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[F.Rq.] Support for Analogue Pocket .pocket roms #27

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YoshiRulz opened this issue Jul 19, 2024 · 0 comments
Open

[F.Rq.] Support for Analogue Pocket .pocket roms #27

YoshiRulz opened this issue Jul 19, 2024 · 0 comments

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@YoshiRulz
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YoshiRulz commented Jul 19, 2024 •
edited
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For those out-of-the-loop, the Pocket is a proprietary FPGA-based handheld. However, roms made for it (with GB Studio, or GBDK directly) are almost identical to GB roms:

sample diff

Diff from GB to AP variants of GB-Wordyl v1.0.3.

@@ -3,31 +3,31 @@
 00000020: e9ff ffff ffff ffff 220d 20fc c9ff ffff  ........". .....
 00000030: 1a22 130d 20fa c9ff ffff ffff ffff ffff  .".. ...........
 00000040: f5e5 21a5 c0c3 8000 ffff ffff ffff ffff  ..!.............
 00000050: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 00000060: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 00000070: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 00000080: c5d5 2ab6 280b e53a 6e67 e7e1 2318 f3e8  ..*.(..:ng..#...
-00000090: 04d1 c1e1 f041 e602 20fa f1d9 21a3 c034  .....A.. ...!..4
-000000a0: 2002 2334 cd80 ff3e 01e0 91c9 f041 e602   .#4...>.....A..
+00000090: 04d1 c1e1 f041 e640 20fa f1d9 21a3 c034  .....A.@ ...!..4
+000000a0: 2002 2334 cd80 ff3e 01e0 91c9 f041 e640   .#4...>.....A.@
 000000b0: 20fa 3ec0 c384 ffd5 af01 8719 21a0 c0cd   .>.........!...
 000000c0: 3e75 3ec0 e092 67af 6f0e a0ef d1c9 ffff  >u>...g.o.......
 000000d0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 000000e0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 000000f0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
-00000100: 1855 ffff ceed 6666 cc0d 000b 0373 0083  .U....ff.....s..
-00000110: 000c 000d 0008 111f 8889 000e dccc 6ee6  ..............n.
-00000120: dddd d999 bbbb 6763 6e0e eccc dddc 999f  ......gcn.......
-00000130: bbb9 333e 4742 2d57 4f52 4459 4c00 0000  ..3>GB-WORDYL...
-00000140: 0000 0080 3030 031b 0002 0033 011c 7951  ....00.....3..yQ
+00000100: 1855 ffff 0110 ceef 0000 44aa 0074 0018  .U........D..t..
+00000110: 1195 0034 001a 00d5 0022 0069 6ff6 f773  ...4.....".io..s
+00000120: 0990 e110 4440 9a90 d5d0 4430 a921 5d48  [email protected].!]H
+00000130: 22e0 f860 4742 2d57 4f52 4459 4c00 0000  "..`GB-WORDYL...
+00000140: 0000 0080 3030 031b 0002 0033 011c 787f  ....00.....3..x.
 00000150: faa1 c047 faa0 c0f3 5758 3100 e0cd b700  ...G....WX1.....
 00000160: 7aea a0c0 fe11 2007 afcb 3b17 eaa1 c0cd  z..... ...;.....
 00000170: a275 afe0 42e0 43e0 41e0 4a3e 07e0 4b11  .u..B.C.A.J>..K.
 00000180: c601 2180 ff0e 0cf7 cd80 ff01 9c00 cd84  ..!.............
-00000190: 753e e4e0 47e0 483e 1be0 493e c0e0 40af  u>..G.H>..I>..@.
+00000190: 753e e4e0 47e0 483e 1be0 493e 03e0 4eaf  u>..G.H>..I>..N.
