; Disassembly of the file "Z:\home\knoppix\CoBra Project\Software\CPM\CPM CHRIS_MDSP analysis\Boot_Sector.bin"
; 
; CPU Type: Z80
; 
; Using the opcode map file "Z:\home\knoppix\CoBra Project\Software\CPM\CPM CHRIS_MDSP analysis\Boot_Sector.bin.opmap"
; ; Created with dZ80 2.0
; 
; on Tuesday, 31 of January 2017 at 01:04 AM
; 
0000 C38000	JP	$0080

0003 80		DEFB	$80
0004 00		DEFB	$00
0005 00		DEFB	$00
0006 00		DEFB	$00
0007 00		DEFB	$00
0008 00		DEFB	$00
0009 00		DEFB	$00
000A 00		DEFB	$00
000B 00		DEFB	$00
000C 00		DEFB	$00
000D 00		DEFB	$00
000E 00		DEFB	$00
000F 00		DEFB	$00
0010 00		DEFB	$00
0011 00		DEFB	$00
0012 00		DEFB	$00
0013 00		DEFB	$00
0014 00		DEFB	$00
0015 00		DEFB	$00
0016 00		DEFB	$00
0017 00		DEFB	$00
0018 00		DEFB	$00
0019 00		DEFB	$00
001A 00		DEFB	$00
001B 00		DEFB	$00
001C 00		DEFB	$00
001D 00		DEFB	$00
001E 00		DEFB	$00
001F 00		DEFB	$00
0020 00		DEFB	$00
0021 00		DEFB	$00
0022 00		DEFB	$00
0023 00		DEFB	$00
0024 00		DEFB	$00
0025 00		DEFB	$00
0026 00		DEFB	$00
0027 00		DEFB	$00
0028 00		DEFB	$00
0029 00		DEFB	$00
002A 00		DEFB	$00
002B 00		DEFB	$00
002C 00		DEFB	$00
002D 00		DEFB	$00
002E 00		DEFB	$00
002F 00		DEFB	$00
0030 00		DEFB	$00
0031 00		DEFB	$00
0032 00		DEFB	$00
0033 00		DEFB	$00
0034 00		DEFB	$00
0035 00		DEFB	$00
0036 00		DEFB	$00
0037 00		DEFB	$00
0038 00		DEFB	$00
0039 00		DEFB	$00
003A 00		DEFB	$00
003B 00		DEFB	$00
003C 00		DEFB	$00
003D 00		DEFB	$00
003E 00		DEFB	$00
003F 00		DEFB	$00
0040 00		DEFB	$00
0041 00		DEFB	$00
0042 00		DEFB	$00
0043 00		DEFB	$00
0044 00		DEFB	$00
0045 00		DEFB	$00
0046 00		DEFB	$00
0047 00		DEFB	$00
0048 00		DEFB	$00
0049 00		DEFB	$00
004A 00		DEFB	$00
004B 00		DEFB	$00
004C 00		DEFB	$00
004D 00		DEFB	$00
004E 00		DEFB	$00
004F 00		DEFB	$00
0050 00		DEFB	$00
0051 00		DEFB	$00
0052 00		DEFB	$00
0053 00		DEFB	$00
0054 00		DEFB	$00
0055 00		DEFB	$00
0056 00		DEFB	$00
0057 00		DEFB	$00
0058 00		DEFB	$00
0059 00		DEFB	$00
005A 00		DEFB	$00
005B 00		DEFB	$00
005C 00		DEFB	$00
005D 00		DEFB	$00
005E 00		DEFB	$00
005F 00		DEFB	$00
0060 00		DEFB	$00
0061 00		DEFB	$00
0062 00		DEFB	$00
0063 00		DEFB	$00
0064 00		DEFB	$00
0065 00		DEFB	$00
0066 00		DEFB	$00
0067 00		DEFB	$00
0068 00		DEFB	$00
