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Added 'sim6502' and 'sim65C02' targets.

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The targets allow to run cc65 programs in the sim65 exection
einvironment. As there are no "real" i/o facilities there's no
need for header files. Paravirtualized entry points are mapped
to $FFF0 ff. There's a large cc65 progam area from $0200-$FFEF.

The binary format includes a one-byte header indicating the required
execution environment: The value 0 means 6502 and the value 1
means 65C02. The load adress for the binary is fixed to $0200.

Note: Running sim65C02 programs currently doesn't work bcause
sim65 doesn't actually implement 65C02 opcodes.
This commit is contained in:
Oliver Schmidt 2013-05-20 20:35:42 +02:00
parent 3a028fb621
commit 55f9e6ac25
13 changed files with 331 additions and 1 deletions
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35
cfg/sim6502.cfg Normal file
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@ -0,0 +1,35 @@
SYMBOLS {
__EXEHDR__: type = import;
__STACKSIZE__: type = weak, value = $0800; # 2k stack
}
MEMORY {
ZP: file = "", start = $0000, size = $001A;
HEADER: file = %O, start = $0000, size = $0001;
RAM: file = %O, define = yes, start = $0200, size = $FDF0 - __STACKSIZE__;
}
SEGMENTS {
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro;
LOWCODE: load = RAM, type = ro, optional = yes;
INIT: load = RAM, type = ro, define = yes, optional = yes;
CODE: load = RAM, type = ro;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
}
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__;
}

35
cfg/sim65c02.cfg Normal file
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@ -0,0 +1,35 @@
SYMBOLS {
__EXEHDR__: type = import;
__STACKSIZE__: type = weak, value = $0800; # 2k stack
}
MEMORY {
ZP: file = "", start = $0000, size = $001A;
HEADER: file = %O, start = $0000, size = $0001;
RAM: file = %O, define = yes, start = $0200, size = $FDF0 - __STACKSIZE__;
}
SEGMENTS {
EXEHDR: load = HEADER, type = ro;
STARTUP: load = RAM, type = ro;
LOWCODE: load = RAM, type = ro, optional = yes;
INIT: load = RAM, type = ro, define = yes, optional = yes;
CODE: load = RAM, type = ro;
RODATA: load = RAM, type = ro;
DATA: load = RAM, type = rw;
BSS: load = RAM, type = bss, define = yes;
ZEROPAGE: load = ZP, type = zp;
}
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__;
}

4
libsrc/Makefile
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@ -18,6 +18,8 @@ TARGETS = apple2 \
$(GEOS) \
lynx \
nes \
sim6502 \
sim65c02 \
supervision
DRVTYPES = emd \
@ -94,6 +96,8 @@ ifeq ($(TARGET),apple2enh)
OBJPFX = a2
DRVPFX = a2e
SRCDIR = apple2
else ifeq ($(TARGET),sim65c02)
SRCDIR = sim6502
else
SRCDIR = $(TARGET)
endif

2
libsrc/dbg/dbg.c
View File

@ -104,7 +104,7 @@ static char GetKeyUpdate (void);
#endif
/* Replacement key definitions */
#if defined(__APPLE2__) || defined(__LYNX__) || defined(__SUPERVISION__)
#if defined(__APPLE2__) || defined(__LYNX__) || defined(__SIM6502__) || defined (__SIM65C02__) || defined(__SUPERVISION__)
# define CH_DEL ('H' - 'A' + 1) /* Ctrl+H */
#endif

32
libsrc/sim6502/crt0.s Normal file
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@ -0,0 +1,32 @@
;
; Oliver Schmidt, 2013-05-16
;
; Startup code for cc65 (sim6502 version)
;
.export _exit
.export __STARTUP__ : absolute = 1 ; Mark as startup
.import zerobss, callmain
.import initlib, donelib
.import exit
.import __RAM_START__, __RAM_SIZE__ ; Linker generated
.import __STACKSIZE__ ; Linker generated
.include "zeropage.inc"
.segment "STARTUP"
cld
ldx #$FF
txs
lda #<(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
ldx #>(__RAM_START__ + __RAM_SIZE__ + __STACKSIZE__)
sta sp
stx sp+1
jsr zerobss
jsr initlib
jsr callmain
_exit: pha
jsr donelib
pla
jsr exit

