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| author | Miquel Sabaté Solà <msabate@suse.com> | 2023-11-01 09:20:03 +0100 |
|---|---|---|
| committer | Miquel Sabaté Solà <mikisabate@gmail.com> | 2025-02-04 20:59:14 +0100 |
| commit | 988332816972638adfa8000dd7e1a474c5fea424 (patch) | |
| tree | 9f5589df5652ce9f8b40b681cbe1b78a7a020646 /basics/persist.s | |
| parent | c22ea7b25d8949f1c6266208eeb027d0350a54a7 (diff) | |
| download | code.nes-988332816972638adfa8000dd7e1a474c5fea424.tar.gz code.nes-988332816972638adfa8000dd7e1a474c5fea424.zip | |
basics: Improve documentation
Add more comments to `sprite.s` and `persist.s` so they can be read by a
newcomer, and also introduce a README for this directory.
Signed-off-by: Miquel Sabaté Solà <msabate@suse.com>
Diffstat (limited to 'basics/persist.s')
| -rw-r--r-- | basics/persist.s | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/basics/persist.s b/basics/persist.s index 1dcfa29..392797f 100644 --- a/basics/persist.s +++ b/basics/persist.s @@ -103,10 +103,10 @@ reset_mmc1: ;; That's why it did not really matter what we had at the iNES ;; header: mirroring is programmatically set, not ;; hardware-bound. - ;; - bit 2: we have two regions: $8000-$BFFF and $C000-$FFFF. This bit - ;; configures which one of them is fixed and which can be - ;; swapped. We set this bit to one, meaning that $8000-$BFFF is - ;; swappable while the other is fixed to the last bank of PRG. + ;; - bit 2: we have two regions (see bit 3): $8000-$BFFF and $C000-$FFFF. + ;; This bit configures which one of them is fixed and which can + ;; be swapped. We set this bit to one, meaning that $8000-$BFFF + ;; is swappable while the other is fixed to the last bank of PRG. ;; - bit 3: swappable PRG size. If set to 0, then 32KB of memory is ;; assumed, and thus bit 2 is ignored (i.e. the whole thing is to ;; be swapped at once). Otherwise, if set to 1, then 16KB is |