 000001a0: e00f 3e01 e0ff e090 af21 a3c0 2277 e026  ..>......!.."w.&
 000001b0: cd16 79fb cdd5 0276 0018 fcf3 f802 afe0  ..y....v........
 000001c0: 0f7e fbe0 ffc9 f092 b7c8 e046 3e28 3d20  .~.........F>(= 
 000001d0: fdc9 ffff ffff ffff ffff ffff ffff ffff  ................
 000001e0: c9ff ffff ffff ffff ffff ffff ffff ffff  ................
 000001f0: ffff ffff ffff ffff ffff ffff ffff ffff  ................
 00000200: 21a2 cc36 0021 a3cc 3600 21a4 cc36 0121  !..6.!..6.!..6.!
@@ -41,25 +41,25 @@
 00000280: 0d11 0000 d511 a802 3e68 cdc1 27c9 01a2  ........>h..'...
 00000290: cc0a cb47 2804 af02 1803 3e01 023e 07cd  ...G(.....>..>..
 000002a0: 4a08 cd75 71c3 9d24 4841 5244 204d 4f44  J..uq..$HARD MOD
 000002b0: 453a 2043 414e 0a4f 4e4c 5920 4348 414e  E: CAN.ONLY CHAN
 000002c0: 4745 2041 540a 5354 4152 5420 4f46 2052  GE AT.START OF R
 000002d0: 4f55 4e44 003e 01e0 9021 0030 3600 2620  OUND.>...!.06.& 
 000002e0: 3601 2640 3600 6536 00cd 560c cde4 113e  6.&@6.e6..V....>
-000002f0: 07e0 4b3e 90e0 4af0 40f6 20e0 40f0 40f6  ..K>..J.@. .@.@.
-00000300: 01e0 40f0 40f6 80e0 40cd 1326 cdef 24cd  ..@.@...@..&..$.
+000002f0: 07e0 4b3e 90e0 4af0 4ef6 04e0 4ef0 4ef6  ..K>..J.N...N.N.
+00000300: 80e0 4ef0 4ef6 01e0 4ecd 1326 cdef 24cd  ..N.N...N..&..$.
 00000310: 1d15 218f cc36 003e 80e0 263e ffe0 253e  ..!..6.>..&>..%>
 00000320: 77e0 24f3 11c5 26d5 cdc5 75e1 fbfa 8fcc  w.$...&...u.....
 00000330: b728 17fa 8fcc d602 282b fa8f ccd6 0328  .(......(+.....(
 00000340: 69fa 8fcc d604 2868 18e3 cd39 1911 29da  i.....(h...9..).
 00000350: f004 1221 54cc 36de 2336 0dcd 940a 218f  ...!T.6.#6....!.
 00000360: cc36 0218 c8cd ca0a cd2b 1221 27da cb46  .6.......+.!'..F
 00000370: 282e cd35 0221 a6cc cb46 2805 cdc9 1b18  (..5.!...F(.....
 00000380: 03cd ec06 2127 da36 0011 28da f004 1221  ....!'.6..(....!
-00000390: 28da 2a4f 46c5 cd92 78e1 f040 f602 e040  (.*OF...x..@...@
+00000390: 28da 2a4f 46c5 cd92 78e1 f04e f640 e04e  (.*[email protected]
 000003a0: cd6e 0a21 8fcc 3603 1883 cdf9 0ac3 2d03  .n.!..6.......-.
 000003b0: cde4 1121 8fcc 3602 c32d 0321 b1c0 3600  ...!..6..-.!..6.
 000003c0: cd2d 0521 87da 3600 2185 da3e 7222 3605  .-.!..6.!..>r"6.
 000003d0: 1100 00d5 11b3 c03e 08cd c127 012a da21  .......>...'.*.!
 000003e0: b2c0 6e26 0029 095d 541a 2160 c122 131a  ..n&.).]T.!`."..
 000003f0: 7721 61c1 3ab6 280b 2160 c16e fa61 c167  w!a.:.(.!`.n.a.g
 00000400: cd69 7721 b1c0 cb46 2803 cd75 7121 87da  .iw!...F(..uq!..
@@ -192,29 +192,29 @@
 00000bf0: cc7e d604 3008 34c5 3e03 cd4a 08c1 0e01  .~..0.4.>..J....
 00000c00: 1809 c5af cd4a 08cd 7a0f c1c5 cda8 0ec1  .....J..z.......
 00000c10: c305 0b7a b328 1321 c1cc 7eb7 2808 35c5  ...z.(.!..~.(.5.
 00000c20: 3e03 cd4a 08c1 0e01 180a c53e 01cd 4a08  >..J.......>..J.
 00000c30: cdd0 0fc1 c5cd a80e c1c3 050b 3333 c901  ............33..
 00000c40: ddc1 0269 6023 73c5 cd70 73e1 c901 bb7f  ...i`#s..ps.....
 00000c50: b556 f925 0000 0e04 79b7 2806 cd92 750d  .V.%....y.(...u.
