| Line 44... |
Line 44... |
; R10 value to clear/reset the PIC
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; R10 value to clear/reset the PIC
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; uR12 = memory
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; uR12 = memory
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; uR11 = rawsseg
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; uR11 = rawsseg
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; uR9 = state
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; uR9 = state
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; R8 = new value for SSEG
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; R8 = new value for SSEG
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.file "helloworld.S"
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.text
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.globl entry
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.org 0x2000
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.type entry, @function
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entry:
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build_supervisor_state:
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build_supervisor_state:
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CLR R12 ; Load a pointer to our peripherals
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.set peripheral_base, 0xc0000000<<2
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LDIHI $c000h,R12
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LDI build_supervisor_state,R0
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LDI $5f5e1h,R11 ; An amount to reset the timer to: 1/4 sec
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LDI peripheral_base,R12
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LDI 0xc0000000,R12 ; Load a pointer to our peripherals
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LDI $0x5f5e1,R11 ; An amount to reset the timer to: 1/4 sec
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LSL $6,R11
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LSL $6,R11
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LDIHI $8010h,R10 ; A value to clear/reset the PIC for timerA ints
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LDI 0x8010ffff,R0 ; A value to clear/reset the PIC for timerA inst
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LDILO $ffffh,R10
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MOV user_data(PC),uR12 ; User memory (so this isn't supervisor state..)
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MOV $1+PC,uR12 ; User memory (so this isn't supervisor state..)
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; BRA $4
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BRA $4
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BRA build_user_state
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.DAT $0x6e9e1c1c ; Raw SSEG for 'HELL'
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user_data:
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.DAT $0xfc007c70 ; Raw SSEG for 'O UJ'
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.INT 0x6e9e1c1c ; Raw SSEG for 'HELL'
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.DAT $0x3a0a607b ; Raw SSEG for 'orld.'
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.INT 0xfc007c70 ; Raw SSEG for 'O UJ'
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.DAT $0x00000000 ; Raw SSEG for ' '
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.INT 0x3a0a607b ; Raw SSEG for 'orld.'
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.INT 0x00000000 ; Raw SSEG for ' '
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.text
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build_user_state:
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build_user_state:
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LDI $15h,R0
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LDI $0x15,R0
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MOV R0,uR11
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MOV R0,uR11
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MOV $6+PC,uPC
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MOV user_task(PC),uPC
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CLR R0
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CLR R0
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MOV R0,uR9
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MOV R0,uR9
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repeat:
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repeat:
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STO R11,$4(R12) ; Reset the timer
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STO R11,$4(R12) ; Reset the timer
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STO R10,(R12) ; Reset the PIC
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STO R10,(R12) ; Reset the PIC
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RTU
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RTU
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BRA $-4
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; BRA $-4
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BRA repeat
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user_task:
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user_task:
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MOV R9,R0
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MOV R9,R0
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LSR $2,R0
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LSR $2,R0
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ADD R12,R0
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ADD R12,R0
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LOD (R0),R8 ; Read the left word
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LOD (R0),R8 ; Read the left word
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| Line 93... |
Line 104... |
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ADD $1,R9 ; Increment our state
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ADD $1,R9 ; Increment our state
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AND $15,R9
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AND $15,R9
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WAIT ; Wait for the next interrupt
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WAIT ; Wait for the next interrupt
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BRA $-21 ; Back up to the top to start over
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; BRA $-21 ; Back up to the top to start over
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BRA user_task
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BREAK
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BREAK
|
BREAK
|
BREAK
|
BREAK
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BREAK
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