rev |
line source |
pascal@19515
|
1 ;***************************************************************
|
pascal@19515
|
2 ;****** This file is distributed under GPL
|
pascal@19515
|
3 ;***************************************************************
|
pascal@19515
|
4 ideal
|
pascal@21984
|
5 %PAGESIZE 1000
|
pascal@19515
|
6 %crefref
|
pascal@19515
|
7 %noincl
|
pascal@19515
|
8 %nomacs
|
pascal@19636
|
9 p8086
|
pascal@19515
|
10
|
pascal@19515
|
11 group DGROUP _TEXT,_DATA,_BSS
|
pascal@19515
|
12 assume cs:DGROUP,ds:DGROUP
|
pascal@19515
|
13
|
pascal@19515
|
14 segment _TEXT byte public use16 'CODE'
|
pascal@20451
|
15 ends _TEXT
|
pascal@20451
|
16
|
pascal@20451
|
17 segment _DATA byte public use16 'DATA'
|
pascal@20451
|
18 global _data_start:byte
|
pascal@20451
|
19 label _data_start byte
|
pascal@20451
|
20 ifndef NO386
|
pascal@22007
|
21 msg_badcpu db "I need 386+ CPU in real mode or under VCPI manager",0
|
pascal@20451
|
22 endif
|
pascal@20451
|
23 global _vcpi:byte
|
pascal@22007
|
24 msg_badmapping db "VCPI: low 640k need 1:1 mapping"
|
pascal@20451
|
25 _vcpi db 0
|
pascal@20451
|
26
|
pascal@20451
|
27 ends _DATA
|
pascal@20451
|
28
|
pascal@20451
|
29 segment _BSS byte public use16 'BSS'
|
pascal@21757
|
30
|
pascal@21757
|
31 STACK_SIZE = 1024
|
pascal@21757
|
32
|
pascal@20451
|
33 global _bss_start:byte
|
pascal@20451
|
34 label _bss_start byte
|
pascal@22170
|
35 global _version_string:byte
|
pascal@22170
|
36 label _version_string byte
|
pascal@21757
|
37 db STACK_SIZE-2 dup(?)
|
pascal@21757
|
38 stktop dw ?
|
pascal@20451
|
39 global _cpu_features:dword
|
pascal@20451
|
40 _cpu_features dd ?
|
pascal@20451
|
41 ends _BSS
|
pascal@20451
|
42
|
pascal@20451
|
43 segment _TEXT byte public use16 'CODE'
|
pascal@19515
|
44
|
pascal@19825
|
45 macro cpuid
|
pascal@19825
|
46 db 0fh,0A2h
|
pascal@19825
|
47 endm
|
pascal@19825
|
48
|
pascal@19515
|
49 org 100h
|
pascal@19515
|
50 global _text_start:byte
|
pascal@19515
|
51 label _text_start byte
|
pascal@19546
|
52
|
pascal@19515
|
53 ;***************************************************************
|
pascal@19515
|
54 ; clear bss
|
pascal@19515
|
55 ;***************************************************************
|
pascal@21757
|
56 mov sp,offset stktop
|
pascal@22179
|
57 mov si,offset _bss_start
|
pascal@20457
|
58 mov bx, 0F000h ; cld ; cli & empty string
|
pascal@19515
|
59 clearbss:
|
pascal@20451
|
60 mov [si],bl ; clear bss + heap + sp
|
pascal@20426
|
61 inc si
|
pascal@19546
|
62 jne clearbss
|
pascal@19546
|
63
|
pascal@19546
|
64 ;***************************************************************
|
pascal@19546
|
65 ; check CPU
|
pascal@19546
|
66 ;***************************************************************
|
pascal@19546
|
67
|
pascal@19546
|
68 ; Check for oldies
|
pascal@19873
|
69 push bx ; < 286 : flags[12..15] are forced 1
|
pascal@19873
|
70 popf ; = 286 : flags[12..15] are forced 0
|
pascal@19873
|
71 pushf ; > 286 : only flags[15] is forced 0
|
pascal@19873
|
72 pop dx
|
pascal@20451
|
73 add dh,bh ; NS=386+, S+NC=286, S+C=86/186
|
pascal@20451
|
74 ifndef NO386
|
pascal@19873
|
75 mov bx,offset msg_badcpu
|
pascal@20457
|
76 js godie ;it is not a 386+
|
pascal@20451
|
77 else
|
pascal@20457
|
78 js endcpu86 ;it is not a 386+
|
pascal@19546
|
79 endif
|
pascal@19636
|
80 p386
|
pascal@19546
|
81 ; Check for vm
