zasm: add ".bin" directive

Also, remove zasm/test7 because it changes too much all time time
(whenever zasm changes) and isn't precise enough. Too much noise,
not worth it.

apps/zasm/README.md

@@ -139,15 +139,8 @@ allowed. An included file cannot have an `#inc` directive.
           and output its binary content as is the code has been in the includer
           file.
 
-## Compatibility with scas
-
-This project was initially assembled with [scas][scas], but now that zasm self-
-assembles, it isn't used any more. However, the kernel and zasm code are still
-written to be compatible with scas because scas is still used as a comparison
-tool in tests.
-
-There are, however, features I want to implement in zasm that will break
-compatibility with scas, so in the near future, scas will be left behind.
+**.bin**: Takes a string literal as an argument. Open the file name specified
+          in the argument in the currently active filesystem and outputs its
+          contents directly.
 
 [libz80]: https://github.com/ggambetta/libz80
-[scas]: https://github.com/KnightOS/scas

apps/zasm/directive.asm

@@ -7,6 +7,7 @@
 .equ	D_FIL	0x04
 .equ	D_OUT	0x05
 .equ	D_INC	0x06
+.equ	D_BIN	0x07
 .equ	D_BAD	0xff
 
 ; *** Variables ***
@@ -23,6 +24,7 @@ directiveNames:
 	.db	".FIL"
 	.db	".OUT"
 	.db	"#inc"
+	.db	".BIN"
 
 ; This is a list of handlers corresponding to indexes in directiveNames
 directiveHandlers:
@@ -33,6 +35,7 @@ directiveHandlers:
 	.dw	handleFIL
 	.dw	handleOUT
 	.dw	handleINC
+	.dw	handleBIN
 
 handleDB:
 	push	hl
@@ -254,12 +257,31 @@ handleINC:
 	call	unsetZ
 	ret
 
+handleBIN:
+	call	readWord
+	jr	nz, .badfmt
+	; HL points to scratchpad
+	call	enterDoubleQuotes
+	jr	nz, .badfmt
+	call	ioSpitBin
+	jr	nz, .badfn
+	cp	a		; ensure Z
+	ret
+.badfmt:
+	ld	a, ERR_BAD_FMT
+	jr	.error
+.badfn:
+	ld	a, ERR_FILENOTFOUND
+.error:
+	call	unsetZ
+	ret
+
 ; Reads string in (HL) and returns the corresponding ID (D_*) in A. Sets Z if
 ; there's a match.
 getDirectiveID:
 	push	bc
 	push	de
-	ld	b, D_INC+1		; D_INC is last
+	ld	b, D_BIN+1		; D_BIN is last
 	ld	c, 4
 	ld	de, directiveNames
 	call	findStringInList

apps/zasm/io.asm

@@ -58,7 +58,9 @@
 .equ	IO_INC_LINENO	IO_LINENO+2
 ; Line number (can be top-level or include) when ioSavePos was last called.
 .equ	IO_SAVED_LINENO	IO_INC_LINENO+2
-.equ	IO_RAMEND	IO_SAVED_LINENO+2
+; Handle for the ioSpitBin
+.equ	IO_BIN_HDL	IO_SAVED_LINENO+2
+.equ	IO_RAMEND	IO_BIN_HDL+FS_HANDLE_SIZE
 
 ; *** Code ***
 
@@ -238,6 +240,27 @@ ioOpenInclude:
 	cp	a		; ensure Z
 	ret
 
+; Open file specified in (HL) and spit its contents through ioPutC
+; Sets Z on success.
+ioSpitBin:
+	call	fsFindFN
+	ret	nz
+	push	hl		; --> lvl 1
+	ld	ix, IO_BIN_HDL
+	call	fsOpen
+	ld	hl, 0
+.loop:
+	ld	ix, IO_BIN_HDL
+	call	fsGetC
+	jr	nz, .loopend
+	call	ioPutC
+	inc	hl
+	jr	.loop
+.loopend:
+	pop	hl		; <-- lvl 1
+	cp	a		; ensure Z
+	ret
+
 ; Return current lineno in HL and, if in an include, its lineno in DE.
 ; If not in an include, DE is set to 0
 ioLineNo:

tools/tests/zasm/test10.asm

@@ -0,0 +1,3 @@
+inc	a
+.bin	"err.h"
+inc	b

tools/tests/zasm/test10.asm.expected

@@ -0,0 +1,15 @@
+<; Error codes used throughout the kernel
+
+; The command that was type isn't known to the shell
+.equ	SHELL_ERR_UNKNOWN_CMD	0x01
+
+; Arguments for the command weren't properly formatted
+.equ	SHELL_ERR_BAD_ARGS	0x02
+
+.equ	BLOCKDEV_ERR_OUT_OF_BOUNDS	0x03
+.equ	BLOCKDEV_ERR_UNSUPPORTED	0x04
+
+; IO routines (GetC, PutC) returned an error in a load/save command
+.equ	SHELL_ERR_IO_ERROR	0x05
+
+

tools/tests/zasm/test7.asm

@@ -1,48 +0,0 @@
-.equ    USER_CODE       0x4800
-.equ    USER_RAMSTART   0x5800
-.equ    FS_HANDLE_SIZE  6
-.equ    BLOCKDEV_SIZE   8
-
-; *** JUMP TABLE ***
-.equ    strncmp        0x03
-.equ    addDE          0x06
-.equ    addHL          0x09
-.equ    upcase         0x0c
-.equ    unsetZ         0x0f
-.equ    intoDE         0x12
-.equ    intoHL         0x15
-.equ    writeHLinDE    0x18
-.equ    findchar       0x1b
-.equ    parseHex       0x1e
-.equ    parseHexPair   0x21
-.equ    blkSel         0x24
-.equ    blkSet         0x27
-.equ    fsFindFN       0x2a
-.equ    fsOpen         0x2d
-.equ    fsGetC         0x30
-.equ    cpHLDE         0x33
-.equ    parseArgs      0x36
-.equ    _blkGetC       0x39
-.equ    _blkPutC       0x3c
-.equ    _blkSeek       0x3f
-.equ    _blkTell       0x42
-.equ    printstr       0x45
-
-#include "err.h"
-#include "zasm/const.asm"
-#include "lib/util.asm"
-#include "zasm/util.asm"
-.equ	IO_RAMSTART	USER_RAMSTART
-#include "zasm/io.asm"
-.equ	SYM_RAMSTART	IO_RAMEND
-#include "zasm/symbol.asm"
-#include "lib/parse.asm"
-#include "zasm/parse.asm"
-.equ	TOK_RAMSTART	SYM_RAMEND
-#include "zasm/tok.asm"
-.equ	DIREC_RAMSTART	TOK_RAMEND
-#include "zasm/directive.asm"
-#include "zasm/instr.asm"
-#include "zasm/expr.asm"
-.equ	ZASM_RAMSTART	TOK_RAMEND
-#include "zasm/main.asm"