000 002d 0000 0000 0000 002d 0000 3238 0000640 3333 4120 2020 0000 1820 0000 1000 15d8 0000656 2eb4 0000 0000 0000 0000 0000 0000 0000 0000672 0000 0000 0000 0000 0000 0000 0000 0000 ... $ head -20 blks/0.blks # tape block sizes in bytes 256 126 256 * 2 8192 * 6 256 8192 * 2 256 126 256 8192 * 10 256 8192 * 10 256 8192 * 10 256 96 2910 80 24 $ ls -lh 0 -r-xr-xr-x 1 rdb rdb 3.5M Dec 12? 2006 0