Difference between revisions of "Big Bird's Special Delivery"
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[[File:BigBirdsSpecialDelivery_Disk.jpg|thumb|Disk]] | [[File:BigBirdsSpecialDelivery_Disk.jpg|thumb|Disk]] | ||
+ | |||
+ | [[File:BigBirdsSpecialDelivery_rakki_a_dos_r1.png|thumb|Side 0]] | ||
<gallery> | <gallery> | ||
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File:BigBirdsSpecialDelivery_game.bmp|Game | File:BigBirdsSpecialDelivery_game.bmp|Game | ||
</gallery> | </gallery> | ||
+ | |||
+ | From Aki Sivula. | ||
Load with '''LOAD":*",8,1''' then run with '''SYS32768''' | Load with '''LOAD":*",8,1''' then run with '''SYS32768''' | ||
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[[File:BigBirdsSpecialDelivery_Rakki_s1.g64]] | [[File:BigBirdsSpecialDelivery_Rakki_s1.g64]] | ||
+ | |||
+ | == Source 2 == <!--T:2--> | ||
+ | |||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | ! Property !! Data | ||
+ | |- | ||
+ | | Title || Big Bird's Special Delivery | ||
+ | |- | ||
+ | | Publisher and/or Developer || Hi-Tech Expressions, Children's Television Workshop | ||
+ | |- | ||
+ | | Year || 1987 | ||
+ | |- | ||
+ | | Disk(s) || 1 | ||
+ | |- | ||
+ | | Number of Index Holes || ? | ||
+ | |- | ||
+ | | Media Type || 5.25 DSDD | ||
+ | |- | ||
+ | | Retail, Budget or Compilation (with name) || Budget? | ||
+ | |- | ||
+ | | Country of Release || US | ||
+ | |- | ||
+ | | Language(s) || English | ||
+ | |- | ||
+ | | Platform || C64 | ||
+ | |- | ||
+ | | NTSC or PAL || PAL/NTSC | ||
+ | |- | ||
+ | | Protection || None | ||
+ | |- | ||
+ | | Working? || Yes | ||
+ | |- | ||
+ | | Archived || C64PP | ||
+ | |- | ||
+ | | Verified by || parser | ||
+ | |} | ||
+ | |||
+ | [[File:BigBirdsSpecialDelivery_loader.bmp|thumb|Loader]] | ||
+ | |||
+ | ===== Analysis ===== | ||
+ | |||
+ | Compared to Source 1 this version has a '''Autostart loader "CTW"''' added that loads '''basic program "HTE"'''. | ||
+ | HTE shows a screen centered loading message and loads '''"BT7"''' at $1000, which shows a full screen petscii loading screen and loads '''"BIGBIRD"'''. | ||
+ | With a small start routine at $1080 the code of the main program is patched: | ||
+ | |||
+ | at $8CEE JSR $973B is replaced by BIT $973B. This routine would display the CBS Software Logo. | ||
+ | |||
+ | at $8D15 JSR $87E1 is replaced by BIT $87E1. This routine would wait after the CBS Software Logo is shown. | ||
+ | |||
+ | at $8610 RTS is patched in. This reduced the wait time of the credits screen, basically skipping it. | ||
+ | |||
+ | The file '''"SBC"''' is a basic program like '''"HTE"''', but loads and starts '''"BIGBIRD"''' directly, | ||
+ | |||
+ | ===== G64 ===== | ||
+ | |||
+ | [[File:big_bird's_special_delivery-cbs_hitech_1987-.g64]] |
Latest revision as of 15:31, 12 April 2020
Source 1
Property | Data |
---|---|
Title | Big Bird's Special Delivery |
Publisher and/or Developer | Children's Computer Workshop Inc. |
Year | 1984 |
Disk(s) | 1 |
Number of Index Holes | 1 |
Media Type | 5.25 DSDD |
Retail, Budget or Compilation (with name) | Retail |
Country of Release | US |
Language(s) | English |
Platform | C64 |
NTSC or PAL | PAL/NTSC |
Protection | None |
Working? | Yes |
Archived | 15 Oct 2014 Rakki |
Verified by | enigma |
From Aki Sivula.
Load with LOAD":*",8,1 then run with SYS32768
Streams
File:Streams BigBirdsSpecialDelivery Rakki.zip
G64
File:BigBirdsSpecialDelivery Rakki s0.g64
Disk side 1 is empty.
File:BigBirdsSpecialDelivery Rakki s1.g64
Source 2
Property | Data |
---|---|
Title | Big Bird's Special Delivery |
Publisher and/or Developer | Hi-Tech Expressions, Children's Television Workshop |
Year | 1987 |
Disk(s) | 1 |
Number of Index Holes | ? |
Media Type | 5.25 DSDD |
Retail, Budget or Compilation (with name) | Budget? |
Country of Release | US |
Language(s) | English |
Platform | C64 |
NTSC or PAL | PAL/NTSC |
Protection | None |
Working? | Yes |
Archived | C64PP |
Verified by | parser |
Analysis
Compared to Source 1 this version has a Autostart loader "CTW" added that loads basic program "HTE". HTE shows a screen centered loading message and loads "BT7" at $1000, which shows a full screen petscii loading screen and loads "BIGBIRD". With a small start routine at $1080 the code of the main program is patched:
at $8CEE JSR $973B is replaced by BIT $973B. This routine would display the CBS Software Logo.
at $8D15 JSR $87E1 is replaced by BIT $87E1. This routine would wait after the CBS Software Logo is shown.
at $8610 RTS is patched in. This reduced the wait time of the credits screen, basically skipping it.
The file "SBC" is a basic program like "HTE", but loads and starts "BIGBIRD" directly,