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Test trial for interrupts

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This commit is contained in:
Alexander Noack
2020-04-12 00:47:05 +02:00
parent 67ef5744f0
commit 273163015c
2 changed files with 96 additions and 10 deletions
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11
src/example/char_int.asm
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@@ -1,20 +1,11 @@
;;Query the keyboard in an interrupt routine.
ORG 38H ;Assemble into the interrupt routine
DI ;Disable interrupts
EX AF,AF' ;Save the state of the AF register
EXX ;Save the state of any other registers
CALL INTR ;Call the interrupt handler
EXX ;Restore the state of each register
EX AF,AF' ;Restore the accumulator
EI ;Enable the interrupts
RET ;Return to caller
ORG 100H ;Tell the assembler to start at addr 0x100
START: IM 1 ;Set interrupt mode 1
LD HL,GREET ;Load the start address of the banner
LD B,15H ;Set the length of the banner text
LD DE,0H ;Start output in the top left corner
CALL 84CDH ;Call str_out
;; TODO: Add code
HALT ;Halts the CPU to save batteries.
RET ;End the program
INTR: IN A,(16H) ;Read the interrupt register
AND 1H ;Check if this is a keyboard interrupt

95
src/test/int_tab.asm Normal file
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@@ -0,0 +1,95 @@
;;Tests all interrupt vectors to find which interrupt value is used querying the Keyboard in IM2
ORG 100H ;Tell the assembler to start at addr 0x100
START: IM 2 ;Set interrupt mode 2
LD HL,GREET ;Load the start addr. of the banner
LD B,16H ;Set the length of the banner text
LD DE,0H ;Place curser in the top left
CALL 84CDH ;Call system str_out
LOOP: HALT ;Halt the CPU and wait for interrupts
JR LOOP ;Stay in the loop
RET ;Return to original caller
INTTBL: DW INTHD0 ;Define the address of the first interrupt handler
DW INTHD1 ;Define the address of the second interrupt handler
DW INTHD2 ;Define the address of the third interrupt handler
DW INTHD3 ;Define the address of the fourth interrupt handler
DW INTHD4 ;Define the address of the fifths interrupt handler
DW INTHD5 ;Define the address of the sixths interrupt handler
DW INTHD6 ;Define the address of the seventh interrupt handler
DW INTHD7 ;Define the address of the eighth interrupt handler
INTHD0: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,30H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD1: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,31H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD2: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,32H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD3: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,33H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD4: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,34H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD5: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,35H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD6: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,36H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHD7: DI ;Disable interrupts
EX AF,AF' ;Push AF to the shadow register
EXX ;Push all other registers to the shadow register
LD A,37H ;Load handler id to A
CALL INTHDL ;Call the interrupt handler method.
EXX ;Restore the registers
EX AF,AF' ;Retore AF
EI ;Reenable interrupts
RETI ;Return from interrupt
INTHDL: LD DE,100H ;Put char in row 2 col. 1
CALL 8468H ;Calls the char_out function
RET ;Return to the interrupt handler
GREET: DB 'Test for keyboard int.'
END