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Buffers.asm@ 616

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Last change on this file since 616 was 614, checked in by Krister Nordvall, 3 years ago

Changes:

BIOSDRVS should now build again (broke in r613).
Removed the NO_ATAID_CORRECTION define from the Tiny build.
Added a new configuration option to skip detection of slave drives.
Made FLASH_SIGNATURE 2 bytes shorter to free up ROM space.
"Auto Configure" in XTIDECFG should now detect if running on an Olivetti M24, AT&T PC6300, Xerox 6060 or Logabax Persona 1600 and automatically select the fastest compatible transfer mode/device type for any IDE controllers found in the system.
Cleaned out some duplicate/unused definitions.

File size: 9.2 KB

Line
1	; Project name : XTIDE Universal BIOS Configurator v2
2	; Description : Functions for accessing file and flash buffers.
3
4	;
5	; XTIDE Universal BIOS and Associated Tools
6	; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
7	;
8	; This program is free software; you can redistribute it and/or modify
9	; it under the terms of the GNU General Public License as published by
10	; the Free Software Foundation; either version 2 of the License, or
11	; (at your option) any later version.
12	;
13	; This program is distributed in the hope that it will be useful,
14	; but WITHOUT ANY WARRANTY; without even the implied warranty of
15	; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	; GNU General Public License for more details.
17	; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
18	;
19
20	; Section containing code
21	SECTION .text
22
23	;--------------------------------------------------------------------
24	; Buffers_Clear
25	; Parameters:
26	; Nothing
27	; Returns:
28	; Nothing
29	; Corrupts registers:
30	; AX, CX, DI, ES
31	;--------------------------------------------------------------------
32	ALIGN JUMP_ALIGN
33	Buffers_Clear:
34	call Buffers_GetFileBufferToESDI
35	mov cx, ROMVARS_size
36	jmp Memory_ZeroESDIwithSizeInCX
37
38
39	;--------------------------------------------------------------------
40	; Buffers_IsXtideUniversalBiosLoaded
41	; Parameters:
42	; Nothing
43	; Returns:
44	; ZF: Set if supported version of XTIDE Universal BIOS is loaded
45	; Cleared if no file or some other file is loaded
46	; Corrupts registers:
47	; CX, SI, DI, ES
48	;--------------------------------------------------------------------
49	ALIGN JUMP_ALIGN
50	Buffers_IsXtideUniversalBiosLoaded:
51	test BYTE [cs:g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_FILELOADED \| FLG_CFGVARS_ROMLOADED
52	jnz SHORT .FileOrBiosLoaded
53	test sp, sp ; Clear ZF
54	ret
55
56	.FileOrBiosLoaded:
57	call Buffers_GetFileBufferToESDI
58	; Fall to Buffers_IsXtideUniversalBiosSignatureInESDI
59
60
61	;--------------------------------------------------------------------
62	; Buffers_IsXtideUniversalBiosSignatureInESDI
63	; Parameters:
64	; ES:DI: Ptr to possible XTIDE Universal BIOS location
65	; Returns:
66	; ZF: Set if supported version of XTIDE Universal BIOS is loaded
67	; Cleared if no file or some other file is loaded
68	; Corrupts registers:
69	; CX, SI
70	;--------------------------------------------------------------------
71	ALIGN JUMP_ALIGN
72	Buffers_IsXtideUniversalBiosSignatureInESDI:
73	push di
74
75	mov si, g_sXtideUniversalBiosSignature
76	add di, BYTE ROMVARS.rgbSign
77	mov cx, XTIDE_SIGNATURE_LENGTH / 2
78	%ifdef CLD_NEEDED
79	cld
80	%endif
81	eSEG_STR repe, cs, cmpsw
82
83	pop di
84	ret
85
86
87	;--------------------------------------------------------------------
88	; Buffers_IsXTbuildLoaded
89	; Parameters:
90	; Nothing
91	; Returns:
92	; ZF: Set if XT or XT+ build is loaded
93	; Cleared if some other (AT, 386) build is loaded
94	; Corrupts registers:
95	; Nothing
96	;--------------------------------------------------------------------
97	ALIGN JUMP_ALIGN
98	Buffers_IsXTbuildLoaded:
99	%strlen BUILD_TYPE_OFFSET TITLE_STRING_START
100	push es
101	push di
102	call Buffers_GetFileBufferToESDI
103	cmp WORD [es:di+ROMVARS.szTitle+BUILD_TYPE_OFFSET+1], 'XT' ; +1 is for '('
104	pop di
105	pop es
106	ret
107	%undef BUILD_TYPE_OFFSET
108
109
110	;--------------------------------------------------------------------
111	; Buffers_NewBiosWithSizeInDXCXandSourceInALhasBeenLoadedForConfiguration
112	; Parameters:
113	; AL: EEPROM source (FLG_CFGVARS_FILELOADED or FLG_CFGVARS_ROMLOADED)
114	; DX:CX: EEPROM size in bytes
115	; Returns:
116	; Nothing
117	; Corrupts registers:
118	; CX, DX
119	;--------------------------------------------------------------------
120	ALIGN JUMP_ALIGN
121	Buffers_NewBiosWithSizeInDXCXandSourceInALhasBeenLoadedForConfiguration:
122	and BYTE [cs:g_cfgVars+CFGVARS.wFlags], ~(FLG_CFGVARS_FILELOADED \| FLG_CFGVARS_ROMLOADED \| FLG_CFGVARS_UNSAVED)
123	or [cs:g_cfgVars+CFGVARS.wFlags], al
124	shr dx, 1
125	rcr cx, 1
126	adc cx, BYTE 0 ; Round up to next WORD
127	mov [cs:g_cfgVars+CFGVARS.wImageSizeInWords], cx
128	ret
129
130
131	;--------------------------------------------------------------------
132	; Buffers_SetUnsavedChanges
133	; Buffers_ClearUnsavedChanges
134	; Parameters:
135	; SS:BP: Menu handle
136	; Returns:
137	; Nothing
138	; Corrupts registers:
139	; Nothing
140	;--------------------------------------------------------------------
141	ALIGN JUMP_ALIGN
142	Buffers_SetUnsavedChanges:
143	or BYTE [cs:g_cfgVars+CFGVARS.wFlags], FLG_CFGVARS_UNSAVED
144	ret
145
146	ALIGN JUMP_ALIGN
147	Buffers_ClearUnsavedChanges:
148	and BYTE [cs:g_cfgVars+CFGVARS.wFlags], ~FLG_CFGVARS_UNSAVED
149	ret
150
151
152	;--------------------------------------------------------------------
153	; Buffers_SaveChangesIfFileLoaded
154	; Parameters:
155	; Nothing
156	; Returns:
157	; Nothing
158	; Corrupts registers:
159	; AX, BX, CX, SI, DI
160	;--------------------------------------------------------------------
161	ALIGN JUMP_ALIGN
162	Buffers_SaveChangesIfFileLoaded:
163	mov al, [cs:g_cfgVars+CFGVARS.wFlags]
164	and al, FLG_CFGVARS_FILELOADED \| FLG_CFGVARS_UNSAVED
165	jz SHORT .NothingToSave
166	jpo SHORT .NothingToSave
167	mov bx, g_szDlgSaveChanges
168	call Dialogs_DisplayYesNoResponseDialogWithTitleStringInBX
169	jnz SHORT .NothingToSave
170	jmp BiosFile_SaveUnsavedChanges
171	ALIGN JUMP_ALIGN
172	.NothingToSave:
173	ret
174
175
176	;--------------------------------------------------------------------
177	; Buffers_AppendZeroesIfNeeded
178	; Parameters:
179	; Nothing
180	; Returns:
181	; Nothing
182	; Corrupts registers:
183	; AX, CX, DI
184	;--------------------------------------------------------------------
185	ALIGN JUMP_ALIGN
186	Buffers_AppendZeroesIfNeeded:
187	push es
188
189	eMOVZX di, [cs:g_cfgVars+CFGVARS.bEepromType]
190	mov cx, [cs:di+g_rgwEepromTypeToSizeInWords]
191	sub cx, [cs:g_cfgVars+CFGVARS.wImageSizeInWords] ; CX = WORDs to append
192	jbe SHORT .NoNeedToAppendZeroes
193
194	call Buffers_GetFileBufferToESDI
195	mov ax, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]
196	eSHL_IM ax, 1
197	add di, ax ; ES:DI now point first unused image byte
198	xor ax, ax
199	%ifdef CLD_NEEDED
200	cld
201	%endif
202	rep stosw
203	ALIGN JUMP_ALIGN
204	.NoNeedToAppendZeroes:
205	pop es
206	ret
207
208
209	;--------------------------------------------------------------------
210	; Buffers_GenerateChecksum
211	; Parameters:
212	; Nothing
213	; Returns:
