VECTOR 4/8086 - Data Tables and StringsFrom Inside a Vector Graphic SX/5000 (Vector 4/8086 variant)

Related: Memory map · Winchester parameters · Quick reference

Source: V2_AC_Interleaved_XHE_XHO.bin

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Jump / service vectors @ 0000

Off	Bytes	Instruction	Role
0000	C3 36 00	JP 0036	Cold reset
0003	C3 4F 01	JP 014F	Main menu
0006	C3 D5 03	JP 03D5	Keyboard status
0009	C3 DA 03	JP 03DA	Keyboard data
000C	C3 43 04	JP 0443	Putchar
000F	C3 00 10	JP 1000	Floppy load
0012	C3 66 10	JP 1066	Winchester load
0015	C9	RET
0016	00 00	NOP NOP
0018	C3 34 14	JP 1434	Geometry + restore
001B	C3 A8 14	JP 14A8	Read sectors
001E	C3 C0 03	JP 03C0	Config copy
0021	C3 20 04	JP 0420	Bank helper
0024	C3 B1 12	JP 12B1	Config @6600
0027	C3 FB 12	JP 12FB	Config @6660
002A	C3 A9 13	JP 13A9	Type21 handoff
002D	C3 5D 15	JP 155D	HW error print
0030	C3 C0 11	JP 11C0	Sys error print
0033	C3 2B 01	JP 012B	Auto-boot

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Menu key table @ 07F4 (3 entries × key + addr)

07F4: 46 00 10   'F' → 1000h  floppy
07F7: 54 B2 01   'T' → 01B2h  continuous test
07FA: 57 66 10   'W' → 1066h  Winchester

N / S appear in banner text only — not in this table.

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Cold I/O init @ 07FD (14 × port,value)

Port	Value(s)
9D	00
98	00
9B	14, 19, 0A, 0B
91	FF, FF
70	00
9A	00
1A	1B, then later 80
1B	F8, 03

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Floppy geometry table @ 0831

Used only when 1434 has unit A ≥ 3 (floppy). Winchester uses header geometry instead — see winchester-parameters.md.

Search key in B; 4-byte records (key + 3 params):

Key	Params	Notes
FA	09 04 50
FB	08 04 50
FC	09 03 28
FD	09 05 28
FE	08 03 28	Default floppy B=FEh at 1009
FF	08 05 28

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CRTC-style regs (ports 0E/0F) from @ 0819–0826

Programmed high-to-low, R13…R0 (values written order starts at 0826):

Reg	Value
R0	31
R1	28
R2	2A
R3	85
R4	19
R5	02
R6	18
R7	18
R8	10
R9	0C
R10	00
R11	00
R12	38
R13	00

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ROM config @ 09AA

Addr	Dump	Role
09AA	C8	Nonzero → show [W], enable auto-boot path
09AB–09AC	00 00	Drive id slots
09AD	07	Floppy slot id (12FB checks ==07)
09AE–09B1	00…
09B2–09B7	FA…FF	Geometry/media keys

Templates for 12FB (12 bytes each):

Addr	Bytes
@09B9	88 00 00 00 00 40 01 00 00 01 04 FE
@09C6	80 00 00 00 00 40 01 00 00 02 04 FE

Full drive-id / unit-0 decode: winchester-parameters.md.

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SYSTEM header (disk LBA 0 @ RAM 2400)

Off	Field
+00	Word; simple boot requires ≠0; execute at 2400
+02	Format id 02h
+0B	Config id
+0D	Sectors per alloc block
+11	Directory entry count
+15	Geometry key B
+16	Dir LBA factor
+1E	11-byte SYSTEM FILE name
+42	Flags 10xxxxxx; type in low 6 bits (21h = file load)
+4C	Config / DPH-like records

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Major strings (bit-7 terminated)

Addr	Text
0585	title control + VECTOR GRAPHIC SX/5000 [XH]
05A8	EXECUTIVE - REVISION 2.00 (AC)
05D2	[W] .. LOAD SYSTEM FROM WINCHESTER
05FA	[F] .. LOAD SYSTEM FROM FLOPPY
061A	[N] .. LOAD SYSTEM FROM NETWORK
063C	[S] .. LOAD SYSTEM FROM SPECIFIC STATION
0667	[T] .. TEST SYSTEM
067E	MAIN MEMORY NOT INSTALLED - HALTING
06A4	PERFORMING CONTINUOUS SYSTEM TEST - CYCLE
06CF	PERFORMING SYSTEM TEST
06E8	LOADING - PLEASE WAIT
0849+	system error messages
08EF+	hardware error messages
097B	< ERROR -
0988	>

Printer: 03E4 — BIT 7,A / RES 7,A; last char has bit 7 set.