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122 lines
2.9 KiB
Plaintext
122 lines
2.9 KiB
Plaintext
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; Z33MAC.LIB : Macros for use with ZCPR33
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; General purpose macros
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putreg macro
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push hl ; Save registers in order
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push de
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push bc
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endm
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getreg macro
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pop bc ; Restore registers in order
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pop de
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pop hl
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endm
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swap macro
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rrca ; Exchange nibbles
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rrca
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rrca
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rrca
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endm
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;----------------------------------------
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; Macro for forming option bytes
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; This macro generates a byte with bits corresponding to up to 8 option
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; flags. The bits are filled in the order of the parameters and are right
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; justified in the byte.
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optflag macro f1,f2,f3,f4,f5,f6,f7,f8
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flag defl 0 ;; initial value
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irp temp,<f1,f2,f3,f4,f5,f6,f7,f8>
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if not nul temp
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flag defl flag shl 1
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if temp
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flag defl flag or 1
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endif ;;temp
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endif ;;not nul temp
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endm ;; irp
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defb low flag
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endm ;; optflag
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;-----------------------------------------------------------------------------
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; Command table entry definition macro
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; Macro to form an entry for one command in the table. The first parameter is
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; the name to be used for the command (no quotes); the second parameter is the
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; flag that indicates whether or not the command is to be enabled; the third
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; parameter is the wheel control flag; and the last parameter is the jump
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; address to the code that carries out the command. The command names are
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; automatically padded out to the correct length (they will be truncated and
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; an error message will result if a command name is too long). The characters
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; in the command name are automatically converted to upper case.
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command macro cmdname,enableflag,wheelflag,address
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if enableflag ;; Generate command only if enabled
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whlmask defl wheelflag ;; Initialize variables
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count defl cmdsize ;; Initialize to size of each command name
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irpc char,cmdname ;; Repeat over letters in command name
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count defl count - 1 ;; Count down characters in name
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if [ count lt cmdsize ]
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;; If character is lower case, convert to upper case
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if [ '&char' ge 'a' ] and [ '&char' le 'z' ]
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if whlmask
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defb [ '&char' and 5fh ] + 80h
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else ;;not whlmask
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defb [ '&char' and 5fh ]
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endif ;;whlmask
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else ;;not lower case
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if whlmask
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defb '&char' + 80h ;; If controlled by wheel, set high bit
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else ;;not whlmask
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defb '&char' ;; If not restricted, leave high bit clear
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endif ;;whlmask
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endif ;;lower case
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endif ;;[ count lt cmdsize ]
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whlmask defl false ;; Turn off high-bit setting after first char
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endm ;irpc
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;; Pad command name with blanks
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if [ count gt cmdsize ] ;; If we underflowed
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*** Command name "&cmdname" is too long / truncated ***
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else
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rept count
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defb ' '
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endm
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endif ;[ count gt cmdsize ]
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dw address ;; Dispatch address for command
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endif ;enable
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endm ;command
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; End Z33MAC.LIB
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