0069 00		DEFB	$00
006A 00		DEFB	$00
006B 00		DEFB	$00
006C 00		DEFB	$00
006D 00		DEFB	$00
006E 00		DEFB	$00
006F 00		DEFB	$00
0070 00		DEFB	$00
0071 00		DEFB	$00
0072 00		DEFB	$00
0073 00		DEFB	$00
0074 00		DEFB	$00
0075 00		DEFB	$00
0076 00		DEFB	$00
0077 00		DEFB	$00
0078 00		DEFB	$00
0079 00		DEFB	$00
007A 00		DEFB	$00
007B 00		DEFB	$00
007C 00		DEFB	$00
007D 00		DEFB	$00
007E 00		DEFB	$00
007F 00		DEFB	$00

0080 F3		DI
0081 210001	LD	HL,$0100
0084 F9		LD	SP,HL		; set stack at $0100
0085 3E92	LD	A,$92		; control word for 8255: Mode Set flag=active,
;					; 			Group A: Select Mode 0,
;					;				 Port A set to Input mode,
;					;				 Port C (upper half) set to Output Mode,
;					;			Group B: Select Mode 0,
;					;				 Port B set to Input Mode,
;					;				 Port C (lower half) set to Output Mode
0087 D3DF	OUT	($DF),A		; write control word to 8255
0089 D3DF	OUT	($DF),A		; write control word to 8255 (again !?)
008B 3E41	LD	A,$41
008D D3FE	OUT	($FE),A		; set 06 to "1" for VRAM access, border to blue
008F 110062	LD	DE,$6200
0092 01001E	LD	BC,$1E00
0095 EDB0	LDIR			; copy $0100-$1EFF to $6200-7FFF			BLOCK#1 ($6200-77FF) + CCP ($7800-$7FFF)
					; when done, HL=$1F00					##### CCP WILL BE COPIED TO $E000-$E7FF BY BIOS CTC INT. ROUTINE #2 #####
0097 1100E8	LD	DE,$E800
009A 010018	LD	BC,$1800
009D EDB0	LDIR			; copy $1F00-$36FF to $E800-$FFFF			(BDOS+BIOS)
					; when done, HL=$3700
009F CBB7	RES	6,A		; A=$01
00A1 D3FE	OUT	($FE),A		; set 06 to "0" for DRAM access
00A3 210037	LD	HL,$3700
00A6 110001	LD	DE,$0100
00A9 010009	LD	BC,$0900
00AC EDB0	LDIR			; copy $3700-$3FFF to $0100-$09FF			(CHRIS DEMO)
00AE 21FF0A	LD	HL,$0AFF
00B1 11000B	LD	DE,$0B00
00B4 0106DD	LD	BC,$DD06
00B7 EDB0	LDIR			; fill $0B00-$E805 with ($0AFF)=$1A
00B9 C300F6	JP	$F600		; jump to start of BIOS (BIOS function #0, BOOT)

00BC 00		DEFB	$00
00BD 00		DEFB	$00
00BE 00		DEFB	$00
00BF 00		DEFB	$00
00C0 00		DEFB	$00
00C1 00		DEFB	$00
00C2 00		DEFB	$00
00C3 00		DEFB	$00
00C4 00		DEFB	$00
00C5 00		DEFB	$00
00C6 00		DEFB	$00
00C7 00		DEFB	$00
00C8 00		DEFB	$00
00C9 00		DEFB	$00
00CA 00		DEFB	$00
00CB 00		DEFB	$00
00CC 00		DEFB	$00
00CD 00		DEFB	$00
00CE 00		DEFB	$00
00CF 00		DEFB	$00
00D0 00		DEFB	$00
