Mercurial > vba-clojure
annotate clojure/com/aurellem/dylans-code @ 119:6cbea8ab65b6
wrote test case for write-memory skeleton
author | Robert McIntyre <rlm@mit.edu> |
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date | Fri, 16 Mar 2012 20:18:54 -0500 |
parents | bcb5c41626b4 |
children |
rev | line source |
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rlm@117 | 1 |
rlm@117 | 2 (defn count-frames* [] |
rlm@117 | 3 (-> (tick (mid-game)) |
rlm@117 | 4 (IE! 0) ; disable interrupts |
rlm@117 | 5 (inject-item-assembly |
rlm@117 | 6 ;; write 00010000 to 0xFF00 to select joypad |
rlm@117 | 7 [0x18 ;D31D ; jump over |
rlm@117 | 8 0x02 ;D31E ; the next 2 bytes |
rlm@117 | 9 0x00 ;D31F ; frame-count |
rlm@117 | 10 0x00 ;D320 ; v-blank-prev |
rlm@117 | 11 |
rlm@117 | 12 |
rlm@117 | 13 0xFA ;D321 |
rlm@117 | 14 0x41 ;D322 ; load (FF41) into A |
rlm@117 | 15 0xFF ;D323 ; this contains mode flags |
rlm@117 | 16 |
rlm@117 | 17 0x47 ;; copy A -> B |
rlm@117 | 18 |
rlm@117 | 19 0xCB |
rlm@117 | 20 0x3F ;; shift A right |
rlm@117 | 21 0x2F ;; complement A |
rlm@117 | 22 |
rlm@117 | 23 0xA0 ;; A & B -> A. |
rlm@117 | 24 0x47 ;; copy A -> B. Now the first bit of B is (VB == 1) |
rlm@117 | 25 |
rlm@117 | 26 0xFA |
rlm@117 | 27 0x20 |
rlm@117 | 28 0xD3 ;; load v-blank-prev into A |
rlm@117 | 29 |
rlm@117 | 30 0xA0 ;; A & B -> A. |
rlm@117 | 31 0x4F ;; copy A to C. Now C contains increment-counter? |
rlm@117 | 32 |
rlm@117 | 33 0xFA |
rlm@117 | 34 0x1F |
rlm@117 | 35 0xD3 ;; load frame-count into A |
rlm@117 | 36 |
rlm@117 | 37 0x81 ;; add increment-counter? to frame-count |
rlm@117 | 38 0xEA ;; store A into frame-count |
rlm@117 | 39 0x1F |
rlm@117 | 40 0xD3 |
rlm@117 | 41 |
rlm@117 | 42 0x3E ;; load 1 into A |
rlm@117 | 43 0x01 |
rlm@117 | 44 0xA0 ;; A & B -> A. Now A is (VB==1) |
rlm@117 | 45 0xEA ;; store A into v-blank-prev |
rlm@117 | 46 0x20 |
rlm@117 | 47 0xD3 |
rlm@117 | 48 |
rlm@117 | 49 0xC3 ;D348 ; return to beginning |
rlm@117 | 50 0x1D ;D349 |
rlm@117 | 51 0xD3 ;D34A |
rlm@117 | 52 |
rlm@117 | 53 |
rlm@117 | 54 ]))) |