; variables common to all three utilites.
MCT            struc
                                        ;; Master Control Table, 10 bytes per entry
                                        ;; structure for table that describes all the parms
                                        ;; there is one entry for each possible parameter
                                        ;; on the command line.
                                        ;; each alias gets its own entry.
                                        ;; each DRIVE: letter even gets its own entry.
                                        ;; BP and TheBase will point to the current
                                        ;; entry in the table.
                                        ;; Generated by the ACCEPT macro
ExtNameAddr    dw        ?              ;; pointer to counted string
                                        ;; command name e.g. RAM EXT EXTENDED
AuxInput       dw        ?              ;; e.g. implied power level of the cpu desired
                                        ;; only 16 bits.
                                        ;; also encodes driver letter A:=1 B:=2 etc.
                                        ;; usually just 1 meaning simple presence desired
Flags          db        ?              ;; flags telling which suffixes allowed
                                        ;; also encodes info about where LevelWanted
                                        ;; comes from, i.e. is this an Implied, Capacity or
                                        ;; version type parameter.
Defaults       db        ?              ;; flags telling which suffixes to assume
                                        ;; if none given.  Bang allows one of them.
                                        ;; generally will be ! or +!
TestAddr       dw        ?              ;; Address of routine to test for presence
                                        ;; It returns the level of presence in DX:AX
                                        ;; e.g. 1=present 0=absent.
                                        ;; or amount of free RAM etc.
                                        ;; for most parms (non colon type), DX can
                                        ;; be ignored.
                                        ;; Capacity-type routines must compute DX:AX.
                                        ;; Routine can trash any register except
                                        ;; SS:SP CS:IP
DispAddr       dw        ?              ;; Address of routine to display current state
                                        ;; It expects level of presence in DX:AX
                                        ;; e.g. 1=present 0=absent.
                                        ;; or amount of free RAM etc.
                                        ;; for most parms (non colon type), DX can
                                        ;; be ignored.
                                        ;; Capacity-type routines must computer DX:AX.
                                        ;; Routine can trash any register except
                                        ;; SS:SP CS:IP
MCT            ends
;==============================================================
; V A R I A B L E S
data           segment
WantLevel      dd        0              ; level we want for a feature
                                        ; for simple cases 0=not present 1=present
                                        ; for CPU - is a measure of power.
                                        ; for DOS - is a measure of version
                                        ; for RAM - is capacity in bytes.
                                        ; for TIME - is hours:minutes, mins past midnight
GotLevel       dd        0              ; Level we HAVE for a feature, according to
                                        ; the test
                                        ; It is usually carried about in
                                        ; in DX:AX.
TheCapacity    dd        0              ; desired capacity parsed from /RAM:400K
TheVersion     dw        0              ; desired version parsed from /DOS3.1 = 310
PreviousSuccess db       0              ; -1 means at least one previous group of tests
                                        ; separated by OR succeeded
                                        ; 0 no previous OR-type group of tests has yet
                                        ; succeeded.
Success        db        0              ; -1 means doing fine in this group of tests
                                        ; 0 means a test failed
OkMask         db        0              ; bit mask that says if level allowed to
                                        ; be too small, just right or too big.
                                        ; calculated from any explicit suffixes
                                        ; or from a computed default.
                                        ; Bit on, means allow that "Goldilocks" condition
TheBase        dw        0              ; Points to entry in current Master Control Table
                                        ; From there we can get everything
ComAddr        dw        0              ; when a single parm is broken in 3 parts
                                        ; address of start of first part e.g.
                                        ; RAM in RAM:400K+
                                        ; com = command
ComLen         dw        0              ; length of first part e.g. 3 length of RAM
CapAddr        dw        0              ; address of second part of parm: e.g. 400K
                                        ; cap = capacity
CapLen         dw        0              ; length of second part of parm e.g. 4
SufAddr        dw        0              ; third part of parm e.g. +
                                        ; suf = suffix
SufLen         dw        0              ; length of third part e.g. 1
AlpAddr        dw        0              ; in /MSDOS3.1+ address of string MSDOS
                                        ; alp = alphabetic
AlpLen         dw        0              ; in /MSDOS3.1+ len of string MSDOS i.e. 5
VerAddr        dw        0              ; in /MSDOS3.1+ address of string 3.1
                                        ; ver = version
VerLen         dw        0              ; in /MSDOS3.1+ len of string 3.1 i.e. 3
                                        ; of course the puns are intentional.
CommaSep       db        ' '            ; character for thousands separations.
                                        ; usually a comma, sometimes decimal point
DeciSep        db        ' '            ; decimal point.  Country specific.
                                        ; usually a decimal point, sometimes comma.
DeciSep2       db        ' '            ; alternate decimal point.
                                        ; sometimes a comma, when comma treated as decmial.
data           ends