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| author | Miquel Sabaté Solà <mssola@mssola.com> | 2026-04-02 14:40:12 +0200 |
|---|---|---|
| committer | Miquel Sabaté Solà <mssola@mssola.com> | 2026-04-02 14:40:12 +0200 |
| commit | cb1111055f7b03989daac63675d27bfd156a4e21 (patch) | |
| tree | a3038f24c830b053dc7b63e7935f63e0bd50f7b3 /src | |
| parent | ba2711cb490c26e05c1b8f6cd3e1d081309d15fd (diff) | |
| download | jetpac.nes-cb1111055f7b03989daac63675d27bfd156a4e21.tar.gz jetpac.nes-cb1111055f7b03989daac63675d27bfd156a4e21.zip | |
Cycle the kind of shuttle to be used
In preparation to having multiple kinds of shuttles as in the original
game, introduce the 'Globals::zp_shuttle_kind' variable, which is just a
helper value by masking out the 'Globals::zp_level' variable. This in
turn will be the index for selecting which tile IDs for each shuttle
part.
Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/driver.s | 5 | ||||
| -rw-r--r-- | src/jetpac.s | 6 |
2 files changed, 11 insertions, 0 deletions
diff --git a/src/driver.s b/src/driver.s index b367c63..9d31604 100644 --- a/src/driver.s +++ b/src/driver.s @@ -885,6 +885,11 @@ lda Globals::zp_level and #%00000111 sta Globals::zp_level_kind + lda Globals::zp_level + and #%00001100 + lsr + lsr + sta Globals::zp_shuttle_kind ;; Just like we did in Drivers::switch(), we re-initialize some things ;; like timers and the items. Note that re-setting the timers will force diff --git a/src/jetpac.s b/src/jetpac.s index 5716be8..b9e6311 100644 --- a/src/jetpac.s +++ b/src/jetpac.s @@ -153,9 +153,15 @@ sta Globals::zp_level and #%00000111 sta Globals::zp_level_kind + lda #LEVEL + and #%00001100 + lsr + lsr + sta Globals::zp_shuttle_kind .else sta Globals::zp_level sta Globals::zp_level_kind + sta Globals::zp_shuttle_kind .endif ;; Initialize the assets for the game. If the first sprite is not |