My Reddit Post on this:
https://www.reddit.com/r/vintagecomputing/com … correction_kit/

All my retro computing @ archive.org (documents & retro stuff)
https://archive.org/details/@aazard

NOTE ABOUT "Original" EMS CARDS (& "Hangs" using them, with the Buss Correction Kit):
THE BUSS CORRECTION KIT "BORKING" THE SIGINAL IT EXPECTS!
Work-around: Use a "normal" EMS Board, I suggest "PicoMEM 8-Bit ISA Card - 1MB RAM + 4MB EMS RAM+ USB Support + NE2000 Network + Wifi", its "modern" and faster than any era EMS card (even faster than the AT&T-specific, AST-made, EEMS 3.2 board "running as it expects" on the "wacky" buss). If your already have 640kb+ conventional memory, it becomes a 5MB EMS Card!

See quote:
"EMS boards are slow in the 6300 unless you get the AT&T-specific, AST-made, EEMS 3.2 board, which uses the proprietary 16-bit wacky interface unique to the AT&T, and then the EMS memory is the same speed as the main memory"
... 16 bit wacky interface ... this refers to the "non-standard" (pre-standards) buss I am 99.9% sure

///

Topic and Schematics to make one found here, VERY EASY:
https://forum.vcfed.org/index.php?threads/wan … 762/post-433887

Official "Olivetti M24 / Persona 1600 / AT&T 6300" Service Manual & Schematics:
https://archive.org/details/m-24-att-6300-psg
W. Allen Associates Buss Correction Kit - PROMS 82S123 & 82S147 (v1.23 & v1.47):
https://archive.org/details/82-s-147

Driver Files:
https://archive.org/details/wallen_202209

Documents/info:
https://archive.org/details/w-allen-associate … -correction-kit
https://archive.org/details/w-allen-associates-product-page
https://archive.org/details/w-allen-associate … ore-information

EPROM + 22V10:
EPROM: http://www.mouser.com/ProductDetail...=sGAEpi … IygsdF2bKiN2Ts=
22V10: http://www.mouser.com/ProductDetail...=sGAEpi … YkOHHDm46oovr4=
Both are in full production, not NRND.

Original PROM (82S123 - PQB1) on the bus converter Code:

100000000  F3F3 F3DB D8D8 98D8 DCD9 DBD3 D2D2 9242  óóóÛØؘØÜÙÛÓÒÒ’B
200000010  F3F3 F3D1 D0D0 90D0 4444 4444 4444 4444  óóóÑÐÐ.ÐDDDDDDDD

BIOS 1.43 Code:

10000   F3 F3 F3 DB D8 DC 9C DC  D8 D9 DB D3 D2 D2 92 42
20010   F3 F3 F3 D1 D0 D4 94 D4  44 44 44 44 44 44 44 44

Pin-out Code:

1       ._____    _____.
2       |     \__/     |
3   CLK |  1        24 | Vcc
4       |  2        23 | o7
5       |  3        22 | o6
6    a0 |  4        21 | o5
7    a1 |  5        20 | o4
8    a2 |  6        19 | o3
9    a3 |  7        18 | o1
10    a4 |  8        17 | o2
11    a5 |  9        16 | o0
12    ce | 10        15 |
13    a6 | 11        14 |
14   gnd | 12        13 | a7
15       |______________|

I dont save the retro computing world everyday, but today....