loadprogram-VSX-L-RELOA.bin — the UNPATCHED disc LOAD PROGRAM, as shipped¶

192 words (0300B), big-endian, taken out of the SINTRAN III/VSX version L distribution floppy, not off a disc.


sha256	`d4438d3183f28578a5fa705f030b2bb6054388edef27a4037d2978ff6423f13d`
size	384 bytes = 192 words = `0300B`
ND-100 load address	`062417B .. 062716B`
symbol	`RELOA` (`062417`) … `LDEND` (`062717`)
source file	`SINTRAN-L-1:DATA` inside `D:\ND\S\VSXL1.IMG`
BPUN record	record #2 of 22, `)9READ` at file offset 29151, load address `026000B`, `144001B` words, checksum verified
file offset of `RELOA` inside `SINTRAN-L-1.DATA`	58370

How it was extracted¶

ndtool -x -o R1 D:\ND\S\VSXL1.IMG            # NOTE: no -p, parity strip destroys binaries
python tools/decode_9read.py R1/SINTRAN-L-1.DATA --region 1 062417 0300 reloa-L.bin

Why this is the disc bootstrap¶

RELOA=062417 / LDEND=062717 are in the shipped symbol table NDInsight/SINTRAN/NPL-SOURCE/SYMBOLS/L07/SYMBOL-2-LIST.SYMB.TXT.
The code matches PH-P2-OPPSTART.NPL (% "LOAD" PROGRAM, label RELOA) instruction for instruction.
It is unpatched: KLIOX still holds the literal source value IOX 4 (164004) and the parameter block NOBLK/ADR2B/DYBLS/LDRAD/XSWTP/YSWTY (062510B..062516B) is all zero.
Word-diffed against a real installed L-version SMD system disc (D:\ND\HDD\BIGDISK0-L.IMG, page-0 sha8 ec962fc2) the two agree in 176 of the first 192 words; the 16 that differ are exactly the words SINTRAN patches at COLD-START — including KLIOX 164004 -> 165544 (IOX 1544 = SMD HDEV 1540 + 4), KLHDE 0 -> 001540, YSWTY 0 -> 1 ("big disc"), KLRC1 0 -> 177774 (= -4).

See ../DISC-BOOTSTRAP.md for the full write-up.