-00000c60: 18f6 f040 f680 e040 cd28 737b b7c8 216b  ...@...@.(s{..!k
+00000c60: 18f6 f04e f601 e04e cd28 737b b7c8 216b  ...N...N.(s{..!k
 00000c70: da36 010e 003e 1391 380b 21dd c106 0009  .6...>..8.!.....
 00000c80: 3600 0c18 f01e 013e b9cd 3f0c 3ee4 e049  6......>..?.>..I
-00000c90: 3ee4 e048 3ee4 e047 afe0 42af e043 f040  >..H>..G..B..C.@
-00000ca0: 4ff0 40e6 fde0 40f0 40e6 dfe0 40f0 40f6  O.@...@.@...@.@.
-00000cb0: 01e0 40f0 40f6 80e0 4011 f1c1 d511 f828  ..@.@...@......(
+00000c90: 3ee4 e048 3ee4 e047 afe0 42af e043 f04e  >..H>..G..B..C.N
+00000ca0: 4ff0 4ee6 bfe0 4ef0 4ee6 fbe0 4ef0 4ef6  O.N...N.N...N.N.
+00000cb0: 80e0 4ef0 4ef6 01e0 4e11 f1c1 d511 f828  ..N.N...N......(
 00000cc0: d5cd d874 e804 2151 cc3e f122 36c1 0600  ...t..!Q.>."6...
 00000cd0: 583e 0d93 381d 1600 3e13 9238 1378 04d5  X>..8...>..8.x..
 00000ce0: f533 7bf5 33d5 33cd d772 e803 d114 18e8  .3{.3.3..r......
 00000cf0: 1c18 de21 51cc 2a5f 56d5 2100 a6e5 cd04  ...!Q.*_V.!.....
 00000d00: 78e8 04c5 1e00 3e99 cd3f 0cc1 11f1 c1d5  x.....>..?......
 00000d10: 1186 1dd5 cdd8 74e8 0411 f1c1 d521 0070  ......t......!.p
 00000d20: e5cd 0478 e804 11d8 28d5 2180 02e5 cd04  ...x....(.!.....
 00000d30: 78e8 04c5 1e00 3ea1 cd3f 0cc1 114d 0cd5  x.....>..?...M..
-00000d40: cd70 73e1 79e0 40af 672e 12e5 3e14 f533  [email protected]...>..3
+00000d40: cd70 73e1 79e0 4eaf 672e 12e5 3e14 f533  .ps.y.N.g...>..3
 00000d50: af0f f5cd 1777 e805 1e00 3eb9 c33f 0ce8  .....w....>..?..
 00000d60: fa21 54cc 4e23 461e 1bf8 0036 e623 36d9  .!T.N#F....6.#6.
 00000d70: 0af8 0277 037e 3c28 4c0a f804 3203 0a22  ...w.~<(L...2.."
 00000d80: 2303 73f8 043a 9630 e723 d1d5 3a2b 12d1  #.s..:.0.#..:+..
 00000d90: d513 7e12 1333 33d5 f805 7eea 8bda 1104  ..~..33...~.....
 00000da0: 0ed5 2102 02e5 f806 2a23 f533 7ef5 33cd  ..!.....*#.3~.3.
 00000db0: 9d78 e806 218b da36 00f8 0534 3434 343a  .x..!..6...4444:
@@ -593,15 +593,15 @@
 00002500: d5af 3cf5 cd04 78e8 0401 b6d8 c511 f32f  ..<...x......../
 00002510: d5cd d874 e804 c521 c10a e5cd 4d76 e804  ...t...!....Mv..
 00002520: 11d6 d4d5 1143 2fd5 cdd8 74e8 0411 d6d4  .....C/...t.....
 00002530: d521 9308 e5cd 4d76 e804 116e d3d5 11d2  .!....Mv...n....
 00002540: 2fd5 cdd8 74e8 04c5 cd64 27c1 c511 4230  /...t....d'...B0
 00002550: d5cd d874 e804 c521 9b26 e5cd 4d76 e804  ...t...!.&..Mv..
 00002560: 11d6 d4d5 11fd 2cd5 cdd8 74e8 0411 682f  ......,...t...h/
-00002570: d5af f533 cdf0 73e8 03f0 40e6 fbe0 4021  ...3..s...@...@!
+00002570: d5af f533 cdf0 73e8 03f0 4ee6 dfe0 4e21  ...3..s...N...N!
 00002580: 02c0 3600 2106 c036 0021 0ac0 3600 210e  ..6.!..6.!..6.!.
 00002590: c036 0021 03c0 3600 2107 c036 2021 0bc0  .6.!..6.!..6 !..
 000025a0: 3640 210f c036 60f8 0036 010e 0479 d608  6@!..6`..6...y..
 000025b0: 301c f800 4634 6926 0029 295d 5421 01c0  0...F4i&.))]T!..
 000025c0: 1923 7021 01c0 1923 2336 030c 18df 2122  .#p!...##6....!"
 000025d0: c036 0521 26c0 3606 212a c036 0621 2ec0  .6.!&.6.!*.6.!..
 000025e0: 3605 2123 c036 1621 27c0 3616 212b c036  6.!#.6.!'.6.!+.6
