recipes/pcat: first steps into 8086!

blk/001

@@ -10,7 +10,7 @@ MASTER INDEX
 550 TI-84+ Recipe             580 RC2014 Recipe
 620 Sega Master System Recipe
 650 AVR assembler             730 8086 assembler
-
+810 PC/AT Recipe
 
 
 

blk/730

@@ -2,7 +2,7 @@
 
 Work in progress. Load with "750 LOAD".
 
-Test code at B731
+
 
 
 

blk/731

@@ -1,12 +0,0 @@
-H@ ORG !
-JMP8, L1 FWR8 ( start )
-L2 BSET ( msg ) ," Hello, World!" 0 A,
-L1 FSET ( start )
-CLI, AH 0 MOVri, AL 2 MOVri, 0x10 INT,
-SI L2 @ ( msg ) MOVrI, AH 0x0e MOVri,
-L1 BSET ( loop ) LODSB, AL AL ORrr,
-JZ, L2 FWR8 ( next ) 0x10 INT,
-JMP8, L1 ( loop ) BWR
-L2 FSET ( next ) AH 0 MOVri, 0x16 INT,
-AH 0x0e MOVri, 0x16 INT, HLT,
-PC ORG @ DUMP

blk/751

@@ -1,4 +1,5 @@
 VARIABLE ORG
+CREATE BIN( 0 , : BIN(+ BIN( @ + ;
 VARIABLE L1 VARIABLE L2 VARIABLE L3 VARIABLE L4
 : AL 0 ; : CL 1 ; : DL 2 ; : BL 3 ;
 : AH 4 ; : CH 5 ; : DH 6 ; : BH 7 ;

blk/752

@@ -2,7 +2,7 @@
 : SPLITB
     256 /MOD SWAP
 ;
-: PC H@ ORG @ - ;
+: PC H@ ORG @ - BIN( @ + ;
 : A, C, ;
 ( dst8 src8 -- modrm )
 : MODRMrr 0x7 AND 3 LSHIFT SWAP 0x7 AND OR 0xc0 OR ;

blk/754

@@ -12,5 +12,5 @@
     DUP PC          ( l l pc )
     -^ 1-           ( l off )
     ( warning: l is a PC offset, not a mem addr! )
-    SWAP ORG @ + ( BIN( @ - ) ( off addr )
+    SWAP ORG @ + BIN( @ - ( off addr )
     C! ;

blk/810

@@ -0,0 +1,5 @@
+PC/AT Recipe
+
+Work in progress.
+
+811 Hello World boot

blk/811

@@ -0,0 +1,14 @@
+: _filler 510 H@ ORG @ - DO 0 A, LOOP 0x55 A, 0xaa A, ;
+H@ ORG ! 0x7c00 BIN( ! ( BIOS loads boot bin at 0x7c00 )
+JMP8, L1 FWR8 ( start )
+L2 BSET ( msg ) ," Hello, World!" 0 A,
+L1 FSET ( start )
+CLI,
+AH 0 MOVri, AL 2 MOVri, ( 80x25 BW video mode ) 0x10 INT,
+SI L2 @ ( msg ) MOVrI, AH 0x0e MOVri, ( print char )
+L1 BSET ( loop ) LODSB, AL AL ORrr, ( end of str? )
+JZ, L2 FWR8 ( next ) 0x10 INT, ( print char )
+JMP8, L1 ( loop ) BWR
+L2 FSET ( next ) AH 0 MOVri, 0x16 INT, ( read kbd )
+AH 0x0e MOVri, 0x10 INT, ( spit read char ) HLT, ( done )
+_filler

recipes/pcat/Makefile

@@ -0,0 +1,16 @@
+TARGET = boot.bin
+BASEDIR = ../..
+EDIR = $(BASEDIR)/emul
+STAGE = $(EDIR)/stage
+
+.PHONY: all
+all: $(TARGET) 
+$(TARGET): xcomp.fs $(STAGE)
+	cat xcomp.fs | $(STAGE) > $@
+
+$(STAGE):
+	$(MAKE) -C $(EDIR) stage
+
+.PHONY: emul
+emul: $(TARGET)
+	qemu-system-i386 -fda $(TARGET)

recipes/pcat/README.md

@@ -0,0 +1,3 @@
+# PC/AT recipe
+
+Work in progress.

recipes/pcat/xcomp.fs

@@ -0,0 +1,4 @@
+750 LOAD
+811 LOAD
+ORG @ 256 /MOD 2 PC! 2 PC!
+H@ 256 /MOD 2 PC! 2 PC!