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MasterSlaveMenu.asm@ 374

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Last change on this file since 374 was 369, checked in by gregli@…, 13 years ago

Removed align directives for initalization code and added define for align in boot-time calls to the assembly library (defaulting to 1), resulting in a significant savings for the AT and 386 builds. Fixed a bug with switch command line handling in the serial server. Put in CR characters in licesnse.txt, so that it properly displays on Windows. In the configurator, added default values for user supplied CHS and LBA values, defaulting to values within range when those features are enabled. Updated the copyright message in the configurator as the literal word Copyright is important.

File size: 16.4 KB

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1	; Project name : XTIDE Universal BIOS Configurator v2
2	; Description : "Master/Slave Drive" menu structs and functions.
3
4	; Section containing initialized data
5	SECTION .data
6
7	ALIGN WORD_ALIGN
8	g_MenupageForMasterSlaveMenu:
9	istruc MENUPAGE
10	at MENUPAGE.fnEnter, dw MasterSlaveMenu_EnterMenuOrModifyItemVisibility
11	at MENUPAGE.fnBack, dw IdeControllerMenu_EnterMenuOrModifyItemVisibility
12	at MENUPAGE.wMenuitems, dw 9
13	iend
14
15	g_MenuitemMasterSlaveBackToIdeControllerMenu:
16	istruc MENUITEM
17	at MENUITEM.fnActivate, dw IdeControllerMenu_EnterMenuOrModifyItemVisibility
18	at MENUITEM.szName, dw g_szItemDrvBackToIde
19	at MENUITEM.szQuickInfo, dw g_szItemDrvBackToIde
20	at MENUITEM.szHelp, dw g_szItemDrvBackToIde
21	at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE
22	at MENUITEM.bType, db TYPE_MENUITEM_PAGEBACK
23	iend
24
25	g_MenuitemMasterSlaveBlockModeTransfers:
26	istruc MENUITEM
27	at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI
28	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI
29	at MENUITEM.szName, dw g_szItemDrvBlockMode
30	at MENUITEM.szQuickInfo, dw g_szNfoDrvBlockMode
31	at MENUITEM.szHelp, dw g_szHelpDrvBlockMode
32	at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE \| FLG_MENUITEM_FLAGVALUE
33	at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE
34	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
35	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvBlockMode
36	at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag
37	at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans
38	at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_BLOCKMODE
39	iend
40
41	g_MenuitemMasterSlaveWriteCache:
42	istruc MENUITEM
43	at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI
44	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromUnshiftedItemInDSSI
45	at MENUITEM.szName, dw g_szItemDrvWriteCache
46	at MENUITEM.szQuickInfo, dw g_szNfoDrvWriteCache
47	at MENUITEM.szHelp, dw g_szHelpDrvWriteCache
48	at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE \| FLG_MENUITEM_MASKVALUE
49	at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE
50	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
51	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvWriteCache
52	at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiseWrCache
53	at MENUITEM.itemValue + ITEM_VALUE.rgwChoiceToValueLookup, dw g_rgwChoiceToValueLookupForWriteCache
54	at MENUITEM.itemValue + ITEM_VALUE.rgszChoiceToStringLookup, dw g_rgszChoiceToStringLookupForWriteCache
55	at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw MASK_DRVPARAMS_WRITECACHE
56	iend
57
58	g_MenuitemMasterSlaveUserCHS:
59	istruc MENUITEM
60	at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI
61	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI
62	at MENUITEM.szName, dw g_szItemDrvUserCHS
63	at MENUITEM.szQuickInfo, dw g_szNfoDrvUserCHS
64	at MENUITEM.szHelp, dw g_szHelpDrvUserCHS
65	at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE \| FLG_MENUITEM_MODIFY_MENU \| FLG_MENUITEM_FLAGVALUE
66	at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE
67	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
68	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvUserCHS
69	at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag
70	at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans
71	at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_USERCHS
72	at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw MasterSlaveMenu_WriteCHSFlag
73	iend
74
75	g_MenuitemMasterSlaveCylinders:
76	istruc MENUITEM
77	at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI
78	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI
79	at MENUITEM.szName, dw g_szItemDrvCyls
80	at MENUITEM.szQuickInfo, dw g_szNfoDrvCyls
81	at MENUITEM.szHelp, dw g_szNfoDrvCyls
82	at MENUITEM.bFlags, db NULL
83	at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED
84	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
85	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvCyls
86	at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1
87	at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 16383
88	%define MASTERSLAVE_CYLINDERS_DEFAULT 65
89	iend
90
91	g_MenuitemMasterSlaveHeads:
92	istruc MENUITEM
93	at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI
94	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI
95	at MENUITEM.szName, dw g_szItemDrvHeads
96	at MENUITEM.szQuickInfo, dw g_szNfoDrvHeads
97	at MENUITEM.szHelp, dw g_szNfoDrvHeads
98	at MENUITEM.bFlags, db FLG_MENUITEM_BYTEVALUE
99	at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED
100	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
101	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvHeads
102	at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1
103	at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 16
104	%define MASTERSLAVE_HEADS_DEFAULT 16
105	iend
106
107	g_MenuitemMasterSlaveSectors:
108	istruc MENUITEM
109	at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI
110	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI
111	at MENUITEM.szName, dw g_szItemDrvSect
112	at MENUITEM.szQuickInfo, dw g_szNfoDrvSect
113	at MENUITEM.szHelp, dw g_szNfoDrvSect
114	at MENUITEM.bFlags, db FLG_MENUITEM_BYTEVALUE
115	at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED
116	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
117	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvSect
118	at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1
119	at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 63
120	%define MASTERSLAVE_SECTORS_DEFAULT 63
121	iend
122
123	g_MenuitemMasterSlaveUserLBA:
124	istruc MENUITEM
125	at MENUITEM.fnActivate, dw Menuitem_ActivateMultichoiceSelectionForMenuitemInDSSI
126	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteLookupValueStringToBufferInESDIfromShiftedItemInDSSI
127	at MENUITEM.szName, dw g_szItemDrvUserLBA
128	at MENUITEM.szQuickInfo, dw g_szNfoDrvUserLBA
129	at MENUITEM.szHelp, dw g_szHelpDrvUserLBA
130	at MENUITEM.bFlags, db FLG_MENUITEM_VISIBLE \| FLG_MENUITEM_MODIFY_MENU \| FLG_MENUITEM_FLAGVALUE
131	at MENUITEM.bType, db TYPE_MENUITEM_MULTICHOICE
132	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
