mirror of
https://github.com/cc65/cc65.git
synced 2024-11-19 06:31:31 +00:00
Merge pull request #626 from blackystardust/master
Added c64dtv accelerator code and documentation.
This commit is contained in:
Oliver Schmidt
GitHub
commit
305c6e7ae4
@ -32,3 +32,11 @@ SuperCPU_Fast := $D07B
|
||||
SuperCPU_Speed_Mode := $D0B8
|
||||
SuperCPU_Detect := $D0BC
|
||||
|
||||
|
||||
; ---------------------------------------------------------------------------
|
||||
; C64DTV
|
||||
|
||||
C64DTV_Extended_Regs := $D03F
|
||||
|
||||
C64DTV_Slow = $00
|
||||
C64DTV_Fast = $03
|
||||
|
||||
@ -175,9 +175,12 @@ The functions listed below are accelerator functions for the C64. See the <url
|
||||
url="funcref.html" name="function reference"> for declaration and usage.
|
||||
|
||||
<itemize>
|
||||
<item>detect_c64dtv
|
||||
<item>detect_scpu
|
||||
<item>scpu_get_speed
|
||||
<item>scpu_set_speed
|
||||
<item>get_c64dtv_speed
|
||||
<item>get_scpu_speed
|
||||
<item>set_c64dtv_speed
|
||||
<item>set_scpu_speed
|
||||
</itemize>
|
||||
|
||||
|
||||
|
||||
@ -68,8 +68,11 @@ function.
|
||||
<sect1><tt/accelerator.h/<label id="accelerator.h"><p>
|
||||
|
||||
<itemize>
|
||||
<item><ref id="detect_c64dtv" name="detect_c64dtv">
|
||||
<item><ref id="detect_scpu" name="detect_scpu">
|
||||
<item><ref id="get_c64dtv_speed" name="get_c64dtv_speed">
|
||||
<item><ref id="get_scpu_speed" name="get_scpu_speed">
|
||||
<item><ref id="set_c64dtv_speed" name="set_c64dtv_speed">
|
||||
<item><ref id="set_scpu_speed" name="set_scpu_speed">
|
||||
</itemize>
|
||||
|
||||
@ -2920,6 +2923,26 @@ used in presence of a prototype.
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>detect_c64dtv<label id="detect_c64dtv"><p>
|
||||
|
||||
<quote>
|
||||
<descrip>
|
||||
<tag/Function/Check for the presence of the C64DTV.
|
||||
<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
|
||||
<tag/Declaration/<tt/unsigned char detect_c64dtv (void);/
|
||||
<tag/Description/The function returns a 1 if a C64DTV has been detected.
|
||||
<tag/Notes/<itemize>
|
||||
<item>The function is specific to the C64.
|
||||
</itemize>
|
||||
<tag/Availability/cc65 (not all platforms)
|
||||
<tag/See also/
|
||||
<ref id="get_c64dtv_speed" name="get_c64dtv_speed">,
|
||||
<ref id="set_c64dtv_speed" name="set_c64dtv_speed">,
|
||||
<tag/Example/None.
|
||||
</descrip>
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>detect_scpu<label id="detect_scpu"><p>
|
||||
|
||||
<quote>
|
||||
@ -3479,6 +3502,28 @@ header files define constants that can be used to check the return code.
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>get_c64dtv_speed<label id="get_c64dtv_speed"><p>
|
||||
|
||||
<quote>
|
||||
<descrip>
|
||||
<tag/Function/Get the current speed of the C64DTV.
|
||||
<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
|
||||
<tag/Declaration/<tt/unsigned char get_c64dtv_speed (void);/
|
||||
<tag/Description/The function returns the current speed of the C64DTV.
|
||||
<tag/Notes/<itemize>
|
||||
<item>The function is specific to the C64.
|
||||
<item>The function does not check for the presence of the C64DTV.
|
||||
<item>See the accelerator.h header for the speed definitions.
|
||||
</itemize>
|
||||
<tag/Availability/cc65 (not all platforms)
|
||||
<tag/See also/
|
||||
<ref id="detect_c64dtv" name="detect_c64dtv">,
|
||||
<ref id="set_c64dtv_speed" name="set_c64dtv_speed">,
|
||||
<tag/Example/None.
|
||||
</descrip>
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>get_scpu_speed<label id="get_scpu_speed"><p>
|
||||
|
||||
<quote>
|
||||
@ -6052,13 +6097,35 @@ clean-up when exitting the program.
