Немига 405 boot 02A-MD
Загрузка на Немиге 4.05
В дисководе MD0: вставлена дискета 02A-MD.DSK.
Filename Blocks Date Start Bytes ---------- ------ --------- ----- -------- < UNUSED > 4 12 2048 RT11SJ.SYS 55 15-Feb-91 16 28160 SWAP .SYS 0 13-May-92 71 0 LP .SYS 2 31-May-89 71 1024 LPU .SYS 0 13-Jan-93 73 0 LN .SYS 2 20-Oct-92 73 1024 LB .SYS 2 13-Jan-93 75 1024 VD .SYS 2 29-Mar-93 77 1024 VMU .SYS 0 17-Dec-91 79 0 VM .SYS 2 18-May-92 79 1024 LD .SYS 8 15-Aug-90 81 4096 SG .SAV 8 02-Mar-93 89 4096 SL .SAV 8 22-Jul-91 97 4096 STARTS.SAV 1 22-Mar-93 105 512 ON .SAV 1 20-May-92 106 512 DATE .SAV 1 15-Aug-90 107 512 NET .SAV 14 21-Jun-91 108 7168 DIR .SAV 4 10-Aug-91 122 2048 RESORC.SAV 22 17-May-88 126 11264 NC .SAV 25 06-Apr-93 148 12800 EDIK .SAV 22 24-Feb-93 173 11264 DESS .SAV 18 13-Feb-92 195 9216 SC .SYS 3 13-Jan-93 213 1536 MX .SYS 3 20-Jan-92 216 1536 BINCOM.SAV 10 21-Sep-88 219 5120 SRCCOM.SAV 11 21-Sep-88 229 5632 V0 .SYS 3 06-May-92 240 1536 V1 .SYS 2 05-May-92 243 1024 G8 .SYS 8 22-Feb-93 245 4096 MF .SAV 3 27-May-92 253 1536 SOS .SAV 4 29-Apr-87 256 2048 NETRW .SAV 2 29-May-92 260 1024 TRANS .SAV 3 08-Jun-92 262 1536 DUP .SAV 43 14-Dec-90 265 22016 PIP .SAV 28 14-Dec-90 308 14336 TXT .SAV 3 09-Mar-93 336 1536 VD .COM 1 16-Apr-93 339 512 VD .DIR 1 16-Apr-93 340 512 MD .SYS 11 12-Mar-91 341 5632 < UNUSED > 107 352 54784 ---------- ------ --------- ----- -------- 38 files, 336 blocks
Запускаем машину, она загружается в Пульт, пользователь вводит команду D.
Загрузчик в ПЗУ
161654 -- Команда 'D' -- загрузка с диска 163026 -- Мы на 0-й дорожке, читаем первый сектор: в первом секторе записано количество секторов в каждой дорожке Floppy0 READ 17 POS0010 SC00 TR00 163050 -- Получаем количество секторов на 0-й дорожке (это 23.) читаем весь остаток 0-й дорожки Floppy0 READ a0 POS0140 SC01 TR00 Floppy0 READ 3e POS0270 SC02 TR00 Floppy0 READ 83 POS0400 SC03 TR00 Floppy0 READ fe POS0530 SC04 TR00 Floppy0 READ 00 POS0660 SC05 TR00 Floppy0 READ ff POS0790 SC06 TR00 Floppy0 READ ff POS0920 SC07 TR00 Floppy0 READ ff POS1050 SC08 TR00 Floppy0 READ 1f POS1180 SC09 TR00 Floppy0 READ 19 POS1310 SC10 TR00 Floppy0 READ 00 POS1440 SC11 TR00 Floppy0 READ 59 POS1570 SC12 TR00 Floppy0 READ 42 POS1700 SC13 TR00 Floppy0 READ 45 POS1830 SC14 TR00 Floppy0 READ 81 POS1960 SC15 TR00 Floppy0 READ f4 POS2090 SC16 TR00 Floppy0 READ f4 POS2220 SC17 TR00 Floppy0 READ b6 POS2350 SC18 TR00 Floppy0 READ 4a POS2480 SC19 TR00 Floppy0 READ 01 POS2610 SC20 TR00 Floppy0 READ 04 POS2740 SC21 TR00 Floppy0 READ 32 POS2870 SC22 TR00 выходим из подпрограммы чтения 161670: MOV #000200, @#177766 161676: CLR PC ; Запуск полученного блока с адреса 000000