00D1 00		DEFB	$00
00D2 00		DEFB	$00
00D3 00		DEFB	$00
00D4 00		DEFB	$00
00D5 00		DEFB	$00
00D6 00		DEFB	$00
00D7 00		DEFB	$00
00D8 00		DEFB	$00
00D9 00		DEFB	$00
00DA 00		DEFB	$00
00DB 00		DEFB	$00
00DC 00		DEFB	$00
00DD 00		DEFB	$00
00DE 00		DEFB	$00
00DF 00		DEFB	$00
00E0 00		DEFB	$00
00E1 00		DEFB	$00
00E2 00		DEFB	$00
00E3 00		DEFB	$00
00E4 00		DEFB	$00
00E5 00		DEFB	$00
00E6 00		DEFB	$00
00E7 00		DEFB	$00
00E8 00		DEFB	$00
00E9 00		DEFB	$00
00EA 00		DEFB	$00
00EB 00		DEFB	$00
00EC 00		DEFB	$00
00ED 00		DEFB	$00
00EE 00		DEFB	$00
00EF 00		DEFB	$00
00F0 00		DEFB	$00
00F1 00		DEFB	$00
00F2 00		DEFB	$00
00F3 00		DEFB	$00
00F4 00		DEFB	$00
00F5 00		DEFB	$00
00F6 00		DEFB	$00
00F7 00		DEFB	$00
00F8 00		DEFB	$00
00F9 00		DEFB	$00
00FA 00		DEFB	$00
00FB 00		DEFB	$00
00FC 00		DEFB	$00
00FD 00		DEFB	$00
00FE 00		DEFB	$00
00FF 00		DEFB	$00
0100 00		DEFB	$00
0101 00		DEFB	$00
0102 00		DEFB	$00
0103 00		DEFB	$00
0104 00		DEFB	$00
0105 00		DEFB	$00
0106 00		DEFB	$00
0107 00		DEFB	$00
0108 00		DEFB	$00
0109 00		DEFB	$00
010A 00		DEFB	$00
010B 00		DEFB	$00
010C 00		DEFB	$00
010D 00		DEFB	$00
010E 00		DEFB	$00
010F 00		DEFB	$00
0110 00		DEFB	$00
0111 00		DEFB	$00
0112 00		DEFB	$00
0113 00		DEFB	$00
0114 00		DEFB	$00
0115 00		DEFB	$00
0116 00		DEFB	$00
0117 00		DEFB	$00
0118 00		DEFB	$00
0119 00		DEFB	$00
011A 00		DEFB	$00
011B 00		DEFB	$00
011C 00		DEFB	$00
011D 00		DEFB	$00
011E 00		DEFB	$00
011F 00		DEFB	$00
0120 00		DEFB	$00
0121 00		DEFB	$00
0122 00		DEFB	$00
0123 00		DEFB	$00
0124 00		DEFB	$00
0125 00		DEFB	$00
0126 00		DEFB	$00
0127 00		DEFB	$00
0128 00		DEFB	$00
0129 00		DEFB	$00
012A 00		DEFB	$00
012B 00		DEFB	$00
012C 00		DEFB	$00
012D 00		DEFB	$00
012E 00		DEFB	$00
012F 00		DEFB	$00
0130 00		DEFB	$00
0131 00		DEFB	$00
0132 00		DEFB	$00
0133 00		DEFB	$00
0134 00		DEFB	$00
0135 00		DEFB	$00
0136 00		DEFB	$00
0137 00		DEFB	$00
0138 00		DEFB	$00
0139 00		DEFB	$00
013A 00		DEFB	$00
013B 00		DEFB	$00
013C 00		DEFB	$00
013D 00		DEFB	$00
013E 00		DEFB	$00
013F 00		DEFB	$00
0140 00		DEFB	$00
0141 00		DEFB	$00
0142 00		DEFB	$00
0143 00		DEFB	$00
0144 00		DEFB	$00
0145 00		DEFB	$00
0146 00		DEFB	$00
0147 00		DEFB	$00
0148 00		DEFB	$00
0149 00		DEFB	$00
014A 00		DEFB	$00
