6502.org

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AND(Ф1, NOT(/EN))

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init:
    ; sei
    ; cli

rep:
    ; V0 & V1 are 1-byte variables in zeropage (addresses $03 and $04)
    lda #$22
    sta V0
    lda #$66
    adc V0
    sta V1
    jmp rep

Code: Select all

name               type    start_time    duration          data
Simple Parallel    data    0.660707      2.25e-06          0x00000000000000E0
Simple Parallel    data    1.34691575    5e-07             0x00000000000000E0
Simple Parallel    data    2.000103      4.99999999e-07    0x00000000000000E0
Simple Parallel    data    2.64241125    5e-07             0x0000000000000048
Simple Parallel    data    3.3433495     5e-07             0x00000000000000E4
Simple Parallel    data    3.98544175    5e-07             0x00000000000000F0
Simple Parallel    data    4.75634       5e-07             0x00000000000000E4
Simple Parallel    data    5.532079      4.99999999e-07    0x0000000000000000 <======\
Simple Parallel    data    7.202979      4.99999999e-07    0x00000000000000E0 <===== Init vector value
Simple Parallel    data    7.859063      5e-07             0x00000000000000A8 <===== LDA (zp), should be $A9 (see explanation below)
Simple Parallel    data    8.77373775    4.99999998e-07    0x0000000000000022 <===== $22
Simple Parallel    data    11.8429005    4.99999998e-07    0x0000000000000084 <===== STA (zp)
Simple Parallel    data    12.5692233    5e-07             0x0000000000000002 <===== V0
Simple Parallel    data    13.6989845    5e-07             0x0000000000000022 <= write to RAM
Simple Parallel    data    14.6416862    5.00000002e-07    0x00000000000000A8 <===== LDA (zp), should be $A9
Simple Parallel    data    15.5184153    5e-07             0x0000000000000066 <===== $66
Simple Parallel    data    18.1610468    4.99999998e-07    0x0000000000000064 <===== ADC (zp)
Simple Parallel    data    20.696395     5.00000002e-07    0x0000000000000002 <====== V0
Simple Parallel    data    22.3814475    5.00000002e-07    0x0000000000000022 <= read from RAM
Simple Parallel    data    23.2602338    5.00000002e-07    0x0000000000000084 <===== STA (zp), should be $85
...
(at this point, I just sat for a whole minute, not being able to fully comprehend what did just happen - did I REALLY just see $22 and $66?!)
...
Simple Parallel    data    94.2452823    4.99999995e-07    0x0000000000000004 <===== V1
Simple Parallel    data    95.0413205    4.99999995e-07    0x0000000000000088 <===== Result of adding $22 + $66 (!)
Simple Parallel    data    96.899481     4.99999995e-07    0x000000000000004C <===== JMP to absolute
Simple Parallel    data    107.656872    5.00000009e-07    0x0000000000000000 <======\
Simple Parallel    data    109.788213    4.99999995e-07    0x00000000000000E0 <===== $E000 (ROM start)