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mockingboard: add interrupt test code
This commit is contained in:
Vince Weaver
parent
bd1e2a1ffe
commit
e591dc84ea
@ -6,10 +6,11 @@ PNG2GR = ../gr-utils/png2gr
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all: dump_ed mock.dsk lzss_compress
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mock.dsk: KSP_THEME_UNCOMPRESSED KSP_THEME_COMPRESSED \
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KSP_THEME_INTERRUPT
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KSP_THEME_INTERRUPT INTERRUPT_TEST
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$(DOS33) -y mock_test.dsk BSAVE -a 0x1000 KSP_THEME_UNCOMPRESSED
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$(DOS33) -y mock_test.dsk BSAVE -a 0x1000 KSP_THEME_COMPRESSED
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$(DOS33) -y mock_test.dsk BSAVE -a 0x1000 KSP_THEME_INTERRUPT
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$(DOS33) -y mock_test.dsk BSAVE -a 0x1000 INTERRUPT_TEST
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KSP_THEME_COMPRESSED: ksp_theme_compressed.o
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ld65 -o KSP_THEME_COMPRESSED ksp_theme_compressed.o -C ./apple2_1000.inc
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@ -35,6 +36,16 @@ ksp_theme_uncompressed.o: ksp_theme_uncompressed.s \
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../asm_routines/mockingboard.s
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ca65 -o ksp_theme_uncompressed.o ksp_theme_uncompressed.s -l ksp_theme_uncompressed.lst
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INTERRUPT_TEST: interrupt_test.o
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ld65 -o INTERRUPT_TEST interrupt_test.o -C ./apple2_1000.inc
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interrupt_test.o: interrupt_test.s \
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../asm_routines/mockingboard.s
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ca65 -o interrupt_test.o interrupt_test.s -l interrupt_test.lst
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ED: duet.o
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ld65 -o ED duet.o -C ./apple2_900.inc
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@ -58,5 +69,6 @@ lzss_compress: lzss_compress.o
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$(CC) $(LFLAGS) -o lzss_compress lzss_compress.o
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clean:
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rm -f *~ TITLE.GR *.o *.lst ED KSP_THEME_UNCOMPRESSED dump_ed
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rm -f *~ TITLE.GR *.o *.lst ED KSP_THEME_UNCOMPRESSED \
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KSP_THEME_COMPRESSED KSP_THEME_INTERRUPT INTERRUPT_TEST dump_ed
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129
mockingboard/interrupt_test.s
Normal file
129
mockingboard/interrupt_test.s
Normal file
@ -0,0 +1,129 @@
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; Test the 6522 on a Mockingboard running in interrupt mode
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; Trying to set it to 50Hz
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.include "zp.inc"
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;=============================
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; Print message
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;=============================
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jsr HOME
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jsr TEXT
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lda #0
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sta DRAW_PAGE
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sta CH
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sta CV
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lda #<mocking_message
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sta OUTL
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lda #>mocking_message
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sta OUTH
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jsr move_and_print
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jsr mockingboard_detect_slot4
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cpx #$1
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beq mockingboard_found
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lda #<not_message
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sta OUTL
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lda #>not_message
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sta OUTH
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inc CV
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jsr move_and_print
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jmp forever_loop
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mockingboard_found:
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lda #<found_message
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sta OUTL
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lda #>found_message
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sta OUTH
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inc CV
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jsr move_and_print
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;=========================
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; Setup Interrupt Handler
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;=========================
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; Vector address goes to 0x3fe/0x3ff
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; FIXME: should chain any existing handler
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lda #<interrupt_handler
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sta $03fe
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lda #>interrupt_handler
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sta $03ff
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;============================
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; Enable 50Hz clock on 6522
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;============================
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lda #$40 ; Generate continuous interrupts, don't touch PB7
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sta $C40B ; ACR register
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lda #$7F ; clear all interrupt flags
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sta $C40E ; IER register (interrupt enable)
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lda #$C0
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sta $C40D ; IFR: 1100, enable interrupt on timer one oflow
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sta $C40E ; IER: 1100, enable timer one interrupt
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lda #$E7
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sta $C404 ; write into low-order latch
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lda #$4f
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sta $C405 ; write into high-order latch,
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; load both values into counter
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; clear interrupt and start counting
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; 4fe7 / 1e6 = .020s, 50Hz
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;============================
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; Enable 6502 interrupts
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;============================
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;
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cli ; clear interrupt mask
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;============================
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; Loop forever
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;============================
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lda #64
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forever_loop:
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; clc
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; adc #1
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sta $0401
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jmp forever_loop
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;=============================
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; simple interrupt handler
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;=============================
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interrupt_handler:
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lda $45 ; the Apple II firmware messes with A when
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; detecting BRK, so the value in $45 is the real one?
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; also DISK II support uses this so you should disable
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; interrupts if messing with the disk?
