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66b27b0790
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405444d630
2
blk/001
2
blk/001
@ -10,7 +10,7 @@ MASTER INDEX
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550 TI-84+ Recipe 580 RC2014 Recipe
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550 TI-84+ Recipe 580 RC2014 Recipe
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620 Sega Master System Recipe
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620 Sega Master System Recipe
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650 AVR assembler 730 8086 assembler
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650 AVR assembler 730 8086 assembler
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810 PC/AT Recipe
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2
blk/730
2
blk/730
@ -2,7 +2,7 @@
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Work in progress. Load with "750 LOAD".
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Work in progress. Load with "750 LOAD".
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Test code at B731
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3
blk/751
3
blk/751
@ -1,8 +1,5 @@
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VARIABLE ORG
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VARIABLE ORG
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CREATE BIN( 0 , : BIN(+ BIN( @ + ;
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VARIABLE L1 VARIABLE L2 VARIABLE L3 VARIABLE L4
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: AL 0 ; : CL 1 ; : DL 2 ; : BL 3 ;
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: AL 0 ; : CL 1 ; : DL 2 ; : BL 3 ;
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: AH 4 ; : CH 5 ; : DH 6 ; : BH 7 ;
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: AH 4 ; : CH 5 ; : DH 6 ; : BH 7 ;
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: AX 8 ; : CX 9 ; : DX 10 ; : BX 11 ;
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: AX 8 ; : CX 9 ; : DX 10 ; : BX 11 ;
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: SP 12 ; : BP 13 ; : SI 14 ; : DI 15 ;
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: SP 12 ; : BP 13 ; : SI 14 ; : DI 15 ;
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: ES 0 ; : CS 1 ; : SS 2 ; : DS 3 ;
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8
blk/752
8
blk/752
@ -1,8 +1,2 @@
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( Splits word into msb/lsb, lsb being on TOS )
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: PC H@ ORG @ - ;
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: SPLITB
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256 /MOD SWAP
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;
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: PC H@ ORG @ - BIN( @ + ;
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: A, C, ;
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: A, C, ;
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( dst8 src8 -- modrm )
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: MODRMrr 0x7 AND 3 LSHIFT SWAP 0x7 AND OR 0xc0 OR ;
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9
blk/753
9
blk/753
@ -1,10 +1 @@
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: MOVri, SWAP 0xb0 OR A, A, ;
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: MOVri, SWAP 0xb0 OR A, A, ;
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: MOVrI, SWAP 0xb0 OR A, SPLITB A, A, ;
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: MOVsx, 0x8e A, SWAP MODRMrr A, ;
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: INT, 0xcd A, A, ;
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( no argument, flow ops are special )
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: JMP8, 0xeb A, ; : JMP16, 0xe9 A, ; : JZ, 0x74 A, ;
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: LODSB, 0xac A, ; : CLI, 0xfa A, ; : HLT, 0xf4 A, ;
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: ORrr, 0x08 A, MODRMrr A, ;
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: XORxx, 0x31 A, MODRMrr A, ;
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: CLD, 0xfc A, ; : STD, 0xfd A, ;
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16
blk/754
16
blk/754
@ -1,16 +0,0 @@
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( Place BEGIN, where you want to jump back and AGAIN after
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a relative jump operator. Just like BSET and BWR. )
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: BEGIN, PC ;
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: BSET PC SWAP ! ;
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( same as BSET, but we need to write a placeholder )
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( : FJR, PC 0 A, ;
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: IFZ, JRNZ, FJR, ;
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: IFNZ, JRZ, FJR, ;
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: IFC, JRNC, FJR, ;
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: IFNC, JRC, FJR, ; )
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: THEN,
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DUP PC ( l l pc )
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-^ 1- ( l off )
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( warning: l is a PC offset, not a mem addr! )
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SWAP ORG @ + BIN( @ - ( off addr )
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C! ;
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9
blk/755
9
blk/755
@ -1,9 +0,0 @@
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: FWR8 BSET 0 A, ;
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: FSET @ THEN, ;
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( : BREAK, FJR, 0x8000 OR ;
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: BREAK?, DUP 0x8000 AND IF
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0x7fff AND 1 ALLOT THEN, -1 ALLOT
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THEN ; )
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: AGAIN, ( BREAK?, ) PC - 1- A, ;
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: BWR @ AGAIN, ;
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14
blk/811
14
blk/811
@ -1,14 +0,0 @@
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: _filler 510 H@ ORG @ - DO 0 A, LOOP 0x55 A, 0xaa A, ;
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H@ ORG ! 0x7c00 BIN( ! ( BIOS loads boot bin at 0x7c00 )
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JMP8, L1 FWR8 ( start )
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L2 BSET ( msg ) ," Hello, World!" 0 A,
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L1 FSET ( start )
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CLI, CLD, AX AX XORxx, DS AX MOVsx,
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AH 0 MOVri, AL 2 MOVri, ( 80x25 BW video mode ) 0x10 INT,
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SI L2 @ ( msg ) MOVrI, AH 0x0e MOVri, ( print char )
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L1 BSET ( loop ) LODSB, AL AL ORrr, ( end of str? )
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JZ, L2 FWR8 ( next ) 0x10 INT, ( print char )
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JMP8, L1 ( loop ) BWR
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L2 FSET ( next ) AH 0 MOVri, 0x16 INT, ( read kbd )
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AH 0x0e MOVri, 0x10 INT, ( spit read char ) HLT, ( done )
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_filler
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@ -1,16 +0,0 @@
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TARGET = boot.bin
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BASEDIR = ../..
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EDIR = $(BASEDIR)/emul
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STAGE = $(EDIR)/stage
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.PHONY: all
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all: $(TARGET)
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$(TARGET): xcomp.fs $(STAGE)
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cat xcomp.fs | $(STAGE) > $@
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$(STAGE):
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$(MAKE) -C $(EDIR) stage
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.PHONY: emul
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emul: $(TARGET)
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qemu-system-i386 -fda $(TARGET)
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@ -1,3 +0,0 @@
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# PC/AT recipe
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Work in progress.
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@ -1,4 +0,0 @@
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750 LOAD
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811 LOAD
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ORG @ 256 /MOD 2 PC! 2 PC!
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H@ 256 /MOD 2 PC! 2 PC!
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