@@ -1827,104 +1827,104 @@
 00007220: 4f9f 9047 f1e6 80c8 9793 5f9f 9257 c9f1  O..G......_..W..
 00007230: f1c9 0600 507b b220 0701 0000 5059 37c9  ....P{. ....PY7.
 00007240: 6960 0100 00b7 3e10 f5cb 15cb 14cb 11cb  i`....>.........
 00007250: 10c5 799b 4f78 9a47 3f38 08c1 f13d b720  ..y.Ox.G?8...=. 
 00007260: e718 08f1 f13d 3720 df18 0050 59cb 154d  .....=7 ...PY..M
 00007270: cb14 44b7 c9c5 0e6a 1803 c50e 68f8 042a  ..D....j....h..*
 00007280: 8787 87f6 80e2 0c2a 8787 8747 2a66 6ff0  .......*...G*fo.
-00007290: 41e6 0220 fa2a e205 20f5 c1c9 c50e 6a18  A.. .*.. .....j.
+00007290: 41e6 4020 fa2a e205 20f5 c1c9 c50e 6a18  A.@ .*.. .....j.
 000072a0: 03c5 0e68 f804 2a87 8747 2a80 87f6 80e2  ...h..*..G*.....
-000072b0: 0c2a 666f f041 e602 20fa 7de2 7ce2 c1c9  .*fo.A.. .}.|...
-000072c0: f802 2a5f 2a57 f041 e602 20fa 7e12 c9f0  ..*_*W.A.. .~...
-000072d0: 40e6 4028 0818 0af0 40e6 0820 0416 9818  @.@(....@.. ....
+000072b0: 0c2a 666f f041 e640 20fa 7de2 7ce2 c1c9  .*fo.A.@ .}.|...
+000072c0: f802 2a5f 2a57 f041 e640 20fa 7e12 c9f0  ..*_*W.A.@ .~...
+000072d0: 4ee6 0228 0818 0af0 4ee6 1020 0416 9818  N..(....N.. ....
 000072e0: 0216 9cc5 f804 2a47 2a5a cb37 074f e603  ......*G*Z.7.O..
-000072f0: 8357 3ee0 a180 5ff0 41e6 0220 fa7e 12c1  .W>..._.A.. .~..
-00007300: c9f0 40e6 4028 0818 0af0 40e6 0820 0416  ..@.@(....@.. ..
+000072f0: 8357 3ee0 a180 5ff0 41e6 4020 fa7e 12c1  .W>..._.A.@ .~..
+00007300: c9f0 4ee6 0228 0818 0af0 4ee6 1020 0416  ..N..(....N.. ..
 00007310: 9818 0216 9cf8 033a 6e5a cb37 0767 e603  .......:nZ.7.g..
 00007320: 8357 3ee0 a485 5fc9 c5e8 f0f8 000e 10af  .W>..._.........
 00007330: eff8 003e 8922 3e03 32cd 7573 0e00 3e30  ...>.">.2.us..>0
 00007340: e2f2 f21e 04f2 473e 20e2 f2f2 3e10 e2f2  ......G> ...>...
 00007350: f23e 30e2 f2f2 f2f2 b820 071d 20e8 1e00  .>0...... .. ...
 00007360: 180a f801 3e00 32cd 7573 1e01 e810 c1c9  ....>.2.us......
 00007370: f802 2a66 6fc5 7ee6 0328 39f5 0e00 e23e  ..*fo.~..(9....>
 00007380: 30e2 0610 1e08 2a57 cb3a 3e10 3802 3e20  0.....*W.:>.8.> 
 00007390: e2f2 f23e 30e2 f2f2 1d20 ed05 20e6 3e20  ...>0.... .. .> 
 000073a0: e2f2 f23e 30e2 11d0 20f0 001b 7ab3 20f9  ...>0... ...z. .
 000073b0: f13d 20c7 c1c9 d5f8 053a 6e60 477d 69cb  .= ......:n`G}i.
 000073c0: 381f 4f30 032a 1213 cb38 cb19 040c 300e  8.O0.*...8....0.
 000073d0: 1806 2a12 132a 1213 2a12 132a 1213 0d20  ..*..*..*..*... 
-000073e0: f105 20ee c1e1 f1e9 1690 f040 e610 2802  .. ........@..(.
+000073e0: f105 20ee c1e1 f1e9 1690 f04e e608 2802  .. ........N..(.
 000073f0: 1680 f802 2acb 375f e60f 8257 7be6 f05f  ....*.7_...W{.._
 00007400: cb5a 2802 cba2 2a66 6fc5 d52a b7ca b374  .Z(...*fo..*...t
 00007410: cb7f 2048 cb77 201a e63f 3c4f 2a47 f041  .. H.w ..?<O*G.A
-00007420: e602 20fa 7812 13cb 5a28 02cb a20d 20ee  .. .x...Z(.... .
-00007430: 18d9 e63f 3c4f 2a47 f041 e602 20fa 7812  ...?<O*G.A.. .x.
-00007440: 13cb 5a28 02cb a2f0 41e6 0220 fa7e 1213  ..Z(....A.. .~..