214	; Nothing
215	; Corrupts registers:
216	; AX, BX, CX, DI
217	;--------------------------------------------------------------------
218	ALIGN JUMP_ALIGN
219	Buffers_GenerateChecksum:
220	push es
221	push dx
222
223	call Buffers_GetFileBufferToESDI
224	call EEPROM_GetXtideUniversalBiosSizeFromESDItoDXCX
225	%ifdef CLD_NEEDED
226	cld
227	%endif
228
229	; Compatibility fix for 3Com 3C503 cards where the ASIC returns 8080h as the last two bytes of the ROM.
230
231	; Assume the BIOS size is not 8K, ie generate a normal checksum.
232	dec cx
233	mov ax, 100h
234	cmp cx, 8192 - 1
235	jne SHORT .BiosSizeIsNot8K
236	; The BIOS size is 8K and therefore a potential candidate for a 3Com 3C503 card.
237	mov cl, (8192 - 3) & 0FFh
238	mov ah, 3
239	ALIGN JUMP_ALIGN
240	.BiosSizeIsNot8K:
241	.SumNextByte:
242	add al, [es:di]
243	inc di
244	loop .SumNextByte
245	.NextChecksumByte:
246	neg al
247	stosb
248	dec ah
249	jnz SHORT .NextChecksumByte
250
251	pop dx
252	pop es
253	ret
254
255
256	;--------------------------------------------------------------------
257	; Buffers_GetRomvarsFlagsToAX
258	; Parameters:
259	; Nothing
260	; Returns:
261	; AX: ROMVARS.wFlags
262	; Corrupts registers:
263	; BX
264	;--------------------------------------------------------------------
265	ALIGN JUMP_ALIGN
266	Buffers_GetRomvarsFlagsToAX:
267	mov bx, ROMVARS.wFlags
268	; Fall to Buffers_GetRomvarsValueToAXfromOffsetInBX
269
270	;--------------------------------------------------------------------
271	; Buffers_GetRomvarsValueToAXfromOffsetInBX
272	; Parameters:
273	; BX: ROMVARS offset
274	; Returns:
275	; AX: Value
276	; Corrupts registers:
277	; Nothing
278	;--------------------------------------------------------------------
279	ALIGN JUMP_ALIGN
280	Buffers_GetRomvarsValueToAXfromOffsetInBX:
281	push es
282	push di
283	call Buffers_GetFileBufferToESDI
284	mov ax, [es:bx+di]
285	pop di
286	pop es
287	ret
288
289
290	;--------------------------------------------------------------------
291	; Buffers_GetIdeControllerCountToCX
292	; Parameters:
293	; SS:BP: Menu handle
294	; Returns:
295	; CX: Number of IDE controllers to configure
296	; ES:DI: Ptr to file buffer
297	; Corrupts registers:
298	; Nothing
299	;--------------------------------------------------------------------
300	ALIGN JUMP_ALIGN
301	Buffers_GetIdeControllerCountToCX:
302	xor cx, cx
303	call Buffers_GetFileBufferToESDI
304	or cl, [es:di+ROMVARS.bIdeCnt]
305	jnz SHORT .LimitControllerCountForLiteMode
306	inc cx ; Make sure there is at least one controller
307
308	.LimitControllerCountForLiteMode:
309	test BYTE [es:di+ROMVARS.wFlags], FLG_ROMVARS_FULLMODE
310	jnz SHORT .ReturnControllerCountInCX
311	MIN_U cl, MAX_LITE_MODE_CONTROLLERS
312
313	.ReturnControllerCountInCX:
314	ret
315
316
317	;--------------------------------------------------------------------
318	; Buffers_GetFlashComparisonBufferToESDI
319	; Buffers_GetFileDialogItemBufferToESDI
320	; Buffers_GetFileBufferToESDI
321	; Parameters:
322	; Nothing
323	; Returns:
324	; ES:DI: Ptr to file buffer
325	; Corrupts registers:
326	; Nothing
327	;--------------------------------------------------------------------
328	ALIGN JUMP_ALIGN
329	Buffers_GetFlashComparisonBufferToESDI:
330	Buffers_GetFileDialogItemBufferToESDI:
331	call Buffers_GetFileBufferToESDI
332	mov di, es
333	SKIP2B f
334	Buffers_GetFileBufferToESDI:
335	mov di, cs
336	add di, 1000h ; Change to next 64k page
337	mov es, di
338	xor di, di ; Ptr now in ES:DI
339	ret

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source: xtideuniversalbios/trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm@ 616

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