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mini.asm
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;------------------------------
ENTRY EQU 5 ;entry point for the cp/m bdos.
TFCA EQU 5CH ;default file control block.
TFCB EQU TFCA+1
;------------------------------
ORG 100h
;
hallo: ; START
LD A,$00
LD B,$aa
SET 0,B
SET 7,A
;
LD IY,buf
LD (IY+2),$aa
BIT 3,(IY+2)
BIT 2,(IY+2)
NOP
;
LD IX,buf
LD (IX+2),$55
BIT 3,(IX+2)
BIT 2,(IX+2)
NOP
; BIT TEST
LD HL,buf
LD (HL),$55
BIT 3,(HL)
BIT 2,(HL)
NOP
;
LD A,$aa
BIT 2,A
BIT 3,A
BIT 0,A
LD B,A
BIT 1,B
; INC RR
LD IY,$aa55
INC IY
DEC IY
; --
NOP
; INC/ DEC
LD IY,buf
LD (IY+2),$55
INC (IY+2)
DEC (IY+2)
NOP
LD IX,buf
LD (IX+2),$55
INC (IX+2)
DEC (IX+2)
NOP
LD HL,buf
LD (HL),$aa
INC (HL)
DEC (HL)
NOP
LD B,$00
INC B
DEC B
DEC B
NOP
; CP
LD A,$70
LD B,$70
CP B ; compare A with B, shall have Z set
LD B,$91
CP B
CP $70
CP $90
;
LD IX,buf
LD (IX+2),$70
CP (IX+2)
LD (IX+2),$90
CP (IX+2)
;
LD IY,buf
LD (IY+4),$70
CP (IY+4)
LD (IY+4),$90
CP (IY+4)
;
LD HL,buf
LD (HL),$70
CP (HL)
LD (HL),$90
CP (HL)
; EX (SP),IY
LD SP,10 ; SP is 0x0a
LD BC,$1234
PUSH BC ; SP is 0x08 (0x09 is $12, 0x08 is $34)
POP DE ; SP shall be reset again to 0x0a
PUSH BC ; SP is 0x08
LD IY,$55aa
EX (SP),IY ; reads 0x08, 0x09, will end up 0x0a
NOP ; ASSERT H = $12, L = $34
EX (SP),IY
NOP ; ASSERT H = $55, L = $aa
; EX (SP),IX
LD SP,10 ; SP is 0x0a
LD BC,$1234
PUSH BC ; SP is 0x08 (0x09 is $12, 0x08 is $34)
POP DE ; SP shall be reset again to 0x0a
PUSH BC ; SP is 0x08
LD IX,$55aa
EX (SP),IX ; reads 0x08, 0x09, will end up 0x0a
NOP ; ASSERT H = $12, L = $34
EX (SP),IX
NOP ; ASSERT H = $55, L = $aa
; EX (SP),HL
LD SP,10 ; SP is 0x0a
LD BC,$1234
PUSH BC ; SP is 0x08 (0x09 is $12, 0x08 is $34)
POP DE ; SP shall be reset again to 0x0a
PUSH BC ; SP is 0x08
LD HL,$55aa
EX (SP),HL ; reads 0x08, 0x09, will end up 0x0a
NOP ; ASSERT H = $12, L = $34
EX (SP),HL
NOP ; ASSERT H = $55, L = $aa
; EXX
LD BC,$445a
LD DE,$3da2
LD HL,$8859
EXX
NOP ; ASSERT B = $00, C = $00, D = $00, E = $00, H = $00, L = $00
LD BC,$0988
LD DE,$9300
LD HL,$00e7
EXX
NOP ; ASSERT B = $44, C = $5a, D = $3d, E = $a2, H = $88, L = $59
EXX
NOP ; ASSERT B = $09, C = $88, D = $93, E = $00, H = $00, L = $e7
; EX AF,AF'
LD A,$55
SCF
EX AF,AF'
NOP ; ASSERT A = $00, CY clear
LD A,$aa
EX AF,AF'
NOP ; ASSERT A = $55, CY set
EX AF,AF'
NOP ; ASSERT A = $aa, CY clear
; EX DE.HL
LD DE,$1234
LD HL,$5678
EX DE,HL
NOP ; ASSERT D = $56, E = $78, H = $12, L = $34
; RRD
LD HL,buftmp
LD (HL),00100000b
LD A,10000100b
RRD
LD B,(HL) ; ASSERT B = $42
LD C,A ; ASSERT C = $80
; RLD
LD HL,buftmp
LD (HL),00110001b
LD A,01111010b
RLD
LD B,(HL) ; ASSERT B = $1a
LD C,A ; ASSERT C = $73
