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- ; zasm
- ;
- ; Reads input from specified blkdev ID, assemble the binary in two passes and
- ; spit the result in another specified blkdev ID.
- ;
- ; We don't buffer the whole source in memory, so we need our input blkdev to
- ; support Seek so we can read the file a second time. So, for input, we need
- ; GetC and Seek.
- ;
- ; For output, we only need PutC. Output doesn't start until the second pass.
- ;
- ; The goal of the second pass is to assign values to all symbols so that we
- ; can have forward references (instructions referencing a label that happens
- ; later).
- ;
- ; Labels and constants are both treated the same way, that is, they can be
- ; forward-referenced in instructions. ".equ" directives, however, are evaluated
- ; during the first pass so forward references are not allowed.
- ;
- ; *** Requirements ***
- ; strncmp
- ; addDE
- ; addHL
- ; upcase
- ; unsetZ
- ; intoDE
- ; intoHL
- ; writeHLinDE
- ; findchar
- ; parseHex
- ; parseHexPair
- ; blkSel
- ; blkSet
- ; fsFindFN
- ; fsOpen
- ; fsGetC
- ; cpHLDE
- ; parseArgs
- ; _blkGetC
- ; _blkPutC
- ; _blkSeek
- ; _blkTell
- ; printstr
- ; FS_HANDLE_SIZE
- ; BLOCKDEV_SIZE
-
- #include "user.h"
-
- ; *** Overridable consts ***
- ; Maximum number of symbols we can have in the global and consts registry
- .equ ZASM_REG_MAXCNT 0xff
-
- ; Maximum number of symbols we can have in the local registry
- .equ ZASM_LREG_MAXCNT 0x40
-
- ; Size of the symbol name buffer size. This is a pool. There is no maximum name
- ; length for a single symbol, just a maximum size for the whole pool.
- ; Global labels and consts have the same buf size
- .equ ZASM_REG_BUFSZ 0x1000
-
- ; Size of the names buffer for the local context registry
- .equ ZASM_LREG_BUFSZ 0x200
-
- ; ******
-
- #include "err.h"
- .org USER_CODE
-
- jp zasmMain
-
- #include "zasm/const.asm"
- #include "lib/util.asm"
- #include "zasm/util.asm"
- .equ IO_RAMSTART USER_RAMSTART
- #include "zasm/io.asm"
- .equ TOK_RAMSTART IO_RAMEND
- #include "zasm/tok.asm"
- #include "lib/parse.asm"
- .equ INS_RAMSTART TOK_RAMEND
- #include "zasm/instr.asm"
- .equ DIREC_RAMSTART INS_RAMEND
- #include "zasm/directive.asm"
- #include "zasm/parse.asm"
- #include "zasm/expr.asm"
- .equ SYM_RAMSTART DIREC_RAMEND
- #include "zasm/symbol.asm"
- .equ ZASM_RAMSTART SYM_RAMEND
- #include "zasm/main.asm"
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