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>set_c64dtv_speed<label id="set_c64dtv_speed"><p>
|
||||
|
||||
<quote>
|
||||
<descrip>
|
||||
<tag/Function/Set the current speed of the C64DTV.
|
||||
<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
|
||||
<tag/Declaration/<tt/unsigned char __fastcall__ set_c64dtv_speed (unsigned char speed);/
|
||||
<tag/Description/The function returns the speed after trying to set the speed of the C64DTV.
|
||||
<tag/Notes/<itemize>
|
||||
<item>The function is specific to the C64.
|
||||
<item>The function does not check for the presence of the C64DTV.
|
||||
<item>See the accelerator.h header for the speed definitions.
|
||||
</itemize>
|
||||
<tag/Availability/cc65 (not all platforms)
|
||||
<tag/See also/
|
||||
<ref id="detect_c64dtv" name="detect_c64dtv">,
|
||||
<ref id="get_c64dtv_speed" name="get_c64dtv_speed">,
|
||||
<tag/Example/None.
|
||||
</descrip>
|
||||
</quote>
|
||||
|
||||
|
||||
<sect1>set_scpu_speed<label id="set_scpu_speed"><p>
|
||||
|
||||
<quote>
|
||||
<descrip>
|
||||
<tag/Function/Set the current speed of the C64/C128 SuperCPU cartridge.
|
||||
<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
|
||||
<tag/Declaration/<tt/unsigned char set_scpu_speed (unsigned char speed);/
|
||||
<tag/Declaration/<tt/unsigned char __fastcall__ set_scpu_speed (unsigned char speed);/
|
||||
<tag/Description/The function returns the speed after trying to set the speed of the SuperCPU cartridge.
|
||||
<tag/Notes/<itemize>
|
||||
<item>The function is specific to the C128 and C64.
|
||||
|
||||
@ -98,5 +98,43 @@ extern unsigned char detect_scpu (void);
|
||||
* 0x01 : SuperCPU cartridge present
|
||||
*/
|
||||
|
||||
|
||||
/* C64DTV */
|
||||
|
||||
extern unsigned char __fastcall__ set_c64dtv_speed (unsigned char speed);
|
||||
|
||||
/* Set the speed of the C64DTV, using SPEED_SLOW will switch to
|
||||
* slow mode, SPEED_2X or SPEED_FAST will switch to fast mode.
|
||||
*
|
||||
* Note that any value higher or equal to SPEED_2X will switch to fast mode.
|
||||
*
|
||||
* This function will return the actual speed the CPU is at after trying
|
||||
* to set the requested speed, to my knowledge the switch should not fail.
|
||||
*
|
||||
* This function does not check for the presence of the C64DTV,
|
||||
* make sure you use 'detect_c64dtv();' before using.
|
||||
*/
|
||||
|
||||
extern unsigned char get_c64dtv_speed (void);
|
||||
|
||||
/* Get the speed of the C64DTV.
|
||||
*
|
||||
* Possible return values:
|
||||
* SPEED_1X : slow mode
|
||||
* SPEED_2X : fast mode
|
||||
*
|
||||
* This function does not check for the presence of the C64DTV,
|
||||
* make sure you use 'detect_c64dtv();' before using.
|
||||
*/
|
||||
|
||||
extern unsigned char detect_c64dtv (void);
|
||||
|
||||
/* Check for the presence of the C64DTV.
|
||||
*
|
||||
* Possible return values:
|
||||
* 0x00 : C64DTV not present
|
||||
* 0x01 : C64DTV present
|
||||
*/
|
||||
|
||||
/* End of accelerator.h */
|
||||
#endif
|
||||
|
||||
64
libsrc/c64/acc_c64dtv_speed.s
Executable file
64
libsrc/c64/acc_c64dtv_speed.s
Executable file
@ -0,0 +1,64 @@
|
||||
;
|
||||
; Marco van den Heuvel, 2018-04-14
|
||||
;
|
||||
|
||||
; extern unsigned char __fastcall__ set_c64dtv_speed (unsigned char speed);
|
||||
;
|
||||
;/* Set the speed of the C64DTV, using SPEED_SLOW will switch to
|
||||
; * slow mode, SPEED_2X or SPEED_FAST will switch to fast mode.
|
||||
; *
|
||||
; * Note that any value higher or equal to SPEED_2X will switch to fast mode.
|
||||
; *
|
||||
; * This function will return the actual speed the CPU is at after trying
|
||||
; * to set the requested speed, to my knowledge the switching should not fail.
|
||||
; *
|
||||
; * This function does not check for the presence of the C64DTV,
|
||||
; * make sure you use 'detect_c64dtv();' before using.
|
||||
; */
|
||||
|
||||
; extern unsigned char get_c64dtv_speed (void);
|
||||
;
|
||||
;/* Get the speed of the C64DTV.
