mirror of https://github.com/cc65/cc65.git
Added C64 Turbo Master accelerator code and documentation.
This commit is contained in:
Marco van den Heuvel
parent
5c07db3a74
commit
ad7b339c44
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@ -69,3 +69,12 @@ C65_VICIII_CTRL_B := $D031
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C65_VICIII_UNLOCK_1 = $A5
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C65_VICIII_UNLOCK_2 = $96
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; ---------------------------------------------------------------------------
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; C64 Turbo Master cartridge
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TURBOMASTER_DETECT := $BF53
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TURBOMASTER_SPEED_REG := $00
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@ -180,16 +180,19 @@ url="funcref.html" name="function reference"> for declaration and usage.
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<item>detect_c65
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<item>detect_chameleon
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<item>detect_scpu
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<item>detect_turbomaster
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<item>get_c128_speed
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<item>get_c64dtv_speed
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<item>get_c65_speed
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<item>get_chameleon_speed
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<item>get_scpu_speed
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<item>get_turbomaster_speed
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<item>set_c128_speed
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<item>set_c64dtv_speed
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<item>set_c65_speed
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<item>set_chameleon_speed
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<item>set_scpu_speed
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<item>set_turbomaster_speed
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</itemize>
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@ -73,16 +73,19 @@ function.
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<item><ref id="detect_c65" name="detect_c65">
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<item><ref id="detect_chameleon" name="detect_chameleon">
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<item><ref id="detect_scpu" name="detect_scpu">
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<item><ref id="detect_turbomaster" name="detect_turbomaster">
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<item><ref id="get_c128_speed" name="get_c128_speed">
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<item><ref id="get_c64dtv_speed" name="get_c64dtv_speed">
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<item><ref id="get_c65_speed" name="get_c65_speed">
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<item><ref id="get_chameleon_speed" name="get_chameleon_speed">
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<item><ref id="get_scpu_speed" name="get_scpu_speed">
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<item><ref id="get_turbomaster_speed" name="get_turbomaster_speed">
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<item><ref id="set_c128_speed" name="set_c128_speed">
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<item><ref id="set_c64dtv_speed" name="set_c64dtv_speed">
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<item><ref id="set_c65_speed" name="set_c65_speed">
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<item><ref id="set_chameleon_speed" name="set_chameleon_speed">
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<item><ref id="set_scpu_speed" name="set_scpu_speed">
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<item><ref id="set_turbomaster_speed" name="set_turbomaster_speed">
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</itemize>
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@ -3032,6 +3035,26 @@ used in presence of a prototype.
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</quote>
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<sect1>detect_turbomaster<label id="detect_turbomaster"><p>
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<quote>
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<descrip>
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<tag/Function/Check for the presence of the C64 Turbo Master cartridge.
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<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
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<tag/Declaration/<tt/unsigned char detect_turbomaster (void);/
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<tag/Description/The function returns a 1 if a C64 Turbo Master cartridge has been detected.
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<tag/Notes/<itemize>
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<item>The function is specific to the C64.
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</itemize>
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<tag/Availability/cc65 (not all platforms)
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<tag/See also/
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<ref id="get_turbomaster_speed" name="get_turbomaster_speed">,
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<ref id="set_turbomaster_speed" name="set_turbomaster_speed">,
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>div<label id="div"><p>
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<quote>
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@ -3659,6 +3682,28 @@ header files define constants that can be used to check the return code.
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</quote>
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<sect1>get_turbomaster_speed<label id="get_turbomaster_speed"><p>
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<quote>
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<descrip>
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<tag/Function/Get the current speed of the C64 Turbo Master cartridge.
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<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
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<tag/Declaration/<tt/unsigned char get_turbomaster_speed (void);/
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<tag/Description/The function returns the current speed of the C64 Turbo Master cartridge.
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<tag/Notes/<itemize>
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<item>The function is specific to the C64.
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<item>The function does not check for the presence of the C64 Turbo master cartridge.
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<item>See the accelerator.h header for the speed definitions.
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</itemize>
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<tag/Availability/cc65 (not all platforms)
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<tag/See also/
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<ref id="detect_turbomaster" name="detect_turbomaster">,
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<ref id="set_turbomaster_speed" name="set_turbomaster_speed">,
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>get_scpu_speed<label id="get_scpu_speed"><p>
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<quote>
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@ -6320,6 +6365,28 @@ clean-up when exitting the program.
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</quote>
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<sect1>set_turbomaster_speed<label id="set_turbomaster_speed"><p>
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<quote>
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<descrip>
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<tag/Function/Set the current speed of the C64 Turbo Master cartridge.
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<tag/Header/<tt/<ref id="accelerator.h" name="accelerator.h">/
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<tag/Declaration/<tt/unsigned char __fastcall__ set_turbomaster_speed (unsigned char speed);/
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<tag/Description/The function returns the speed after trying to set the speed of the C64 Turbo Master cartridge.
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<tag/Notes/<itemize>
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<item>The function is specific to the C64.
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<item>The function does not check for the presence of the C64 Turbo Master cartridge.
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<item>See the accelerator.h header for the speed definitions.
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</itemize>
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<tag/Availability/cc65 (not all platforms)
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<tag/See also/
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<ref id="detect_turbomaster" name="detect_turbomaster">,
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<ref id="get_turbomaster_speed" name="get_turbomaster_speed">,
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<tag/Example/None.
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</descrip>
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</quote>
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<sect1>set_scpu_speed<label id="set_scpu_speed"><p>
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<quote>
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@ -263,6 +263,47 @@ unsigned char detect_c65 (void);
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* 0x00 : C65/C64DX in C64 mode not present
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* 0x01 : C65/C64DX in C64 mode present
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*/
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/* C64 Turbo Master cartridge */
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unsigned char __fastcall__ set_turbomaster_speed (unsigned char speed);
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/* Set the speed of the Turbo Master cartridge, using SPEED_SLOW will switch to
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* 1 Mhz mode, SPEED_4X or SPEED_FAST will switch to 4 Mhz mode.
