# Nova128 compiler memory map (E01-S05). docs/memory-map.md explains each
# region and the evidence behind it. ld65 refuses any segment that overflows
# its area, so this layout is also the compiler's capacity check.
#
# Bank 0 (CR=$0E)                      Bank 1 (CR=$4E)
#   $0000-$12FF system (BASIC/KERNAL)    $0000-$1FFF hidden by common RAM
#   $1300-$18FF COMMON (copied at init)  $2000-$BFFF BANK1 compiler tables
#   $1900-$19FF DISKBUF                  $C000-$FFFF system ROM (unmapped RAM)
#   $1A00-$1AFF private zero page (P0)
#   $1B00-$1BEF SCRATCH (common)
#   $1BF0-$1BFF MAILBOX
#   $1C01-$B7FF MAIN (stub, code, data)
#   $B800-$BFFF SWSTACK
#   $C000-$FFFF system ROM

MEMORY {
    # Logical zero page. With P0 -> $1A00 these are physical $1A02-$1AFF.
    # $00/$01 are the 8502 port and are never allocated.
    ZP:        file = "", start = $0002, size = $00FE, type = rw, define = yes;

    LOADADDR:  file = %O, start = $1BFF, size = $0002;
    HEADER:    file = %O, start = $1C01, size = $000C;
    MAIN:      file = %O, start = $1C0D, size = $9BF3, define = yes;   # to $B7FF

    COMMONRAM: file = "", start = $1300, size = $0600, define = yes;   # to $18FF
    DISKBUF:   file = "", start = $1900, size = $0100, define = yes;
    SCRATCH:   file = "", start = $1B00, size = $00F0, define = yes;
    MAILBOX:   file = "", start = $1BF0, size = $0010, define = yes;
    SWSTACK:   file = "", start = $B800, size = $0800, define = yes;   # to $BFFF

    BANK1:     file = "", start = $2000, size = $A000, define = yes;   # to $BFFF
}

SEGMENTS {
    ZEROPAGE:  load = ZP,        type = zp,  optional = yes;
    LOADADDR:  load = LOADADDR,  type = ro;
    EXEHDR:    load = HEADER,    type = ro;
    STARTUP:   load = MAIN,      type = ro;   # first: SYS 7181 enters at $1C0D
    CODE:      load = MAIN,      type = ro;
    RODATA:    load = MAIN,      type = ro,  optional = yes;
    DATA:      load = MAIN,      type = rw,  optional = yes;
    COMMON:    load = MAIN, run = COMMONRAM, type = rw, define = yes;
    BSS:       load = MAIN,      type = bss, optional = yes, define = yes;
    DISKBUF:   load = DISKBUF,   type = bss, optional = yes;
    SCRATCH:   load = SCRATCH,   type = bss, optional = yes;
    MAILBOX:   load = MAILBOX,   type = bss, optional = yes;
    SWSTACK:   load = SWSTACK,   type = bss, optional = yes;
    TABLES:    load = BANK1,     type = bss, optional = yes, define = yes;
}

SYMBOLS {
    # Physical bank-0 page that P0 maps to logical zero page in compiler states.
    __COMPILER_ZP_PAGE__: type = export, value = $1A;
}