FEATURES {
    STARTADDRESS: default = $2400;
}
SYMBOLS {
    __EXEHDR__:       type = import;
    __SYSTEM_CHECK__: type = import;  # force inclusion of "system check" load chunk
    __AUTOSTART__:    type = import;  # force inclusion of autostart "trailer"
    __STACKSIZE__:    type = weak, value = $0800; # 2k stack
    __OVERLAYSIZE__:  type = weak, value = $1000; # 4k overlay
    __STARTADDRESS__: type = export, value = %S;
}
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 + __OVERLAYSIZE__, size = $7C20 - %S - __OVERLAYSIZE__ - $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;
    MAIN:        file = %O, define = yes, start = %S + __OVERLAYSIZE__ +
                                                       __LOWBSS_SIZE__, size = $D000 - __STACKSIZE__ - %S - __OVERLAYSIZE__ - __LOWBSS_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;

# overlays
    OVL1:        file = "%O.1",           start = %S,                   size = __OVERLAYSIZE__;
    OVL2:        file = "%O.2",           start = %S,                   size = __OVERLAYSIZE__;
    OVL3:        file = "%O.3",           start = %S,                   size = __OVERLAYSIZE__;
    OVL4:        file = "%O.4",           start = %S,                   size = __OVERLAYSIZE__;
    OVL5:        file = "%O.5",           start = %S,                   size = __OVERLAYSIZE__;
    OVL6:        file = "%O.6",           start = %S,                   size = __OVERLAYSIZE__;
    OVL7:        file = "%O.7",           start = %S,                   size = __OVERLAYSIZE__;
    OVL8:        file = "%O.8",           start = %S,                   size = __OVERLAYSIZE__;
    OVL9:        file = "%O.9",           start = %S,                   size = __OVERLAYSIZE__;
}
SEGMENTS {
    ZEROPAGE:    load = ZP,                            type = zp;
    EXTZP:       load = ZP,                            type = zp,                optional = yes;

    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;
    LOWBSS:      load = SRPREPCHNK,                    type = bss, define = yes;  # shared btw. SRPREPCHNK and RAM, not zero initialized
    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 = MAIN,                          type = ro,  define = yes;
    LOWCODE:     load = MAIN,                          type = ro,  define = yes, optional = yes;
    ONCE:        load = MAIN,                          type = ro,                optional = yes;
    CODE:        load = MAIN,                          type = ro,  define = yes;
    RODATA:      load = MAIN,                          type = ro;
    DATA:        load = MAIN,                          type = rw;
    INIT:        load = MAIN,                          type = rw,                optional = yes;
    BSS:         load = MAIN,                          type = bss, define = yes;
    AUTOSTRT:    load = TRAILER,                       type = ro;

    OVERLAY1:    load = OVL1,                          type = ro,  define = yes, optional = yes;
    OVERLAY2:    load = OVL2,                          type = ro,  define = yes, optional = yes;
    OVERLAY3:    load = OVL3,                          type = ro,  define = yes, optional = yes;
    OVERLAY4:    load = OVL4,                          type = ro,  define = yes, optional = yes;
    OVERLAY5:    load = OVL5,                          type = ro,  define = yes, optional = yes;
    OVERLAY6:    load = OVL6,                          type = ro,  define = yes, optional = yes;
    OVERLAY7:    load = OVL7,                          type = ro,  define = yes, optional = yes;
    OVERLAY8:    load = OVL8,                          type = ro,  define = yes, optional = yes;
    OVERLAY9:    load = OVL9,                          type = ro,  define = yes, optional = yes;
}
FEATURES {
    CONDES: type    = constructor,
            label   = __CONSTRUCTOR_TABLE__,
            count   = __CONSTRUCTOR_COUNT__,
            segment = ONCE;
    CONDES: type    = destructor,
            label   = __DESTRUCTOR_TABLE__,
            count   = __DESTRUCTOR_COUNT__,
            segment = RODATA;
    CONDES: type    = interruptor,
            label   = __INTERRUPTOR_TABLE__,
            count   = __INTERRUPTOR_COUNT__,
            segment = RODATA,
            import  = __CALLIRQ__;
}