133	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvUserLBA
134	at MENUITEM.itemValue + ITEM_VALUE.szMultichoice, dw g_szMultichoiceBooleanFlag
135	at MENUITEM.itemValue + ITEM_VALUE.rgszValueToStringLookup, dw g_rgszValueToStringLookupForFlagBooleans
136	at MENUITEM.itemValue + ITEM_VALUE.wValueBitmask, dw FLG_DRVPARAMS_USERLBA
137	at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw MasterSlaveMenu_WriteLBAFlag
138	iend
139
140	g_MenuitemMasterSlaveUserLbaValue:
141	istruc MENUITEM
142	at MENUITEM.fnActivate, dw Menuitem_ActivateUnsignedInputForMenuitemInDSSI
143	at MENUITEM.fnFormatValue, dw MenuitemPrint_WriteUnsignedValueStringToBufferInESDIfromItemInDSSI
144	at MENUITEM.szName, dw g_szItemDrvLbaSectors
145	at MENUITEM.szQuickInfo, dw g_szNfoDrvLbaSectors
146	at MENUITEM.szHelp, dw g_szNfoDrvLbaSectors
147	at MENUITEM.bFlags, db NULL
148	at MENUITEM.bType, db TYPE_MENUITEM_UNSIGNED
149	at MENUITEM.itemValue + ITEM_VALUE.wRomvarsValueOffset, dw NULL
150	at MENUITEM.itemValue + ITEM_VALUE.szDialogTitle, dw g_szDlgDrvLbaSectors
151	at MENUITEM.itemValue + ITEM_VALUE.wMinValue, dw 1 ; 512 MiB
152	at MENUITEM.itemValue + ITEM_VALUE.wMaxValue, dw 10000000h / (1024 * 1024) ; Limit to 28-bit LBA
153	at MENUITEM.itemValue + ITEM_VALUE.fnValueReader, dw ValueReaderForUserLbaValue
154	at MENUITEM.itemValue + ITEM_VALUE.fnValueWriter, dw ValueWriterForUserLbaValue
155	%define MASTERSLAVE_USERLBA_DEFAULT 1
156	iend
157
158
159	g_rgwChoiceToValueLookupForWriteCache:
160	dw DEFAULT_WRITE_CACHE
161	dw DISABLE_WRITE_CACHE
162	dw ENABLE_WRITE_CACHE
163
164	g_rgszChoiceToStringLookupForWriteCache:
165	dw g_szValueBootDispModeDefault
166	dw g_szValueDrvWrCaDis
167	dw g_szValueDrvWrCaEn
168
169
170	; Section containing code
171	SECTION .text
172
173	;--------------------------------------------------------------------
174	; MasterSlaveMenu_InitializeToDrvparamsOffsetInBX
175	; Parameters:
176	; SS:BP: Menu handle
177	; Returns:
178	; Nothing
179	; Corrupts registers:
180	; AX
181	;--------------------------------------------------------------------
182	ALIGN JUMP_ALIGN
183	MasterSlaveMenu_InitializeToDrvparamsOffsetInBX:
184	lea ax, [bx+DRVPARAMS.wFlags]
185	mov [cs:g_MenuitemMasterSlaveBlockModeTransfers+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
186	mov [cs:g_MenuitemMasterSlaveWriteCache+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
187	mov [cs:g_MenuitemMasterSlaveUserCHS+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
188	mov [cs:g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
189
190	lea ax, [bx+DRVPARAMS.wCylinders]
191	mov [cs:g_MenuitemMasterSlaveCylinders+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
192
193	lea ax, [bx+DRVPARAMS.bHeads]
194	mov [cs:g_MenuitemMasterSlaveHeads+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
195
196	lea ax, [bx+DRVPARAMS.bSect]
197	mov [cs:g_MenuitemMasterSlaveSectors+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
198
199	lea ax, [bx+DRVPARAMS.dwMaximumLBA]
200	mov [cs:g_MenuitemMasterSlaveUserLbaValue+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset], ax
201	ret
202
203
204	;--------------------------------------------------------------------
205	; MasterSlaveMenu_EnterMenuOrModifyItemVisibility
206	; Parameters:
207	; SS:BP: Menu handle
208	; Returns:
209	; Nothing
210	; Corrupts registers:
211	; All, except BP
212	;--------------------------------------------------------------------
213	ALIGN JUMP_ALIGN
214	MasterSlaveMenu_EnterMenuOrModifyItemVisibility:
215	push cs
216	pop ds