; SRL in multiple ways
OR A ; clear carry
LD A,10001111b
SRL A
LD B,A
NOP ; ASSERT B = $47, Cy set
OR A ; clear carry
LD A,10001111b
LD HL,buftmp ; not a constant one
LD (HL),A
SRL (HL)
LD C,(HL)
NOP ; ASSERT C = $47, Cy set
OR A ; clear carry
LD A,10001111b
LD IY,buftmp ; not a constant one
LD (IY+1),A
SRL (IY+1)
LD D,(IY+1)
NOP ; ASSERT D = $47, Cy set
; SRA in multiple ways
OR A ; clear carry
LD A,10111000b
SRA A
LD B,A
NOP ; ASSERT B = $dc, Cy cleared
OR A ; clear carry
LD A,10111000b
LD HL,buftmp ; not a constant one
LD (HL),A
SRA (HL)
LD C,(HL)
NOP ; ASSERT C = $dc, Cy cleared
OR A ; clear carry
LD A,10111000b
LD IY,buftmp ; not a constant one
LD (IY+1),A
SRA (IY+1)
LD D,(IY+1)
NOP ; ASSERT D = $dc, Cy cleared
; SLA in multiple ways
OR A ; clear carry
LD A,10110001b
SLA A
LD B,A
NOP ; ASSERT B = $62, Cy set
OR A ; clear carry
LD A,10110001b
LD HL,buftmp ; not a constant one
LD (HL),A
SLA (HL)
LD C,(HL)
NOP ; ASSERT C = $62, Cy set
OR A ; clear carry
LD A,10110001b
LD IY,buftmp ; not a constant one
LD (IY+1),A
SLA (IY+1)
LD D,(IY+1)
NOP ; ASSERT D = $62, Cy set
; RRC further
LD IY,buftmp ; not a constant one
LD A,00110001b
LD (IY+3),A
OR A ; clears carry?
RRC (IY+3) ; shall by CY, $98
LD C,(IY+3)
NOP
NOP
; RR further
LD HL,buftmp ; not a constant one
LD A,11011101b
LD (HL),A
OR A ; clears carry?
RR (HL) ; shall by CY, $6e
LD B,(HL)
NOP
NOP
; RL further
LD IY,buftmp ; not a constant one
LD A,10001111b
LD (IY+4),A
RL (IY+4) ; shall by CY, $1e
LD B,(IY+2)
NOP
NOP
LD B,10001000b
RL B ; shall be CY, %00010001 = $11
NOP
LD HL,buftmp ; not a constant one
LD A,11001100b
LD (HL),A
RL (HL) ; shall by CY, $99
LD A,(HL)
NOP
; RLC further
LD IY,buftmp ; not a constant one
LD A,11001100b
LD (IY+4),A
RLC (IY+4) ; shall by CY, $99
LD B,(IY+2)
NOP
NOP
LD B,10001000b
RLC B ; shall be CY, %00010001 = $11
NOP
LD HL,buftmp ; not a constant one
LD A,11001100b
LD (HL),A
RLC (HL) ; shall by CY, $99
LD A,(HL)
NOP
; RRA
LD A,11100001b
OR A
RRA ; shall be CY, %01110000 = $70
NOP
; RRCA
LD A,00010001b
RRCA ; shall be CY, %10001000 = $88
NOP
; RLA
LD A,01110110b
SCF
RLA ; shall be no CY, %11101101 = $ed
NOP
; RLCA
LD A,10000001b
RLCA ; shall be CY, %00000011 = $03
NOP
; XOR
LD A, $55
LD B, $aa
XOR B ; shall be $ff
XOR $01 ; shall be $fe, Signed
LD IX,buf7 ; is 43, 44, 45, 255
XOR (IX+3) ; $01
NOP
; AND
LD A, $ff
LD B, $aa
AND B ; shall be $aa
AND $22 ; shall be $22
LD HL,buf2 ; is 5
AND (HL) ; $00, Zero
NOP
; OR
LD A, $55
LD B, $aa
OR B ; shall be $ff
LD A, $11
OR $88 ; shall be $99
LD HL,buf2 ; is 5
OR (HL) ; $99+5 = $9d
SCF ; CY is 1
OR A ; still $9d, but CY is 0
NOP
; ADD
LD A,42
LD B,A
ADD A,B ; 84, kein Carry
LD C,230
ADD A,C ; 84 + 230 -> 58, Carry!
