AuxMemApple near completion

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AuxMemApple near completion

Hi!  I am working on my AuxMemApple library for the Apple2/cc65.  It is a memory extender that allows the usage of aux memory from cc65 programs.  I believe it's better than cc65's em libraries because it provides a way to access any byte or word in aux memory and string and memory functions that mirror the standard memory and string functions.  The library works so far.  Right now, I need to provide a way to reconnect the RAM drive at the end of the program, some demo programs and to write the manual.  Then, the first beta should be ready to upload.

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I spent the past hour trying

I spent the past hour trying to get an Apple2enh port of my MadLib program to compile.  The latest error was a Memory Area Not Found error from the linker on the "HIGHCODE" segment.  I used the grepWIn utility to search for the name.  I didn't find it.  :(  I'm using a custom config and a recent version of cc65.  Following are the config file:

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# Configuration for ProDOS 8 system programs (allowing for 3KB in LC)

SYMBOLS {    __EXEHDR__:    type = import;    __FILETYPE__:  type = weak, value = $00FF; # ProDOS file type    __STACKSIZE__: type = weak, value = $0800; # 2k stack    __LCADDR__:    type = weak, value = $D400; # Behind quit code    __LCSIZE__:    type = weak, value = $0C00; # Rest of bank two    __PRODOS_NUMFILES__: value = 4, type = weak; # max. # files open at a time}MEMORY {    ZP:     file = "", define = yes, start = $0080,         size = $0080;#ProDOS's file buffers, large enough for four files.    PDIO:   start = $1000, size = $1000,        define = yes;    HEADER: file = %O,               start = $2000 - $003A, size = $003A;    MAIN:   file = %O, define = yes, start = $2000,         size = $BF00 - $2000;    BSS:    file = "",               start = __ONCE_RUN__,  size = $BF00 - __STACKSIZE__ - __ONCE_RUN__;    LC:     file = "", define = yes, start = __LCADDR__,    size = __LCSIZE__;#Keyboard buffer and BASIC's ML buffer.  Probably not used by most cc65 programs.    KEYBUF: file = "keyb",         start = $0200, size = $0200, define = yes;#Unused memory between the screen buffer and the beginning of the#file buffers.    LOWBUF: file = "lowmem",       start = $0800, size = $0800, define = yes;    AUXMEM: file = "auxro",             define = yes, start = $0800, size = $B800;}SEGMENTS {    ZEROPAGE: load = ZP,             type = zp;    EXEHDR:   load = HEADER,         type = ro,  optional = yes;    STARTUP:  load = MAIN,           type = ro;    LOWCODE:  load = MAIN,           type = ro,  optional = yes;    CODE:     load = MAIN,           type = ro;    RODATA:   load = MAIN,           type = ro;    DATA:     load = MAIN,           type = rw;    INIT:     load = MAIN,           type = rw;    ONCE:     load = MAIN,           type = ro,  define   = yes;    LC:       load = MAIN, run = LC, type = ro,  optional = yes;    BSS:      load = BSS,            type = bss, define   = yes;    KEYBRO:   load = KEYBUF,          type = ro,  define   = yes, optional = yes;    KEYBRW:   load = KEYBUF,          type = rw,  define   = yes, optional = yes;    KEYBBSS:  load = KEYBUF,          type = bss, define   = yes, optional = yes;    LOWCO:   load = LOWBUF,          type = ro,  define   = yes, optional = yes;    LOWRO:   load = LOWBUF,          type = ro,  define   = yes, optional = yes;    LOWRW:   load = LOWBUF,          type = rw,  define   = yes, optional = yes;    LOWBSS:  load = LOWBUF,          type = bss, define   = yes, optional = yes;    AUXRO:    load = AUXMEM,          type = ro,  define   = yes, optional = yes;    AUXRW:    load = AUXMEM,          type = rw,  define   = yes, optional = yes;    AUXBSS:   load = AUXMEM,          type = bss, 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__;}-----------------------

and the build batch file:

-----------------------

@echo off

::You may need to change the path in the folowing line:cl65 -t apple2enh -C apple2enh-system_aux_prodosi.cfg -Ors -o madlib.system main.c altinput.c getmod.c writestory.c stories.c loadmain.c print.s printi.s zeropage_vars.s rand.s strlen2.s auxmemapple.lib prodosi.lib a2simpio.lib

java -jar g:\quick\ac.jar -d madlib.dsk madlib.system java -jar g:\quick\ac.jar -as madlib.dsk madlib.system SYS < madlib.systemjava -jar g:\quick\ac.jar -d madlib.dsk auxro java -jar g:\quick\ac.jar -p madlib.dsk auxro BIN < auxrojava -jar g:\quick\ac.jar -d madlib.dsk lowmemjava -jar g:\quick\ac.jar -p madlib.dsk lowmem BIN < lowmempause--------------------------

BTW, sorry I couldn't supply them as attachments: I don't see the option in the reply page.  :(

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Never mind: I found the error

Never mind: I found the error: I neglected to update the library file.  It seems to work now.  :)

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I've done a lot of debugging

I've done a lot of debugging and found the cause of one of the errors in the demo: the first executable line in the main() function is a call to my A2SimpleIO library's prints() function.  When I replace it with puts(), it works.  Otherwise, the code I added to the stub-loading code that displays the filename returns garbage.  I fixed the prints() function's declaration to __cdecl__ and get different garbage.  So, the prints() function is causing the problem.  I'm wondering if it's a disagreement in the stack offset.  I can simply leave it as puts() but really want to use A2SimpleIO.  The version of A2SimpleIO online is utdated, so I will attach the code for prints() here:

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;Print a string of no more than 256 bytes using the kernal.;As the routine is __fastcall__, the pointer already is in .X.A..proc _prints    sta    ptr1        ;Store pointer.    stx    ptr1+1    ldy    #0        ;Start at offset 0.@a:    lda    (ptr1),y    ;Load current char.    beq    @exit        ;Exit if null/EOS.    ;phy    jsr    _printc        ;Print.    ;ply    iny            ;Advance until end of 256 bytes.    bne    @a@exit:    rts.endproc

 

;Address of kernal output routine for direct calls.  The character is;already in .A._printc:;=COUT    ;pha    ;lda    #$FF    ;sta    $32    ;plaBIT    $C082    ora    #$80    jsr    COUT    bit    $C080    rts

--------------------

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I am able to get around the

I am able to get around the bug.  I just have to warn users to not use A2SimpleIO functions before loading a stub into low memory via my Cubbyhole technique, that's all.

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I solved the bug: I forgot to

I solved the bug: I forgot to initialize Aux memory.  I needed to disable the RAM drive to make Aux RAM usable.  :)

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