|
||||
; *
|
||||
; * Possible return values:
|
||||
; * SPEED_1X : slow mode
|
||||
; * SPEED_2X : fast mode
|
||||
; *
|
||||
; * This function does not check for the presence of the C64DTV,
|
||||
; * make sure you use 'detect_c64dtv();' before using.
|
||||
; */
|
||||
|
||||
.export _set_c64dtv_speed
|
||||
.export _get_c64dtv_speed
|
||||
|
||||
.include "accelerator.inc"
|
||||
|
||||
_set_c64dtv_speed:
|
||||
cmp #SPEED_2X
|
||||
bcs high_speed
|
||||
low_speed:
|
||||
ldx #C64DTV_Slow
|
||||
set_speed:
|
||||
.byte $32,$99 ; SAC #$99 set accumulator to reg 9 (cpu control)
|
||||
txa ; (re)set skip and burst bits
|
||||
.byte $32,$00 ; SAC #$00 set accumulator back to reg 0
|
||||
jmp _get_c64dtv_speed
|
||||
|
||||
high_speed:
|
||||
ldx #C64DTV_Fast
|
||||
bne set_speed
|
||||
|
||||
|
||||
_get_c64dtv_speed:
|
||||
.byte $32,$99 ; SAC #$99 set accumulator to reg 9 (cpu control)
|
||||
tax
|
||||
.byte $32,$00 ; SAC #$00 set accumulator back to reg 0
|
||||
txa
|
||||
and #C64DTV_Fast
|
||||
bne in_fast_mode
|
||||
lda #$00
|
||||
.byte $2C
|
||||
in_fast_mode:
|
||||
lda #$01
|
||||
ldx #$00
|
||||
rts
|
||||
44
libsrc/c64/acc_detect_c64dtv.s
Executable file
44
libsrc/c64/acc_detect_c64dtv.s
Executable file
@ -0,0 +1,44 @@
|
||||
;
|
||||
; Marco van den Heuvel, 2018-04-14
|
||||
;
|
||||
|
||||
; unsigned char detect_c64dtv (void);
|
||||
;
|
||||
;/* Check for the presence of the C64DTV.
|
||||
; *
|
||||
; * Possible return values:
|
||||
; * 0x00 : C64DTV not present
|
||||
; * 0x01 : C64DTV present
|
||||
; */
|
||||
|
||||
.export _detect_c64dtv
|
||||
|
||||
.include "accelerator.inc"
|
||||
|
||||
_detect_c64dtv:
|
||||
ldy C64DTV_Extended_Regs
|
||||
lda #$00
|
||||
ldx $D000
|
||||
|
||||
; Make sure the CPU is a 6510
|
||||
.byte $1A ; NOP on 8502, INA on 65(S)C(E)02, 4510 and 65816
|
||||
bne not_found
|
||||
lda #$01
|
||||
sta C64DTV_Extended_Regs
|
||||
|
||||
; Check if $D000 is mirrored at $D040
|
||||
cpx $D040
|
||||
bne found
|
||||
inc $D000
|
||||
cpx $D040
|
||||
bne not_found
|
||||
found:
|
||||
lda #$01
|
||||
.byte $2C
|
||||
not_found:
|
||||
lda #$00
|
||||
stx $D000
|
||||
ldx #$00
|
||||
sty C64DTV_Extended_Regs
|
||||
rts
|
||||
|
||||
@ -1,9 +1,13 @@
|
||||
CL ?= cl65
|
||||
|
||||
all: c64-scpu-test.prg c128-scpu-test.prg
|
||||
all: c64-scpu-test.prg c128-scpu-test.prg c64dtv-test.prg
|
||||
|
||||
c64-scpu-test.prg: c64-c128-scpu-test.c
|
||||
$(CL) -t c64 c64-c128-scpu-test.c -o c64-scpu-test.prg
|
||||
|
||||
c128-scpu-test.prg: c64-c128-scpu-test.c
|
||||
$(CL) -t c128 c64-c128-scpu-test.c -o c128-scpu-test.prg
|
||||
|
||||
c64dtv-test.prg: c64dtv-test.c
|
||||
$(CL) -t c64 c64dtv-test.c -o c64dtv-test.prg
|
||||
|
||||
|
||||
8
testcode/lib/accelerator/c64dtv-test.c
Executable file
8
testcode/lib/accelerator/c64dtv-test.c
Executable file
@ -0,0 +1,8 @@
|
||||
/* C64DTV accelerator test code. */
|
||||
|
||||
#define ACC_DETECT detect_c64dtv
|
||||
#define ACC_GET_SPEED get_c64dtv_speed
|
||||
#define ACC_SET_SPEED set_c64dtv_speed
|
||||
#define ACC_NAME "C64DTV"
|
||||
|
||||
#include "turbo-test.c"
|
||||
Loading…
Reference in New Issue
Block a user