014B 00		DEFB	$00
014C 00		DEFB	$00
014D 00		DEFB	$00
014E 00		DEFB	$00
014F 00		DEFB	$00
0150 00		DEFB	$00
0151 00		DEFB	$00
0152 00		DEFB	$00
0153 00		DEFB	$00
0154 00		DEFB	$00
0155 00		DEFB	$00
0156 00		DEFB	$00
0157 00		DEFB	$00
0158 00		DEFB	$00
0159 00		DEFB	$00
015A 00		DEFB	$00
015B 00		DEFB	$00
015C 00		DEFB	$00
015D 00		DEFB	$00
015E 00		DEFB	$00
015F 00		DEFB	$00
0160 00		DEFB	$00
0161 00		DEFB	$00
0162 00		DEFB	$00
0163 00		DEFB	$00
0164 00		DEFB	$00
0165 00		DEFB	$00
0166 00		DEFB	$00
0167 00		DEFB	$00
0168 00		DEFB	$00
0169 00		DEFB	$00
016A 00		DEFB	$00
016B 00		DEFB	$00
016C 00		DEFB	$00
016D 00		DEFB	$00
016E 00		DEFB	$00
016F 00		DEFB	$00
0170 00		DEFB	$00
0171 00		DEFB	$00
0172 00		DEFB	$00
0173 00		DEFB	$00
0174 00		DEFB	$00
0175 00		DEFB	$00
0176 00		DEFB	$00
0177 00		DEFB	$00
0178 00		DEFB	$00
0179 00		DEFB	$00
017A 00		DEFB	$00
017B 00		DEFB	$00
017C 00		DEFB	$00
017D 00		DEFB	$00
017E 00		DEFB	$00
017F 00		DEFB	$00

0180 01FE00	LD	BC,$00FE
0183 ED78	IN	A,(C)
0185 E63F	AND	$3F
0187 FE3F	CP	$3F
0189 20F5	JR	NZ,$0180
018B C373F8	JP	$F873
018E 2147F6	LD	HL,$F647
0191 3E04	LD	A,$04
0193 AE		XOR	(HL)
0194 77		LD	(HL),A
0195 E604	AND	$04
0197 210801	LD	HL,$0108
019A 2803	JR	Z,$019F
019C 210204	LD	HL,$0402
019F 2248F6	LD	($F648),HL
01A2 3A40F6	LD	A,($F640)
01A5 C364F9	JP	$F964
01A8 3AC068	LD	A,($68C0)
01AB EE18	XOR	$18
01AD 32C068	LD	($68C0),A
01B0 18F0	JR	$01A2
01B2 3A4EF6	LD	A,($F64E)
01B5 FE82	CP	$82
01B7 CA8E62	JP	Z,$628E
01BA FEDE	CP	$DE
01BC 28EA	JR	Z,$01A8
01BE FEE0	CP	$E0
01C0 CC1176	CALL	Z,$7611
01C3 18DD	JR	$01A2
01C5 3A40F6	LD	A,($F640)
01C8 325F78	LD	($785F),A
01CB CBF7	SET	6,A
01CD 3240F6	LD	($F640),A
01D0 FB		EI	
01D1 D9		EXX	
01D2 08		EX	AF,AF'
01D3 FE0B	CP	$0B
01D5 181C	JR	$01F3
01D7 ED735878	LD	($7858),SP
01DB 315878	LD	SP,$7858
01DE 216078	LD	HL,$7860
01E1 87		ADD	A,A
01E2 5F		LD	E,A
01E3 1600	LD	D,$00
01E5 19		ADD	HL,DE
01E6 5E		LD	E,(HL)
01E7 23		INC	HL
01E8 56		LD	D,(HL)
01E9 D5		PUSH	DE
01EA D9		EXX	
01EB E1		POP	HL
01EC CD9C67	CALL	$679C
01EF ED7B5878	LD	SP,($7858)
01F3 D9		EXX	
01F4 F3		DI	
01F5 3A5F78	LD	A,($785F)
01F8 3240F6	LD	($F640),A
01FB 18A5	JR	$01A2

01FD 00		DEFB	$00
01FE 00		DEFB	$00
01FF 00		DEFB	$00