Just found the best undocumented Z80 instruction:
DD7F is LD a, a - it copies the contents of the A register into the A register and does not impact any of the flags.
Who knows what's actually happening inside of the chip at that point. 😅
Thomas Sturm /
npub12e…pptnh
2024-05-13 02:23:39
Author Public Key
npub12e7vyfj24fa7unxf2mlaja2nvztg69j8ksgwl70uvgkexu0pem2qkpptnhPublished at
2024-05-13 02:23:39Event JSON
{
"id": "41f09bca9d92f83cceace80dff4142ea73d73f78b27f6be7c465de5479633f20",
"pubkey": "567cc2264aaa7bee4cc956ffd9755360968d1647b410eff9fc622d9371e1ced4",
"created_at": 1715567019,
"kind": 1,
"tags": [
[
"proxy",
"https://famichiki.jp/@tsturm/112431400179149066",
"web"
],
[
"proxy",
"https://famichiki.jp/users/tsturm/statuses/112431400179149066",
"activitypub"
],
[
"L",
"pink.momostr"
],
[
"l",
"pink.momostr.activitypub:https://famichiki.jp/users/tsturm/statuses/112431400179149066",
"pink.momostr"
]
],
"content": "Just found the best undocumented Z80 instruction:\nDD7F is LD a, a - it copies the contents of the A register into the A register and does not impact any of the flags.\n\nWho knows what's actually happening inside of the chip at that point. 😅",
"sig": "612c4ea594570b127c2a30c879c2f9a7c2b2cfb4bfbb381f5a36987411797994572b6c8073886f6df35929a5367925cea816a92b8c22215d3bb25fc790bbfb51"
}