+00007420: e640 20fa 7812 13cb 5a28 02cb a20d 20ee  .@ .x...Z(.... .
+00007430: 18d9 e63f 3c4f 2a47 f041 e640 20fa 7812  ...?<O*G.A.@ .x.
+00007440: 13cb 5a28 02cb a2f0 41e6 4020 fa7e 1213  ..Z(....A.@ .~..
 00007450: cb5a 2802 cba2 0d20 df23 18af cb77 203a  .Z(.... .#...w :
 00007460: e63f 3ce5 4e23 46f8 03cb 6628 0b62 6b09  .?<.N#F...f(.bk.
-00007470: cb5c 2002 cbe4 1803 626b 094f f041 e602  .\ .....bk.O.A..
+00007470: cb5c 2002 cbe4 1803 626b 094f f041 e640  .\ .....bk.O.A.@
 00007480: 20fa 2a12 cb5c 2802 cba4 13cb 5a28 02cb   .*..\(.....Z(..
 00007490: a20d 20e8 e123 23c3 0b74 e63f 3c4f f041  .. ..##..t.?<O.A
-000074a0: e602 20fa 2a12 13cb 5a28 02cb a20d 20ee  .. .*...Z(.... .
+000074a0: e640 20fa 2a12 13cb 5a28 02cb a20d 20ee  .@ .*...Z(.... .
 000074b0: c30b 74d1 c1c9 f04d e680 c8f0 fff5 afe0  ..t....M........
 000074c0: ffe0 0f3e 30e0 003e 01e0 4d10 00f1 e0ff  ...>0..>..M.....
 000074d0: c9f0 4de6 80c0 18e3 f805 3a57 3a5f 3a6e  ..M.......:W:_:n
 000074e0: 67c5 d52a b728 4ecb 7f20 24cb 7720 0ce6  g..*.(N.. $.w ..
 000074f0: 3f3c 472a 1213 0520 fb18 e8e6 3f3c 4623  ?<G*... ....?<F#
 00007500: 4e23 f578 1213 7912 13f1 3d20 f518 d4cb  N#.x..y...= ....
 00007510: 7720 16e6 3f3c e54e 2346 626b 0947 2a12  w ..?<.N#Fbk.G*.
 00007520: 1305 20fa e123 2318 bae6 3f3c 472a 1213  .. ..##...?<G*..
 00007530: 0520 fa18 aee1 7b95 5f7a 9c57 c1c9 5f78  . ....{._z.W.._x
 00007540: b1c8 730b 545d 1378 b1c8 cb38 cb19 3003  ..s.T].x...8..0.
 00007550: 2a12 1304 0c18 062a 1213 2a12 130d 20f7  *......*..*... .
 00007560: 0520 f4c9 21a5 c02a 5f56 23b2 c87b b920  . ..!..*_V#..{. 
 00007570: f67a b820 f254 5d1b 1b2a 1247 132a 1213  .z. .T]..*.G.*..
 00007580: b0c8 18f5 21a5 c02a b628 0323 18f9 7832  ....!..*.(.#..x2
-00007590: 71c9 f040 e680 c8af e091 7600 f091 b728  [email protected]....(
-000075a0: f9c9 f040 e680 c8f0 44fe 9230 faf0 44fe  [email protected].
-000075b0: 9138 faf0 40e6 7fe0 40c9 c5f8 042a 4f46  .8..@...@....*OF
+00007590: 71c9 f04e e601 c8af e091 7600 f091 b728  q..N......v....(
+000075a0: f9c9 f04e e601 c8f0 44fe 9230 faf0 44fe  ...N....D..0..D.
+000075b0: 9138 faf0 4ee6 fee0 4ec9 c5f8 042a 4f46  .8..N...N....*OF
 000075c0: cd64 75c1 c9c5 f804 2a4f 46cd 8475 c1c9  .du.....*OF..u..
 000075d0: 1a4f 3e0f 2183 da96 3e00 17a1 c021 84da  .O>.!...>....!..
 000075e0: 4ecb 7928 0caf e019 afe0 18af e017 afe0  N.y(............
 000075f0: 16cb 6928 0caf e023 afe0 22af e021 afe0  ..i(...#.."..!..
 00007600: 201a e60f ea83 da1a ea84 da13 1aea 80da   ...............
 00007610: 1321 23da 7b22 7221 81da 3600 c943 4254  .!#.{"r!..6..CBT
 00007620: 2d46 5820 4259 2043 4f46 4645 4542 4154  -FX BY COFFEEBAT
 00007630: 2032 3032 312d 3230 3232 00c5 f804 2a57   2021-2022....*W
 00007640: 5ef8 083a 473a 666f cdc1 76c1 c916 90f0  ^..:G:fo..v.....
-00007650: 40e6 1028 0216 80c5 f804 2a5f 2a4f 2a66  @..(......*_*O*f
+00007650: 4ee6 0828 0216 80c5 f804 2a5f 2a4f 2a66  N..(......*_*O*f
 00007660: 6fcb 337b e60f 8257 7be6 f05f d554 5de1  o.3{...W{.._.T].