|
pascal@19546
|
82 smsw ax ;SMSW cannot be trapped! :-)
|
pascal@19571
|
83 and al,1 ;MSW_PE
|
pascal@19546
|
84 ; We're in vm
|
pascal@20457
|
85 jnz check_vcpi
|
pascal@20457
|
86
|
pascal@20457
|
87 check_rm_paging:
|
pascal@20457
|
88 ; It's a 386 in real mode, chk for paging (crazy but possible)
|
pascal@20457
|
89 mov eax,cr0
|
pascal@20457
|
90 inc eax ;CR0_PG to S
|
pascal@20457
|
91 jns endcpu386
|
pascal@20457
|
92 no_vcpi:
|
pascal@20457
|
93 p8086
|
pascal@20457
|
94 extrn die:near
|
pascal@20457
|
95 godie:
|
pascal@20457
|
96 call near die
|
pascal@19546
|
97
|
pascal@19546
|
98 ;***************************************************************
|
pascal@19546
|
99 ; checks for vcpi
|
pascal@19546
|
100 ;***************************************************************
|
pascal@19546
|
101 label check_vcpi near
|
pascal@20457
|
102 p386
|
pascal@19546
|
103 push ds
|
pascal@19546
|
104 ; Check whether it is safe to call 67h (we trust only known EMM managers)
|
pascal@20426
|
105 push si
|
pascal@19546
|
106 pop ds
|
pascal@19546
|
107 mov ds,[word 67h*4+2]
|
pascal@20426
|
108 cmp [dword si+10+4],'0XXX'
|
pascal@19546
|
109 jne skip
|
pascal@19825
|
110 ;mov eax,'XMME'
|
pascal@20426
|
111 ;xor eax,[dword si+10]
|
pascal@19546
|
112 ; QMME also works (as told by <J.S.Peatfield@damtp.cambridge.ac.uk>)
|
pascal@19825
|
113 ;shl eax,8
|
pascal@19825
|
114 mov ax,'ME'
|
pascal@20426
|
115 xor ax,[word si+10]
|
pascal@19546
|
116 skip:
|
pascal@19546
|
117 pop ds
|
pascal@19546
|
118 jne no_vcpi
|
pascal@19546
|
119
|
pascal@19546
|
120 ; Check emm manager status and version
|
pascal@19571
|
121 ;mov ah,40h ; get status
|
pascal@19571
|
122 ;int 67h
|
pascal@19571
|
123 ;test ah,ah
|
pascal@19571
|
124 ;jnz no_vcpi
|
pascal@19546
|
125 mov ah,46h ; get version
|
pascal@19546
|
126 int 67h
|
pascal@19546
|
127 test ah,ah
|
pascal@19546
|
128 jnz no_vcpi
|
pascal@19546
|
129 cmp al,40h ; version must be >= 4.0
|
pascal@19546
|
130 jb no_vcpi
|
pascal@19546
|
131 ; Check vcpi manager status
|
pascal@19546
|
132 ;;mov ax,5A01h ; ALLOCATE RAW PAGES
|
pascal@19546
|
133 ;;mov bx,4
|
pascal@19546
|
134 ;;int 67h
|
pascal@19546
|
135 ;;test ah,ah
|
pascal@19546
|
136 ;;jnz no_vcpi
|
pascal@19546
|
137 ;;push dx ;$ save handle
|
pascal@19546
|
138 mov ax,0DE00h ; check for vcpi present
|
pascal@19546
|
139 int 67h
|
pascal@19546
|
140 test ah,ah
|
pascal@19571
|
141 jnz no_vcpi
|
pascal@19546
|
142 is386vcpi:
|
pascal@19546
|
143 extrn prepare_vcpi:near
|
pascal@19546
|
144 call prepare_vcpi
|
pascal@19546
|
145 ; get_vcpi_interface() || die("VCPI: low 640k: need 1:1 mapping");
|
pascal@19546
|
146 ;extrn _get_vcpi_interface:near
|
pascal@19546
|
147 ;call _get_vcpi_interface
|
pascal@19546
|
148 mov bx,offset msg_badmapping
|
pascal@20457
|
149 jnz no_vcpi
|
pascal@21758
|
150 inc [byte bx+_vcpi-msg_badmapping]
|
pascal@20457
|
151 endcpu386:
|
pascal@20457
|
152 pushfd
|
pascal@20457
|
153 pop dx
|
pascal@20457
|
154 pop ax
|
pascal@20457
|
155 mov bl,al
|
pascal@20457
|
156 xor al,20h ; toggle CPUID feature bit 21
|
pascal@20457
|
157 push ax
|
pascal@20457
|
158 push dx
|
pascal@20457
|
159 popfd
|
pascal@20457
|
160 pushfd
|
pascal@20457
|
161 pop dx
|
pascal@20457
|
162 pop ax
|
pascal@20457
|
163 xor al,bl ; clear C
|
pascal@20457
|
164 je @@no_cpuid ; CPUID feature bit changed ?