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pha ; save A (hardware saved Pflags for us)
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bit $C404 ; can clear interrupt by reading T1C-L
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inc $0410 ; increment text char on screen
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pla ; restore A
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rti
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;=========
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;routines
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;=========
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.include "../asm_routines/gr_offsets.s"
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.include "../asm_routines/text_print.s"
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.include "../asm_routines/mockingboard.s"
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;=========
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; strings
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;=========
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mocking_message: .asciiz "LOOKING FOR MOCKINGBOARD IN SLOT #4"
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not_message: .byte "NOT "
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found_message: .asciiz "FOUND"
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done_message: .asciiz "DONE PLAYING"
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@ -34,14 +34,12 @@
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jmp forever_loop
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mockingboard_found:
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lda #<found_message
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sta OUTL
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lda #>found_message
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sta OUTH
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inc CV
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jsr move_and_print
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lda #<found_message
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sta OUTL
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lda #>found_message
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sta OUTH
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inc CV
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jsr move_and_print
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;============================
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; Init the Mockingboard
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@ -63,8 +61,8 @@ mockingboard_found:
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lda #>ksptheme
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sta INH
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ldy #0
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new_frame:
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ldy #0
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lda (INL),Y ; read in frame delay
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cmp #$ff ; see if end
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beq done_play ; if so, done
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@ -72,90 +70,96 @@ new_frame:
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tax
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old_frame:
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dex ; decrement the frame diff
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bpl delay_a_bit ; if not there yet, delay
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beq bottom_regs ; if not there yet, delay
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jsr delay_50Hz
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jmp old_frame
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top_regs:
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bottom_regs:
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iny
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lda (INL),Y ; load low reg bitmask
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ldx #$ff
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top_regs_loop:
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inx
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cmp #$8
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beq bottom_regs
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ror
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bcc top_regs_loop
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lda (INL),Y ; load low reg bitmask
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sta MASK
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ldx #$ff ; init to -1
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bottom_regs_loop:
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inx ; increment X
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cpx #$8 ; if we reach 8, done
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beq top_regs ; move on to top
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stx XX
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sty YY
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ror MASK
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bcc bottom_regs_loop ; if bit not set in mask, skip reg
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iny
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lda (INL),Y ; read in value
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tax
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stx XX ; save X
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ldy XX
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iny ; get next output value
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lda (INL),Y ; read in value
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sty YY ; save Y
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tax ; value in X
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ldy XX ; register# in Y
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; reg in Y, value in X
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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ldx XX ; restore X
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ldy YY ; restore Y
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jmp bottom_regs_loop ; loop
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top_regs:
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iny ; point to next value
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lda (INL),Y ; load top reg bitmask
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sta MASK
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ldx #$7 ; load X as 7 (we increment first)
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top_regs_loop:
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inx ; increment
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cpx #$16
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beq done_with_masks ; exit if done
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ror MASK
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bcc top_regs_loop ; loop if not set
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stx XX ; save X value
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iny ; point to value
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lda (INL),Y ; read in output value
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sty YY ; save Y value
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tax ; value in X
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ldy XX ; register in Y
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; reg in Y, value in X
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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ldx XX
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ldy YY
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jmp top_regs_loop
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bottom_regs:
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done_with_masks:
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iny
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lda (INL),Y ; load low reg bitmask
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ldx #$ff
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bottom_regs_loop:
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inx
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cmp #$8
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beq delay_a_bit
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ror
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bcc bottom_regs_loop
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clc
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tya
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adc INL
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sta INL
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lda #0
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adc INH
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sta INH
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jsr delay_50Hz
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stx XX
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sty YY
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jmp new_frame
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iny
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lda (INL),Y ; read in value
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tax
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ldy XX
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; reg in Y, value in X
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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ldx XX
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ldy YY
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jmp bottom_regs_loop
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; reg in Y, value in X
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jsr write_ay_left ; assume 3 channel (not six)
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jsr write_ay_right ; so write same to both left/write
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delay_a_bit:
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lda #86
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jsr WAIT ; delay 1/2(26+27A+5A^2) us
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; 50Hz = 20ms = 20000us
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; 40000 = 26+27A+5A^2
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; 5a^2+27a-39974 = 0
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; A = 86.75
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jmp old_frame
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done_play:
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jsr clear_ay_left
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jsr clear_ay_right
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lda #0
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sta CH
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lda #2
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lda #3
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sta CV
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lda #<done_message
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sta OUTL
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@ -167,6 +171,19 @@ done_play:
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forever_loop:
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jmp forever_loop
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delay_50Hz:
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lda #86
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jsr WAIT ; delay 1/2(26+27A+5A^2) us
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; 50Hz = 20ms = 20000us
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; 40000 = 26+27A+5A^2
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; 5a^2+27a-39974 = 0
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; A = 86.75
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rts
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;=========
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;routines
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;=========
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@ -182,7 +199,7 @@ forever_loop:
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;=========
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; strings
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;=========
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mocking_message: .asciiz "LOOKING FOR MOCKINGBOARD IN SLOT #4: "
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not_message: .byte "NOT "
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mocking_message: .asciiz "ASSUMING MOCKINGBOARD IN SLOT #4"
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not_message: .byte "NOT "
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found_message: .asciiz "FOUND"
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done_message: .asciiz "DONE PLAYING"
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