159
libsrc/sim6502/ctype.s Normal file
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@ -0,0 +1,159 @@
;
; Ullrich von Bassewitz, 2003-10-10
;
; Character specification table.
;
.include "ctype.inc"
; The tables are readonly, put them into the rodata segment
.rodata
; The following 256 byte wide table specifies attributes for the isxxx type
; of functions. Doing it by a table means some overhead in space, but it
; has major advantages:
;
; * It is fast. If it weren't for the slow parameter passing of cc65, one
; could even define macros for the isxxx functions (this is usually
; done on other platforms).
;
; * It is highly portable. The only unportable part is the table itself,
; all real code goes into the common library.
;
; * We save some code in the isxxx functions.
__ctype:
.byte CT_CTRL ; 0/00 ___ctrl_@___
.byte CT_CTRL ; 1/01 ___ctrl_A___
.byte CT_CTRL ; 2/02 ___ctrl_B___
.byte CT_CTRL ; 3/03 ___ctrl_C___
.byte CT_CTRL ; 4/04 ___ctrl_D___
.byte CT_CTRL ; 5/05 ___ctrl_E___
.byte CT_CTRL ; 6/06 ___ctrl_F___
.byte CT_CTRL ; 7/07 ___ctrl_G___
.byte CT_CTRL ; 8/08 ___ctrl_H___
.byte CT_CTRL | CT_OTHER_WS | CT_SPACE_TAB
; 9/09 ___ctrl_I___
.byte CT_CTRL | CT_OTHER_WS ; 10/0a ___ctrl_J___
.byte CT_CTRL | CT_OTHER_WS ; 11/0b ___ctrl_K___
.byte CT_CTRL | CT_OTHER_WS ; 12/0c ___ctrl_L___
.byte CT_CTRL | CT_OTHER_WS ; 13/0d ___ctrl_M___
.byte CT_CTRL ; 14/0e ___ctrl_N___
.byte CT_CTRL ; 15/0f ___ctrl_O___
.byte CT_CTRL ; 16/10 ___ctrl_P___
.byte CT_CTRL ; 17/11 ___ctrl_Q___
.byte CT_CTRL ; 18/12 ___ctrl_R___
.byte CT_CTRL ; 19/13 ___ctrl_S___
.byte CT_CTRL ; 20/14 ___ctrl_T___
.byte CT_CTRL ; 21/15 ___ctrl_U___
.byte CT_CTRL ; 22/16 ___ctrl_V___
.byte CT_CTRL ; 23/17 ___ctrl_W___
.byte CT_CTRL ; 24/18 ___ctrl_X___
.byte CT_CTRL ; 25/19 ___ctrl_Y___
.byte CT_CTRL ; 26/1a ___ctrl_Z___
.byte CT_CTRL ; 27/1b ___ctrl_[___
.byte CT_CTRL ; 28/1c ___ctrl_\___
.byte CT_CTRL ; 29/1d ___ctrl_]___
.byte CT_CTRL ; 30/1e ___ctrl_^___
.byte CT_CTRL ; 31/1f ___ctrl_____
.byte CT_SPACE | CT_SPACE_TAB ; 32/20 ___SPACE___
.byte CT_NONE ; 33/21 _____!_____
.byte CT_NONE ; 34/22 _____"_____
.byte CT_NONE ; 35/23 _____#_____
.byte CT_NONE ; 36/24 _____$_____
.byte CT_NONE ; 37/25 _____%_____
.byte CT_NONE ; 38/26 _____&_____
.byte CT_NONE ; 39/27 _____'_____
.byte CT_NONE ; 40/28 _____(_____
.byte CT_NONE ; 41/29 _____)_____
.byte CT_NONE ; 42/2a _____*_____
.byte CT_NONE ; 43/2b _____+_____
.byte CT_NONE ; 44/2c _____,_____
.byte CT_NONE ; 45/2d _____-_____
.byte CT_NONE ; 46/2e _____._____
.byte CT_NONE ; 47/2f _____/_____
.byte CT_DIGIT | CT_XDIGIT ; 48/30 _____0_____
.byte CT_DIGIT | CT_XDIGIT ; 49/31 _____1_____
.byte CT_DIGIT | CT_XDIGIT ; 50/32 _____2_____
.byte CT_DIGIT | CT_XDIGIT ; 51/33 _____3_____
.byte CT_DIGIT | CT_XDIGIT ; 52/34 _____4_____
.byte CT_DIGIT | CT_XDIGIT ; 53/35 _____5_____