 00007670: cb5c 2802 cba4 0608 c51a 13d5 e521 88da  .\(..........!..
 00007680: 4e23 6669 1e08 1f38 0354 1801 55cb 3acb  N#fi...8.T..U.:.
-00007690: 19cb 3acb 181d 20ee e1f0 41e6 0220 fa71  ..:... ...A.. .q
+00007690: 19cb 3acb 181d 20ee e1f0 41e6 4020 fa71  ..:... ...A.@ .q
 000076a0: 2c70 23d1 c105 20d0 0d20 c5c1 c9c5 f804  ,p#... .. ......
 000076b0: 2a57 5ef8 093a 473a 4f3a 666f cda5 77c1  *W^..:G:O:fo..w.
-000076c0: c9e5 f040 e640 2809 180c e5f0 40e6 0820  ...@.@(.....@.. 
+000076c0: c9e5 f04e e602 2809 180c e5f0 4ee6 1020  ...N..(.....N.. 
 000076d0: 0521 0098 1803 2100 9cc5 cb33 cb03 7be6  .!....!....3..{.
-000076e0: 0384 473e e0a3 824f e1d1 d5c5 f041 e602  ..G>...O.....A..
+000076e0: 0384 473e e0a3 824f e1d1 d5c5 f041 e640  ..G>...O.....A.@
 000076f0: 20fa 7c02 79e6 e05f 793c e61f b34f 1520   .|.y.._y<...O. 
 00007700: ebc1 d11d c8d5 78e6 fc5f 3e20 814f 8891  ......x.._> .O..
 00007710: e603 b347 c518 d5c5 f804 2a57 5ef8 083a  ...G......*W^..:
 00007720: 473a 666f cdca 76c1 c9f5 d516 7fcd 3977  G:fo..v.......9w
 00007730: b720 f815 20f7 d1f1 c93e 20e0 00f0 00f0  . .. ....> .....
 00007740: 00e6 0f5f 3e10 e000 f000 f000 f000 f000  ..._>...........
 00007750: f000 f000 e60f cb37 b32f 5f3e 30e0 007b  .......7./_>0..{
 00007760: c957 cd39 77a2 28fa c9e9 f802 2aea 88da  .W.9w.(.....*...
 00007770: 2aea 89da 7eea 8ada c9c5 cd8f 7706 32c5  *...~.......w.2.
 00007780: c1c5 c100 05c2 7f77 00c1 c5c1 0000 c91b  .......w........
 00007790: 7bb2 c806 33c5 c1c5 c100 05c2 9577 00c5  {...3........w..
-000077a0: c100 0018 eae5 f040 e640 2809 180c e5f0  .......@.@(.....
-000077b0: 40e6 0820 0521 0098 1803 2100 9cc5 cb33  @.. .!....!....3
+000077a0: c100 0018 eae5 f04e e602 2809 180c e5f0  .......N..(.....
+000077b0: 4ee6 1020 0521 0098 1803 2100 9cc5 cb33  N.. .!....!....3
 000077c0: cb03 7be6 0384 473e e0a3 824f e1d1 d5c5  ..{...G>...O....
-000077d0: f041 e602 20fa fa8b da86 0223 79e6 e05f  .A.. ......#y.._
+000077d0: f041 e640 20fa fa8b da86 0223 79e6 e05f  .A.@ ......#y.._
 000077e0: 793c e61f b34f 1520 e7c1 d11d c8d5 78e6  y<...O. ......x.
 000077f0: fc5f 3e20 814f 8891 e603 b347 c518 d1f8  ._> .O.....G....
-00007800: 0656 180a 1690 f040 e610 2802 1680 c5f8  .V.....@..(.....
+00007800: 0656 180a 1690 f04e e608 2802 1680 c5f8  .V.....N..(.....
 00007810: 042a 5f2a 4f2a 666f cb33 7be6 0f82 577b  .*_*O*fo.3{...W{
-00007820: e6f0 5fcb 5a28 02cb a206 10f0 41e6 0220  .._.Z(......A.. 
+00007820: e6f0 5fcb 5a28 02cb a206 10f0 41e6 4020  .._.Z(......A.@ 
 00007830: fa2a 1213 0520 f40d 20e9 c1c9 f802 2a66  .*... .. .....*f
 00007840: 6f11 0000 2ab7 c813 18fa f802 2a5f 2a57  o...*.......*_*W
 00007850: 2a66 6f1a 9620 08be 1323 20f7 575f c911  *fo.. ...# .W_..
 00007860: ffff d811 0100 c9fa 25da 6f5f fa26 da57  ........%.o_.&.W
 00007870: cb25 17cb 2517 cb25 17cb 2517 677b 856f  .%..%..%..%.g{.o
 00007880: 7c8a 677d c693 ea25 da57 7cce 5cea 26da  |.g}...%.W|.\.&.
 00007890: 5fc9 f802 2aea 25da 7eea 26da c9c5 f804  _...*.%.~.&.....