Начальный загрузчик MD BOOT
000000: NOP 000002: BR 000024 Очищается экран и выводится надпись "MD BOOT V02.02(#)" Floppy0 COMMAND 000070 Floppy0 SET STATE 1 OPER 000060 Floppy0 STEP IN Floppy0 PREPARE TRACK 1 Floppy0 COMMAND 000030 Floppy0 SET STATE 1 OPER 000020 Floppy0 STEP OUT Floppy0 PREPARE TRACK 0 Floppy TRACK 00 Floppy0 COMMAND 000010 Floppy0 SET STATE 1 OPER 000000 Floppy0 READ 17 POS0010 SC00 TR00 Floppy0 SET STATE 0 OPER 000000 Floppy0 COMMAND 000010 Floppy0 SET STATE 1 OPER 000000 Чтение 0-й дорожки: Floppy0 READ 17 POS0010 SC00 TR00 Floppy0 READ a0 POS0140 SC01 TR00 Floppy0 READ 3e POS0270 SC02 TR00 Floppy0 READ 83 POS0400 SC03 TR00 Floppy0 READ fe POS0530 SC04 TR00 Floppy0 READ 00 POS0660 SC05 TR00 Floppy0 READ ff POS0790 SC06 TR00 Floppy0 READ ff POS0920 SC07 TR00 Floppy0 READ ff POS1050 SC08 TR00 Floppy0 READ 1f POS1180 SC09 TR00 Floppy0 READ 19 POS1310 SC10 TR00 Floppy0 READ 00 POS1440 SC11 TR00 Floppy0 READ 59 POS1570 SC12 TR00 Floppy0 READ 42 POS1700 SC13 TR00 Floppy0 READ 45 POS1830 SC14 TR00 Floppy0 READ 81 POS1960 SC15 TR00 Floppy0 READ f4 POS2090 SC16 TR00 Floppy0 READ f4 POS2220 SC17 TR00 Floppy0 READ b6 POS2350 SC18 TR00 Floppy0 READ 4a POS2480 SC19 TR00 Floppy0 READ 01 POS2610 SC20 TR00 Floppy0 READ 04 POS2740 SC21 TR00 Floppy0 READ 32 POS2870 SC22 TR00 Floppy0 SET STATE 0 OPER 000000 Floppy0 COMMAND 000070 Floppy0 SET STATE 1 OPER 000060 Floppy0 STEP IN Floppy0 PREPARE TRACK 1 Floppy0 COMMAND 000010 Floppy0 SET STATE 1 OPER 000000 Чтение 1-й дорожки: Floppy0 READ 6c POS0010 SC00 TR01 Floppy0 READ 0d POS0140 SC01 TR01 Floppy0 READ 03 POS0270 SC02 TR01 Floppy0 READ bb POS0400 SC03 TR01 Floppy0 READ 04 POS0530 SC04 TR01 Floppy0 READ 00 POS0660 SC05 TR01 Floppy0 READ 35 POS0790 SC06 TR01 Floppy0 READ ff POS0920 SC07 TR01 Floppy0 READ ff POS1050 SC08 TR01 Floppy0 READ ff POS1180 SC09 TR01 Floppy0 READ 00 POS1310 SC10 TR01 Floppy0 READ 00 POS1440 SC11 TR01 Floppy0 READ 00 POS1570 SC12 TR01 Floppy0 READ 00 POS1700 SC13 TR01 Floppy0 READ 00 POS1830 SC14 TR01 Floppy0 READ 00 POS1960 SC15 TR01 Floppy0 READ 00 POS2090 SC16 TR01 Floppy0 READ 00 POS2220 SC17 TR01 Floppy0 READ 00 POS2350 SC18 TR01 Floppy0 READ 00 POS2480 SC19 TR01 Floppy0 READ 00 POS2610 SC20 TR01 Floppy0 READ 00 POS2740 SC21 TR01 Floppy0 READ 00 POS2870 SC22 TR01 Затем идём и читаем дорожки 59, 60, 61.