217	call .EnableOrDisableUserCHSandLBA
218	call .EnableOrDisableCHandS
219	call .EnableOrDisableUserLbaValue
220	mov si, g_MenupageForMasterSlaveMenu
221	jmp Menupage_ChangeToNewMenupageInDSSI
222
223
224	;--------------------------------------------------------------------
225	; .EnableOrDisableUserCHSandLBA
226	; Parameters:
227	; SS:BP: Menu handle
228	; Returns:
229	; Nothing
230	; Corrupts registers:
231	; AX, BX
232	;--------------------------------------------------------------------
233	ALIGN JUMP_ALIGN
234	.EnableOrDisableUserCHSandLBA:
235	mov bx, [g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset]
236	call Buffers_GetRomvarsValueToAXfromOffsetInBX
237	test ax, FLG_DRVPARAMS_USERLBA
238	jnz SHORT .DisableCHSandEnableLBA
239	test ax, FLG_DRVPARAMS_USERCHS
240	jnz SHORT .EnableCHSandDisableLBA
241
242	; Enable both
243	mov bx, g_MenuitemMasterSlaveUserCHS
244	call .EnableMenuitemFromCSBX
245	mov bx, g_MenuitemMasterSlaveUserLBA
246	jmp .EnableMenuitemFromCSBX
247
248	ALIGN JUMP_ALIGN
249	.EnableCHSandDisableLBA:
250	mov bx, g_MenuitemMasterSlaveUserCHS
251	call .EnableMenuitemFromCSBX
252	mov bx, g_MenuitemMasterSlaveUserLBA
253	jmp .DisableMenuitemFromCSBX
254
255	ALIGN JUMP_ALIGN
256	.DisableCHSandEnableLBA:
257	mov bx, g_MenuitemMasterSlaveUserLBA
258	call .EnableMenuitemFromCSBX
259	mov bx, g_MenuitemMasterSlaveUserCHS
260	jmp .DisableMenuitemFromCSBX
261
262
263	;--------------------------------------------------------------------
264	; .EnableOrDisableCHandS
265	; Parameters:
266	; SS:BP: Menu handle
267	; Returns:
268	; Nothing
269	; Corrupts registers:
270	; AX, BX
271	;--------------------------------------------------------------------
272	ALIGN JUMP_ALIGN
273	.EnableOrDisableCHandS:
274	mov bx, [cs:g_MenuitemMasterSlaveUserCHS+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset]
275	call Buffers_GetRomvarsValueToAXfromOffsetInBX
276	test ax, FLG_DRVPARAMS_USERCHS
277	jz SHORT .DisableCHandS
278	test ax, FLG_DRVPARAMS_USERLBA
279	jnz SHORT .DisableCHandS
280
281	mov bx, g_MenuitemMasterSlaveCylinders
282	call .EnableMenuitemFromCSBX
283	mov bx, g_MenuitemMasterSlaveHeads
284	call .EnableMenuitemFromCSBX
285	mov bx, g_MenuitemMasterSlaveSectors
286	jmp SHORT .EnableMenuitemFromCSBX
287
288	ALIGN JUMP_ALIGN
289	.DisableCHandS:
290	mov bx, g_MenuitemMasterSlaveCylinders
291	call .DisableMenuitemFromCSBX
292	mov bx, g_MenuitemMasterSlaveHeads
293	call .DisableMenuitemFromCSBX
294	mov bx, g_MenuitemMasterSlaveSectors
295	jmp SHORT .DisableMenuitemFromCSBX
296
297
298	;--------------------------------------------------------------------
299	; .EnableOrDisableUserLbaValue
300	; Parameters:
301	; SS:BP: Menu handle
302	; Returns:
303	; Nothing
304	; Corrupts registers:
305	; AX, BX
306	;--------------------------------------------------------------------
307	ALIGN JUMP_ALIGN
308	.EnableOrDisableUserLbaValue:
309	mov bx, [cs:g_MenuitemMasterSlaveUserLBA+MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset]
310	call Buffers_GetRomvarsValueToAXfromOffsetInBX
311	mov bx, g_MenuitemMasterSlaveUserLbaValue
312	test ax, FLG_DRVPARAMS_USERCHS
313	jnz SHORT .DisableMenuitemFromCSBX
314	test ax, FLG_DRVPARAMS_USERLBA
315	jz SHORT .DisableMenuitemFromCSBX
316	; Fall to .EnableMenuitemFromCSBX
317
318
319	;--------------------------------------------------------------------
320	; .EnableMenuitemFromCSBX
321	; .DisableMenuitemFromCSBX
322	; Parameters:
323	; CS:BX: Ptr to MENUITEM
324	; Returns:
325	; Nothing
326	; Corrupts registers:
327	; Nothing
328	;--------------------------------------------------------------------