.byte CT_DIGIT | CT_XDIGIT ; 54/36 _____6_____
.byte CT_DIGIT | CT_XDIGIT ; 55/37 _____7_____
.byte CT_DIGIT | CT_XDIGIT ; 56/38 _____8_____
.byte CT_DIGIT | CT_XDIGIT ; 57/39 _____9_____
.byte CT_NONE ; 58/3a _____:_____
.byte CT_NONE ; 59/3b _____;_____
.byte CT_NONE ; 60/3c _____<_____
.byte CT_NONE ; 61/3d _____=_____
.byte CT_NONE ; 62/3e _____>_____
.byte CT_NONE ; 63/3f _____?_____
.byte CT_NONE ; 64/40 _____@_____
.byte CT_UPPER | CT_XDIGIT ; 65/41 _____A_____
.byte CT_UPPER | CT_XDIGIT ; 66/42 _____B_____
.byte CT_UPPER | CT_XDIGIT ; 67/43 _____C_____
.byte CT_UPPER | CT_XDIGIT ; 68/44 _____D_____
.byte CT_UPPER | CT_XDIGIT ; 69/45 _____E_____
.byte CT_UPPER | CT_XDIGIT ; 70/46 _____F_____
.byte CT_UPPER ; 71/47 _____G_____
.byte CT_UPPER ; 72/48 _____H_____
.byte CT_UPPER ; 73/49 _____I_____
.byte CT_UPPER ; 74/4a _____J_____
.byte CT_UPPER ; 75/4b _____K_____
.byte CT_UPPER ; 76/4c _____L_____
.byte CT_UPPER ; 77/4d _____M_____
.byte CT_UPPER ; 78/4e _____N_____
.byte CT_UPPER ; 79/4f _____O_____
.byte CT_UPPER ; 80/50 _____P_____
.byte CT_UPPER ; 81/51 _____Q_____
.byte CT_UPPER ; 82/52 _____R_____
.byte CT_UPPER ; 83/53 _____S_____
.byte CT_UPPER ; 84/54 _____T_____
.byte CT_UPPER ; 85/55 _____U_____
.byte CT_UPPER ; 86/56 _____V_____
.byte CT_UPPER ; 87/57 _____W_____
.byte CT_UPPER ; 88/58 _____X_____
.byte CT_UPPER ; 89/59 _____Y_____
.byte CT_UPPER ; 90/5a _____Z_____
.byte CT_NONE ; 91/5b _____[_____
.byte CT_NONE ; 92/5c _____\_____
.byte CT_NONE ; 93/5d _____]_____
.byte CT_NONE ; 94/5e _____^_____
.byte CT_NONE ; 95/5f _UNDERLINE_
.byte CT_NONE ; 96/60 ___grave___
.byte CT_LOWER | CT_XDIGIT ; 97/61 _____a_____
.byte CT_LOWER | CT_XDIGIT ; 98/62 _____b_____
.byte CT_LOWER | CT_XDIGIT ; 99/63 _____c_____
.byte CT_LOWER | CT_XDIGIT ; 100/64 _____d_____
.byte CT_LOWER | CT_XDIGIT ; 101/65 _____e_____
.byte CT_LOWER | CT_XDIGIT ; 102/66 _____f_____
.byte CT_LOWER ; 103/67 _____g_____
.byte CT_LOWER ; 104/68 _____h_____
.byte CT_LOWER ; 105/69 _____i_____
.byte CT_LOWER ; 106/6a _____j_____
.byte CT_LOWER ; 107/6b _____k_____
.byte CT_LOWER ; 108/6c _____l_____
.byte CT_LOWER ; 109/6d _____m_____
.byte CT_LOWER ; 110/6e _____n_____
.byte CT_LOWER ; 111/6f _____o_____
.byte CT_LOWER ; 112/70 _____p_____
.byte CT_LOWER ; 113/71 _____q_____
.byte CT_LOWER ; 114/72 _____r_____
.byte CT_LOWER ; 115/73 _____s_____
.byte CT_LOWER ; 116/74 _____t_____
.byte CT_LOWER ; 117/75 _____u_____
.byte CT_LOWER ; 118/76 _____v_____
.byte CT_LOWER ; 119/77 _____w_____
.byte CT_LOWER ; 120/78 _____x_____
.byte CT_LOWER ; 121/79 _____y_____
.byte CT_LOWER ; 122/7a _____z_____
.byte CT_NONE ; 123/7b _____{_____
.byte CT_NONE ; 124/7c _____|_____
.byte CT_NONE ; 125/7d _____}_____
.byte CT_NONE ; 126/7e _____~_____
.byte CT_OTHER_WS ; 127/7f ____DEL____
.res 128, CT_NONE ; 128-255