(There doesn't appear to be any official documentation on this instruction set. Analogue, the company, apparently sponsored the addition of the ap target to GBDK, making it effectively a reference implementation.)

The main difference seems to be that the graphics interface uses a different bus address and uses bitmasks which are reversed as compared to the Game Boy. I'm inferring this from GBDK's source; when you replace the linker flag -msm83:gb with -msm83:ap, the platform-specific implementations are switched out, the differences between them being:

diffs

/gbdk-lib/libc/targets/sm83/{gb,ap}/crt0.s:

@@ -145,32 +145,26 @@ _set_interrupts::
         ;; Jump table for modes: 4 modes, 4 bytes each 16 bytes total
         RET
 
         ;; GameBoy Header
         .org    0x100
 .header:
         JR      .code_start
 
         ;; Nintendo logo
         .org    0x104
-        .byte   0xCE,0xED,0x66,0x66
-        .byte   0xCC,0x0D,0x00,0x0B
-        .byte   0x03,0x73,0x00,0x83
-        .byte   0x00,0x0C,0x00,0x0D
-        .byte   0x00,0x08,0x11,0x1F
-        .byte   0x88,0x89,0x00,0x0E
-        .byte   0xDC,0xCC,0x6E,0xE6
-        .byte   0xDD,0xDD,0xD9,0x99
-        .byte   0xBB,0xBB,0x67,0x63
-        .byte   0x6E,0x0E,0xEC,0xCC
-        .byte   0xDD,0xDC,0x99,0x9F
-        .byte   0xBB,0xB9,0x33,0x3E
+        .byte   0x01,0x10,0xCE,0xEF,0x00,0x00,0x44,0xAA
+        .byte   0x00,0x74,0x00,0x18,0x11,0x95,0x00,0x34
+        .byte   0x00,0x1A,0x00,0xD5,0x00,0x22,0x00,0x69
+        .byte   0x6F,0xF6,0xF7,0x73,0x09,0x90,0xE1,0x10
+        .byte   0x44,0x40,0x9A,0x90,0xD5,0xD0,0x44,0x30
+        .byte   0xA9,0x21,0x5D,0x48,0x22,0xE0,0xF8,0x60
 
         ;; Title of the game
         .org    0x134
         .asciz  "Title"
 
         .org    0x144
         .byte   0,0,0
 
         ;; Cartridge type is ROM only
         .org    0x147

/gbdk-lib/libc/targets/sm83/{gb,ap}/global.s:

@@ -182,69 +182,69 @@
         AUDTERM_2_RIGHT = 0b00000010
         AUDTERM_1_RIGHT = 0b00000001
 
         .NR52           = 0x26  ; Sound register
         rNR52           = 0xFF26
         rAUDENA         = 0xFF26
 
         AUDENA_ON       = 0b10000000
         AUDENA_OFF      = 0b00000000  ; sets all audio regs to 0!
 
-        .LCDC           = 0x40  ; LCD control
-        rLCDC           = 0xFF40
+        .LCDC           = 0x4E  ; LCD control
+        rLCDC           = 0xFF4E
 
         LCDCF_OFF       = 0b00000000 ; LCD Control Operation
-        LCDCF_ON        = 0b10000000 ; LCD Control Operation
+        LCDCF_ON        = 0b00000001 ; LCD Control Operation
         LCDCF_WIN9800   = 0b00000000 ; Window Tile Map Display Select
-        LCDCF_WIN9C00   = 0b01000000 ; Window Tile Map Display Select
+        LCDCF_WIN9C00   = 0b00000010 ; Window Tile Map Display Select
         LCDCF_WINOFF    = 0b00000000 ; Window Display
-        LCDCF_WINON     = 0b00100000 ; Window Display
+        LCDCF_WINON     = 0b00000100 ; Window Display
         LCDCF_BG8800    = 0b00000000 ; BG & Window Tile Data Select
-        LCDCF_BG8000    = 0b00010000 ; BG & Window Tile Data Select
+        LCDCF_BG8000    = 0b00001000 ; BG & Window Tile Data Select
         LCDCF_BG9800    = 0b00000000 ; BG Tile Map Display Select
-        LCDCF_BG9C00    = 0b00001000 ; BG Tile Map Display Select
+        LCDCF_BG9C00    = 0b00010000 ; BG Tile Map Display Select
         LCDCF_OBJ8      = 0b00000000 ; OBJ Construction
-        LCDCF_OBJ16     = 0b00000100 ; OBJ Construction
+        LCDCF_OBJ16     = 0b00100000 ; OBJ Construction
         LCDCF_OBJOFF    = 0b00000000 ; OBJ Display
-        LCDCF_OBJON     = 0b00000010 ; OBJ Display
+        LCDCF_OBJON     = 0b01000000 ; OBJ Display
         LCDCF_BGOFF     = 0b00000000 ; BG Display
-        LCDCF_BGON      = 0b00000001 ; BG Display
-        LCDCF_B_ON      = 7
-        LCDCF_B_WIN9C00 = 6
-        LCDCF_B_WINON   = 5
-        LCDCF_B_BG8000  = 4
-        LCDCF_B_BG9C00  = 3
-        LCDCF_B_OBJ16   = 2
-        LCDCF_B_OBJON   = 1
-        LCDCF_B_BGON    = 0
+        LCDCF_BGON      = 0b10000000 ; BG Display
+        LCDCF_B_ON      = 0
+        LCDCF_B_WIN9C00 = 1
+        LCDCF_B_WINON   = 2
+        LCDCF_B_BG8000  = 3
+        LCDCF_B_BG9C00  = 4
+        LCDCF_B_OBJ16   = 5
+        LCDCF_B_OBJON   = 6
+        LCDCF_B_BGON    = 7
 