; SUB
LD A,58
LD D,55
SUB D ; shall be 3,
SUB 3 ; shall be 0, Sign
LD IX,buf ; buf = 1,2,3,4..
SUB (IX+0) ; A shall be $ff
LD IY,buf
SUB (IY+1) ; A shall be $fd
; SBC (with Carry)
LD A,59
LD D,55
SCF ; set CY
SBC A,D ; shall be 3,
SCF ; set CY
SBC A,3 ; shall be ff, Carry (Borrow!)
LD IX,buf ; buf = 1,2,3,4..
SBC A,(IX+0) ; A shall be $ff
LD IY,buf
SBC A,(IY+1) ; A shall be $fd
ADD A,42 ; shall be 42 again
LD HL,buf7
ADD A,(HL) ; 85
LD IX,buf7
ADD A,(IX+2) ; 85 + 45 = 130
NOP
LD IX,buf
LD C,(IX+1)
LD HL,buf2
LD (HL),C
LD D,(HL)
LD (IX+-2),D
LD (HL),$5a
LD (IX+-4),$a5
LD A,(BC)
LD A,11
LD A,(buf2+3)
LD A,$55
LD BC,buf
LD (BC),A
LD A,$77
LD DE,buf
LD (DE),A
LD A,$99
LD (buf),A
LD A,$32
LD I,A
LD A,$43
LD R,A
LD A,I ; A to be $32
LD A,R ; A to be $43
LD IX,buf
LD IY,$55aa
LD HL,(buf4) ; HL to be $200
LD BC,(buf) ; BC to be $0201
LD DE,(buf+1) ; DE to be $0302
LD SP,(buf+2) ; SP to be $0403
LD IX,(buf+3) ; SP to be $0504
LD IY,(buf+4) ; SP to be $0605
LD (buf6),HL
LD (buf+1),BC
LD (buf+2),DE
LD (buf+3),SP
LD (buf+4),IX
LD (buf+5),IY
LD SP,HL
LD SP,IX
LD SP,IY
LD SP,spend
PUSH BC
PUSH DE
PUSH HL
PUSH AF
PUSH IX
PUSH IY
POP BC
POP IX
NOP
INC HL
RL (HL)
LD A,TFCB
LD HL,1223H
LD BC, buf
JR hallo
JP hallo
TFCC EQU $
TFCD EQU $+20
hallo2:
LD A,(HL)
LD (BC),A
LD (5),A
LD A,(IX+5h)
LD (IY+12),A
LD BC,(buf)
LD HL,buf2
;
; Routine to convert (A) into upper case ascii. Only letters
; are affected.
;
UPPER: CP 'a' ;check for letters in the range of 'a' to 'z'.
RET C
CP '{'
RET NC
AND 5FH ;convert it if found.
RET
ORG $400
buf: DB 1,2,3,4,
buf2: DB 5,6,7,8,9,10
buf4: DEFW $200
buf6: DEFW $5aa5
DEFW $a55a
DEFW $1234
DEFW $4321
buf7: DB 43
DB 44
DB 45
DB 255
buf3: ; arithmetic test suite ... see http://benryves.com/bin/brass/manual.htm#labels
DEFW -1 ; $ffff
DEFW -2 ; $feff
DEFW 17+5 ; $16
DEFW 17-5 ; $0c
DEFW 17*5 ; $55
DEFW 17/5 ; $03
DEFW 17%5 ; $02
DEFW 15&7 ; $07
DEFW 4|3 ; $07
DEFW 3^15 ; $0c
DEFW !1 ; $00
DEFW !0 ; $01
DEFW ~1 ; $feff
DEFW 1 && 1 ; $01
DEFW 1 && 0 ; $00
DEFW 1 || 0 ; $01
DEFW 1 << 8 ; $0001
DEFW 8 >> 2 ; $02
DEFW 5 + 1 ; $04
DEFW 8 == 4*2 ; $01
DEFW 1+2 != 2+1 ; $00
DEFW 7 < 15 ; $01
DEFW 15 < 7 ; $00
DEFW 7 > 15 ; $00
DEFW 15 > -15 ; $01
DEFW 4 <= 4 ; $01
DEFW -4 <= -4 ; $01
DEFB 33*2+4 ; $46
DEFB 2*(36-(2*2))/ 17 *3 ; $03
DEFB 1,2,3,4,5,6,7
DEFB 'Hallo \n\\\xaa\x55\r world!'
buf5: EQU 2000h
DEFB 34,56h,"Long term evolution\0\0"
ORG $600
buftmp: DEFB 0,0,0,0
spstrt: DEFB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
DEFB 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
spend: DEFB 255