329	ALIGN JUMP_ALIGN
330	.EnableMenuitemFromCSBX:
331	or BYTE [cs:bx+MENUITEM.bFlags], FLG_MENUITEM_VISIBLE
332	ret
333
334	ALIGN JUMP_ALIGN
335	.DisableMenuitemFromCSBX:
336	and BYTE [cs:bx+MENUITEM.bFlags], ~FLG_MENUITEM_VISIBLE
337	ret
338
339
340	;--------------------------------------------------------------------
341	; MENUITEM value reader functions
342	; Parameters:
343	; AX: Value from MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset
344	; DS:SI: Ptr to MENUITEM
345	; ES:DI: Ptr to value variable
346	; Returns:
347	; AX: Value with possible modifications
348	; Corrupts registers:
349	; Nothing
350	;--------------------------------------------------------------------
351	ALIGN JUMP_ALIGN
352	ValueReaderForUserLbaValue:
353	push dx
354
355	mov ax, [es:di]
356	mov dx, [es:di+2] ; DX:AX now holds user defined LBA28 limit
357	add ax, BYTE 1 ; Increment by one
358	adc dx, BYTE 0
359
360	xchg ax, dx ; SHR 16
361	eSHIFT_IM ax, 4, shr ; SHR 4 => AX = DX:AX / (1024*1024)
362
363	pop dx
364	ret
365
366
367	;--------------------------------------------------------------------
368	; MENUITEM value writer functions
369	; Parameters:
370	; AX: Value to be written to MENUITEM.itemValue+ITEM_VALUE.wRomvarsValueOffset
371	; DS:SI: Ptr to MENUITEM
372	; ES:DI: Ptr to value variable
373	; Returns:
374	; AX: Value to be stored
375	; Corrupts registers:
376	; Nothing
377	;--------------------------------------------------------------------
378	ALIGN JUMP_ALIGN
379	ValueWriterForUserLbaValue:
380	push dx
381
382	xor dx, dx
383	eSHIFT_IM ax, 4, shl
384	xchg dx, ax ; DX:AX now holds AX * 1024 * 1024
385
386	sub ax, BYTE 1 ; Decrement DX:AX by one
387	sbb dx, BYTE 0 ; (necessary since maximum LBA28 sector count is 0FFF FFFFh)
388
389	mov [es:di+2], dx ; Store DX by ourselves
390	pop dx
391	ret ; AX will be stored by our menu system
392
393	;
394	; No change to CHS flag, but we use this opportunity to change defaults stored in the CHS values if we are
395	; changing in/out of user CHS settings (since we use these bytes in different ways with the LBA setting).
396	;
397	ALIGN JUMP_ALIGN
398	MasterSlaveMenu_WriteCHSFlag:
399	test word [es:di], FLG_DRVPARAMS_USERCHS
400	jnz .alreadySet
401
402	push ax
403	push di
404	push si
405
406	mov ax, MASTERSLAVE_CYLINDERS_DEFAULT
407	mov si, g_MenuitemMasterSlaveCylinders
408	call Menuitem_StoreValueFromAXtoMenuitemInDSSI
409
410	mov ax, MASTERSLAVE_HEADS_DEFAULT
411	mov si, g_MenuitemMasterSlaveHeads
412	call Menuitem_StoreValueFromAXtoMenuitemInDSSI
413
414	mov ax, MASTERSLAVE_SECTORS_DEFAULT
415	mov si, g_MenuitemMasterSlaveSectors
416	call Menuitem_StoreValueFromAXtoMenuitemInDSSI
417
418	pop si
419	pop di
420	pop ax
421
422	.alreadySet:
423	ret
424
425	;
426	; No change to LBA flag, but we use this opportunity to change defaults stored in the LBA value if we are
427	; changing in/out of user LBA settings (since we use these bytes in different ways with the CHS setting).
428	;
429	ALIGN JUMP_ALIGN
430	MasterSlaveMenu_WriteLBAFlag:
431	test word [es:di], FLG_DRVPARAMS_USERLBA
432	jnz .alreadySet
433
434	push ax
435	push di
436	push si
437
438	mov ax, MASTERSLAVE_USERLBA_DEFAULT
439	mov si, g_MenuitemMasterSlaveUserLbaValue
440	call Menuitem_StoreValueFromAXtoMenuitemInDSSI
441
442	pop si
443	pop di
444	pop ax
445
446	.alreadySet:
447	ret

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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Menupages/MasterSlaveMenu.asm@ 374

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