         .STAT           = 0x41  ; LCD status
         rSTAT           = 0xFF41
 
-        STATF_LYC       = 0b01000000 ; LYC=LY Coincidence (Selectable)
-        STATF_MODE10    = 0b00100000 ; Mode 10
-        STATF_MODE01    = 0b00010000 ; Mode 01 (V-Blank)
-        STATF_MODE00    = 0b00001000 ; Mode 00 (H-Blank)
-        STATF_LYCF      = 0b00000100 ; Coincidence Flag
+        STATF_LYC       = 0b00000010 ; LYC=LY Coincidence (Selectable)
+        STATF_MODE10    = 0b00000100 ; Mode 10
+        STATF_MODE01    = 0b00001000 ; Mode 01 (V-Blank)
+        STATF_MODE00    = 0b00010000 ; Mode 00 (H-Blank)
+        STATF_LYCF      = 0b00100000 ; Coincidence Flag
         STATF_HBL       = 0b00000000 ; H-Blank
-        STATF_VBL       = 0b00000001 ; V-Blank
-        STATF_OAM       = 0b00000010 ; OAM-RAM is used by system
-        STATF_LCD       = 0b00000011 ; Both OAM and VRAM used by system
-        STATF_BUSY      = 0b00000010 ; When set, VRAM access is unsafe
-        STATF_B_LYC     = 6
-        STATF_B_MODE10  = 5
-        STATF_B_MODE01  = 4
-        STATF_B_MODE00  = 3
-        STATF_B_LYCF    = 2
-        STATF_B_VBL     = 0
-        STATF_B_OAM     = 1
-        STATF_B_BUSY    = 1
+        STATF_VBL       = 0b10000000 ; V-Blank
+        STATF_OAM       = 0b01000000 ; OAM-RAM is used by system
+        STATF_LCD       = 0b11000000 ; Both OAM and VRAM used by system
+        STATF_BUSY      = 0b01000000 ; When set, VRAM access is unsafe
+        STATF_B_LYC     = 1
+        STATF_B_MODE10  = 2
+        STATF_B_MODE01  = 3
+        STATF_B_MODE00  = 4
+        STATF_B_LYCF    = 5
+        STATF_B_VBL     = 7
+        STATF_B_OAM     = 6
+        STATF_B_BUSY    = 6
 
         .SCY            = 0x42  ; Scroll Y
         rSCY            = 0xFF42
 
         .SCX            = 0x43  ; Scroll X
         rSCX            = 0xFF43
 
         .LY             = 0x44  ; LCDC Y-coordinate
         rLY             = 0xFF44
 
@@ -502,24 +502,25 @@ lbl:
         ADD_A_REG16     regH, regL
 .endm
 
 .macro SIGNED_SUB_A_REG16 regH regL ?lbl
         ; negate A then add to 16-bit value
         CPL
         INC     A
         SIGNED_ADD_A_REG16      regH, regL
 .endm
 
-.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2
+.macro MUL_DE_BY_A_RET_HL ?lbl1 ?lbl2 ?lbl3
         ; Multiply DE by A, return result in HL; preserves: BC
         LD      HL, #0
 lbl1:
         SRL     A
         JR      NC, lbl2
         ADD     HL, DE
 lbl2:
+        JR      Z, lbl3
         SLA     E
         RL      D
-        OR      A
-        JR      NZ, lbl1
+        JR      lbl1
+lbl3:
 .endm

/gbdk-lib/libc/targets/sm83/{gb,ap}/sfr.s:

@@ -45,21 +45,21 @@ _NR33_REG    = 0xFF1D    ; Sound register
 _NR34_REG    = 0xFF1E    ; Sound register
 _NR41_REG    = 0xFF20    ; Sound register
 _NR42_REG    = 0xFF21    ; Sound register
 _NR43_REG    = 0xFF22    ; Sound register
 _NR44_REG    = 0xFF23    ; Sound register
 _NR50_REG    = 0xFF24    ; Sound register
 _NR51_REG    = 0xFF25    ; Sound register
 _NR52_REG    = 0xFF26    ; Sound register
 _PCM_SAMPLE  = 0xFF30    ; PCM wave pattern
 _AUD3WAVE    = 0xFF30    ; PCM wave pattern
-_LCDC_REG    = 0xFF40    ; LCD control
+_LCDC_REG    = 0xFF4E    ; LCD control
 _STAT_REG    = 0xFF41    ; LCD status
 _SCY_REG     = 0xFF42    ; Scroll Y
 _SCX_REG     = 0xFF43    ; Scroll X
 _LY_REG      = 0xFF44    ; LCDC Y-coordinate
 _LYC_REG     = 0xFF45    ; LY compare
 _DMA_REG     = 0xFF46    ; DMA transfer
 _BGP_REG     = 0xFF47    ; BG palette data
 _OBP0_REG    = 0xFF48    ; OBJ palette 0 data
 _OBP1_REG    = 0xFF49    ; OBJ palette 1 data
 _WY_REG      = 0xFF4A    ; Window Y coordinate

Presumably it's not enough to map the bytes of the rom, but would it be feasible to add a console variant?
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