FEATURES {
    STARTADDRESS: default = $2400;
}

SYMBOLS {
    __STACKSIZE__:       type = weak, value = $0800; # 2k stack
    __STARTADDRESS__:    type = export, value = %S;
    syschk:              type = import;  # force inclusion of SYSCHK
    sramprep:            type = import;  # force inclusion of SRPREP
}

MEMORY {
    ZP:            file = "", define = yes, start = $0082,                  size = $007E;

# just $FFFF
    HEADER:        file = %O,               start = $0000,                  size = $0002;

# "system check" load chunk
    SYSCHKHDR:     file = %O,               start = $0000,                  size = $0004;
    SYSCHKCHNK:    file = %O,               start = $2E00,                  size = $0300;
    SYSCHKTRL:     file = %O,               start = $0000,                  size = $0006;

# "shadow RAM preparation" load chunk
    SRPREPHDR:     file = %O,               start = $0000,                  size = $0004;
    SRPREPCHNK:    file = %O, define = yes, start = %S,                     size = $7C20 - %S - $07FF;  # $07FF: space for temp. chargen buffer, 1K aligned
    SRPREPTRL:     file = %O,               start = $0000,                  size = $0006;

# "main program" load chunk
    MAINHDR:       file = %O,               start = $0000,                  size = $0004;
    RAM:           file = %O, define = yes, start = %S +
                                                    __LOWDATA_SIZE__,       size = $D000 -
                                                                                   __STACKSIZE__ -
                                                                                   %S -
                                                                                   __LOWDATA_SIZE__;

# defines entry point into program
    TRAILER:       file = %O,               start = $0000, size = $0006;

# memory beneath the ROM preceeding the character generator
    HIDDEN_RAM2:   file = "", define = yes, start = $D800, size = $0800;

# address of relocated character generator (same addess as ROM version)
    CHARGEN:       file = "", define = yes, start = $E000, size = $0400;

# memory beneath the ROM
    HIDDEN_RAM:    file = "", define = yes, start = $E400, size = $FFFA - $E400;
}

SEGMENTS {
    EXEHDR:      load = HEADER,                        type = ro;

    SYSCHKHDR:   load = SYSCHKHDR,                     type = ro,                optional = yes;
    SYSCHK:      load = SYSCHKCHNK,                    type = rw,  define = yes, optional = yes;
    SYSCHKTRL:   load = SYSCHKTRL,                     type = ro,                optional = yes;

    SRPREPHDR:   load = SRPREPHDR,                     type = ro;
    LOWDATA:     load = SRPREPCHNK,                    type = bss, define = yes;  # shared btw. SRPREP and RAM
    SRPREP:      load = SRPREPCHNK,                    type = rw,  define = yes;
    SHADOW_RAM:  load = SRPREPCHNK, run = HIDDEN_RAM,  type = rw,  define = yes, optional = yes;
    SHADOW_RAM2: load = SRPREPCHNK, run = HIDDEN_RAM2, type = rw,  define = yes, optional = yes;
    SRPREPTRL:   load = SRPREPTRL,                     type = ro;

    MAINHDR:     load = MAINHDR,                       type = ro;
    STARTUP:     load = RAM,                           type = ro,  define = yes;
    LOWCODE:     load = RAM,                           type = ro,  define = yes, optional = yes;
    INIT:        load = RAM,                           type = ro,                optional = yes;
    CODE:        load = RAM,                           type = ro,  define = yes;
    RODATA:      load = RAM,                           type = ro;
    DATA:        load = RAM,                           type = rw;
    BSS:         load = RAM,                           type = bss, define = yes;
    ZEROPAGE:    load = ZP,                            type = zp;
    EXTZP:       load = ZP,                            type = zp,                optional = yes;
    AUTOSTRT:    load = TRAILER,                       type = ro;
}
FEATURES {
    CONDES: type    = constructor,
            label   = __CONSTRUCTOR_TABLE__,
            count   = __CONSTRUCTOR_COUNT__,
            segment = INIT;
    CONDES: type    = destructor,
            label   = __DESTRUCTOR_TABLE__,
            count   = __DESTRUCTOR_COUNT__,
            segment = RODATA;
    CONDES: type    = interruptor,
            label   = __INTERRUPTOR_TABLE__,
            count   = __INTERRUPTOR_COUNT__,
            segment = RODATA,
            import  = __CALLIRQ__;
}