14
libsrc/sim6502/errno.s Normal file
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@ -0,0 +1,14 @@
;
; Oliver Schmidt, 2013-05-16
;
; extern int errno;
;
.include "errno.inc"
; ------------------------------------------------------------------------
.bss
__errno:
.word 0

13
libsrc/sim6502/exehdr.s Normal file
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@ -0,0 +1,13 @@
;
; Oliver Schmidt, 2013-05-16
;
; This module supplies a 1 byte header identifying the simulator type
;
.export __EXEHDR__ : absolute = 1 ; Linker referenced
; ------------------------------------------------------------------------
.segment "EXEHDR"
.byte .defined(__SIM65C02__)

16
libsrc/sim6502/paravirt.s Normal file
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@ -0,0 +1,16 @@
;
; Oliver Schmidt, 2013-05-16
;
; int open (const char* name, int flags, ...);
; int __fastcall__ close (int fd);
; int __fastcall__ read (int fd, void* buf, unsigned count);
; int __fastcall__ write (int fd, const void* buf, unsigned count);
;
.export exit, _open, _close, _read, _write
exit := $FFF0
_open := $FFF1
_close := $FFF2
_read := $FFF3
_write := $FFF4

8
src/ca65/main.c
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@ -283,6 +283,14 @@ static void SetSys (const char* Sys)
NewSymbol ("__LYNX__", 1);
break;
case TGT_SIM6502:
NewSymbol ("__SIM6502__", 1);
break;
case TGT_SIM65C02:
NewSymbol ("__SIM65C02__", 1);
break;
default:
AbEnd ("Invalid target name: `%s'", Sys);

8
src/cc65/main.c
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@ -239,6 +239,14 @@ static void SetSys (const char* Sys)
DefineNumericMacro ("__LYNX__", 1);
break;
case TGT_SIM6502:
DefineNumericMacro ("__SIM6502__", 1);
break;
case TGT_SIM65C02:
DefineNumericMacro ("__SIM65C02__", 1);
break;
default:
AbEnd ("Unknown target system type %d", Target);
}

4
src/common/target.c
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@ -142,6 +142,8 @@ static const TargetEntry TargetMap[] = {
{ "none", TGT_NONE },
{ "pet", TGT_PET },
{ "plus4", TGT_PLUS4 },
{ "sim6502", TGT_SIM6502 },
{ "sim65c02", TGT_SIM65C02 },
{ "supervision", TGT_SUPERVISION },
{ "vc20", TGT_VIC20 },
{ "vic20", TGT_VIC20 },
@ -172,6 +174,8 @@ static const TargetProperties PropertyTable[TGT_COUNT] = {
{ "nes", CPU_6502, BINFMT_BINARY, CTNone },
{ "supervision", CPU_65SC02, BINFMT_BINARY, CTNone },
{ "lynx", CPU_65C02, BINFMT_BINARY, CTNone },
{ "sim6502", CPU_6502, BINFMT_BINARY, CTNone },
{ "sim65c02", CPU_65C02, BINFMT_BINARY, CTNone },
};
/* Target system */

2
src/common/target.h
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@ -73,6 +73,8 @@ typedef enum {
TGT_NES,
TGT_SUPERVISION,
TGT_LYNX,
TGT_SIM6502,
TGT_SIM65C02,
TGT_COUNT /* Number of target systems */
} target_t;