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*
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* Note that any value higher or equal to SPEED_4X will switch to 4 Mhz mode,
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* any value lower than SPEED_4X will switch to 1 Mhz mode.
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*
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* This function will return the actual speed the CPU is at after trying
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* to set the requested speed, if the speed is different it might indicate
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* that the hardware switch has locked the speed.
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*
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* This function does not check for the presence of a Turbo Master cartridge,
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* make sure you use 'detect_turbomaster();' before using.
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*/
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unsigned char get_turbomaster_speed (void);
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/* Get the speed of the Turbo Master cartridge.
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*
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* Possible return values:
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* SPEED_SLOW : 1 Mhz mode
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* SPEED_4X : 4 Mhz mode
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*
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* This function does not check for the presence of a Turbo Master cartridge,
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* make sure you use 'detect_turbomaster();' before using.
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*/
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unsigned char detect_turbomaster (void);
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/* Check for the presence of a C64 Turbo Master cartridge.
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*
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* Possible return values:
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* 0x00 : C64 Turbo Master cartridge not present
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* 0x01 : C64 Turbo Master cartridge present
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*/
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/* End of accelerator.h */
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#endif
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@ -0,0 +1,47 @@
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;
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; Marco van den Heuvel, 2018-04-30
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;
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; unsigned char detect_turbomaster (void);
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;
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;/* Check for the presence of a Turbo Master cartridge.
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; *
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; * Possible return values:
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; * 0x00 : TurboMaster cartridge not present
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; * 0x01 : TurboMaster cartridge present
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; */
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.export _detect_turbomaster
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.include "accelerator.inc"
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_detect_turbomaster:
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lda #$00
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tax
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; Make sure the current CPU is not a 6510
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.byte $1A ; NOP on 8502, INA on 65(S)C(E)02, 4510 and 65816
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beq not_found
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; Make sure the current CPU is not a 65816
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clc
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.byte $E2,$01 ; NOP #$01 on 65(S)C02, LDA $(01,S),Y on 65CE02 and 4510, SEP #$01 on 65816
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bcs not_found ; carry will be set on 65816
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; Make sure the current CPU is not a 65CE02/4510
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.byte $A3,$A3 ; NOP NOP on 65(S)C02 and LDZ #$00 on 65CE02 and 4510
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.byte $6B ; NOP on 65(S)C02 and TZA on 65CE02 and 4510
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cmp #$A3
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beq not_found
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; Check for turbo master basic replacement
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ldy TURBOMASTER_DETECT
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cpy #$A2
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bne not_found
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found:
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lda #$01
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.byte $24
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not_found:
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txa
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rts
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@ -0,0 +1,63 @@
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;
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; Marco van den Heuvel, 2018-04-30
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;
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; unsigned char __fastcall__ set_turbomaster_speed (unsigned char speed);
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;
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;/* Set the speed of the Turbo Master cartridge, using SPEED_SLOW will switch to
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; * 1 Mhz mode, SPEED_4X or SPEED_FAST will switch to 4 Mhz mode.
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; *
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; * Note that any value higher or equal to SPEED_4X will switch to 4 Mhz mode,
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; * any value lower than SPEED_4X will switch to 1 Mhz mode.
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; *
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; * This function will return the actual speed the CPU is at after trying
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; * to set the requested speed, if the speed is different it might indicate
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; * that the hardware switch has locked the speed.
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; *
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; * This function does not check for the presence of a Turbo Master cartridge,
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; * make sure you use 'detect_turbomaster();' before using.
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; */
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; unsigned char get_turbomaster_speed (void);
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;
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;/* Get the speed of the Turbo Master cartridge.
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; *
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; * Possible return values:
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; * SPEED_SLOW : 1 Mhz mode
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; * SPEED_4X : 4 Mhz mode
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; *
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; * This function does not check for the presence of a Turbo Master cartridge,
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; * make sure you use 'detect_turbomaster();' before using.
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; */
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.export _set_turbomaster_speed
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.export _get_turbomaster_speed
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.include "accelerator.inc"
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_set_turbomaster_speed:
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tay
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lda TURBOMASTER_SPEED_REG
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cpy #SPEED_4X
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bcs high_speed
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low_speed:
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and #$7F
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store_speed:
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sta TURBOMASTER_SPEED_REG
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jmp _get_turbomaster_speed
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high_speed:
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ora #$80
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bne store_speed
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_get_turbomaster_speed:
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ldx #$00
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lda TURBOMASTER_SPEED_REG
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and #$80
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beq is_slow_speed
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is_high_speed:
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lda #SPEED_4X
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is_slow_speed:
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rts
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@ -2,7 +2,7 @@ CL ?= cl65
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all: c64-scpu-test.prg c128-scpu-test.prg c64dtv-test.prg \
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c64-c128-test.prg c128-test.prg chameleon-test.prg \
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c65-test.prg
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c65-test.prg turbomaster-test.prg
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c64-scpu-test.prg: c64-c128-scpu-test.c
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$(CL) -t c64 c64-c128-scpu-test.c -o c64-scpu-test.prg
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@ -24,3 +24,6 @@ chameleon-test.prg: chameleon-test.c
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c65-test.prg: c65-test.c
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$(CL) -t c64 c65-test.c -o c65-test.prg
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turbomaster-test.prg: turbomaster-test.c
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$(CL) -t c64 turbomaster-test.c -o turbomaster-test.prg
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