|
pascal@20457
|
165 mov eax,80000001h ; Extended Processor Info and Feature Bits
|
pascal@20457
|
166 cpuid
|
pascal@20457
|
167 mov [_cpu_features],edx
|
pascal@20457
|
168 @@no_cpuid:
|
pascal@20457
|
169 endcpu86:
|
pascal@19636
|
170 p8086
|
pascal@19546
|
171
|
pascal@19515
|
172 ;***************************************************************
|
pascal@19515
|
173 ; build argv & argc
|
pascal@19515
|
174 ;***************************************************************
|
pascal@19546
|
175 extrn _heap_top:word
|
pascal@19546
|
176 mov di,[_heap_top]
|
pascal@19546
|
177 ;xor ax,ax
|
pascal@19546
|
178 ;push ax ; envp (already cleared)
|
pascal@19546
|
179 ;mov [word di],ax ; argv[0] = 0 (idem)
|
pascal@19515
|
180 mov si,80h
|
pascal@19515
|
181 lodsb
|
pascal@19515
|
182 cmp al,7Eh
|
pascal@19515
|
183 jbe alok
|
pascal@19515
|
184 mov al,7Eh
|
pascal@19515
|
185 alok:
|
pascal@19546
|
186 cbw
|
pascal@19515
|
187 xchg ax,bx
|
pascal@19515
|
188 mov [bx+si],bh ; set eos
|
pascal@19515
|
189 argbuild:
|
pascal@20160
|
190 ifdef DEBUG
|
pascal@20142
|
191 p386
|
pascal@20142
|
192 pusha
|
pascal@20142
|
193 mov bx,si
|
pascal@20142
|
194 extrn puts:near
|
pascal@20142
|
195 call puts
|
pascal@20142
|
196 popa
|
pascal@20160
|
197 endif
|
pascal@19515
|
198 mov bx,2 ; argc * 2
|
pascal@19515
|
199 argeos:
|
pascal@20451
|
200 mov cx,1 ; look for a start of string
|
pascal@19515
|
201 mov [byte si-1],bh ; mark eos
|
pascal@19515
|
202 mov ah,20h ; space will be eos
|
pascal@19515
|
203 arglp:
|
pascal@19515
|
204 lodsb
|
pascal@19515
|
205 cmp al,0h
|
pascal@19515
|
206 je argdone
|
pascal@19515
|
207 cmp al,20h
|
pascal@19515
|
208 jb argeos
|
pascal@19515
|
209 cmp al,ah
|
pascal@19515
|
210 je argeos
|
pascal@19515
|
211 cmp al,27h
|
pascal@19515
|
212 je isargstr
|
pascal@19515
|
213 cmp al,22h
|
pascal@19515
|
214 je isargstr
|
pascal@20451
|
215 jcxz arglp ; not start of string
|
pascal@19515
|
216 dec si
|
pascal@19884
|
217 ;jmp newarg
|
pascal@20451
|
218 db 0BAh ; mov dx,im opcode
|
pascal@19515
|
219 isargstr:
|
pascal@19515
|
220 mov ah,al ; expected eos
|
pascal@19515
|
221 newarg:
|
pascal@19515
|
222 mov [word bx+di],si ; argv[argc++] = si
|
pascal@19515
|
223 inc bx
|
pascal@19515
|
224 inc bx
|
pascal@20451
|
225 dec cx
|
pascal@19515
|
226 jmp arglp
|
pascal@19515
|
227 argdone:
|
pascal@19515
|
228 ;mov [word bx+di],0 ; argv[argc] = 0
|
pascal@19546
|
229 lea ax,[bx+di+2]
|
pascal@19546
|
230 mov [_heap_top],ax
|
pascal@19515
|
231 push di ; argv
|
pascal@19515
|
232 shr bx,1
|
pascal@19515
|
233 push bx ; argc
|
pascal@19515
|
234 ifndef filearg
|
pascal@19515
|
235 mov bx,[di+2] ; argv[1]
|
pascal@20528
|
236 extrn openargs:near
|
pascal@20528
|
237 call near openargs
|
pascal@19515
|
238 jc argend
|
pascal@19515
|
239 pop bx ; trash argc, argv >> 1Kb !
|
pascal@19546
|
240 global read_cmdline:near
|
pascal@20528
|
241 pop cx ; sizemax=argv
|
pascal@19546
|
242 read_cmdline:
|
pascal@20528
|
243 mov dx,di
|
pascal@20528
|
244 push dx
|
pascal@19515
|
245 push ax
|
pascal@20528
|
246 xchg ax,bx
|
pascal@20528
|
247 extrn @read$cxdxbx:near ; read(fd=bx,buffer=dx,size=cx)
|
pascal@20528
|
248 call near @read$cxdxbx
|
pascal@19515
|
249 pop bx ; fd for close
|
pascal@19515
|
250 pop si ; si=buffer=argv
|
pascal@19515
|
251 add di,ax
|
pascal@19515
|
252 extrn close:near
|
pascal@19515
|
253 call near close
|
pascal@19515
|
254 jmp argbuild
|
pascal@19515
|
255 argend:
|
pascal@19515
|
256 endif
|
pascal@19515
|
257
|
pascal@19515
|
258 ;***************************************************************
|
pascal@21757
|
259 extrn _main:near
|
pascal@21757
|
260 call _main
|
pascal@21757
|
261 ;never return
|
pascal@19538
|
262
|
pascal@19515
|
263 ;***************************************************************
|
pascal@21757
|
264
|
pascal@19515
|
265 ends _TEXT
|
pascal@19515
|
266
|
pascal@19515
|
267
|
pascal@19515
|
268 end _text_start
|
pascal@19515
|
269
|
pascal@19515
|
270 ;###### END OF FILE ############################################
|