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TODOs

App consists of 4 areas. These have defined origin (.org directive). They also have a defined offset in output file, but this directive (.seek) does exist in z80asm, but not in sdcc/sdasz80.

I assume that the positioning in output file is a linker task, so there is no directive in sdcc for that. The order of areas can be defined, by list these in correct order in first file (some asm file or crt0.s). But this is for address space, not for location in output file.

Part loc. start loc. end padded until file offset Desired file offset comment
strap 0x2000 0x2070 0x0 0x800 delta=-0x800
app1 0x2071 0x2145 0x21ff 0x71 0x871 delta=-0x800
app2 0x2200 0x2417 0x2900 0x200 0xa00 delta=-0x800
header 0xa000 0xa2cb 0xa7ff 0x8000 0x0 delta=0x8000
ok(.org) egal map-Datei? evtl eingeben ok(seek)

https://stackoverflow.com/questions/44358613/cant-figure-out-how-to-write-interrupt-handler-for-z80-using-sdcc

Defining area order

https://stackoverflow.com/questions/1606926/code-banking-with-sdcc

//bank.asm
    .area HOME    (CODE)
    .area GSINIT0 (CODE)
    .area GSINIT1 (CODE)
    .area GSINIT2 (CODE)
    .area GSINIT3 (CODE)
    .area GSINIT4 (CODE)
    .area GSINIT5 (CODE)
    .area GSINIT  (CODE)
    .area GSFINAL (CODE)
    .area CSEG    (CODE)
    .area HOME    (CODE)

Z-80 Code Generation with SDCC

http://bricologica.com/projects/z80/2015/08/17/z-80-code-generation-with-sdcc.html

SDCC Part 2 of 4 : Compiling our first C program http://norecess.cpcscene.net/sdcc-part-2---compiling-our-first-c-program.html

CPC - Introduction to programming in C with SDCC: Compiling and testing a "Hello World" http://www.cpcmania.com/Docs/Programming/Introduction_to_programming_in_SDCC_Compiling_and_testing_a_Hello_World.htm