My 7800 Vertical Shooter - Heofonfīr

[fultonbot]

On 6/13/2020 at 1:29 PM, RevEng said:

There aren't any high level string commands. You can plot any string of characters with plotchars. Unlike interpreted basics, 7800basic is meant to be as lean and fast as possible. In terms of low-level string manipulation, there's memset and memcpy, and roll-your-own with memory arrays and loops.

This is why I love it.

[SlidellMan]

I finally made a Game Over screen for 

Heofonfīr and even provided ROMs and sources. Merely taking it one thing at a time.

Game Over Screen Demo 5-25-2021.zip Game_over_demo.bas.a78 Game_over_demo.bas.bin

[SlidellMan]

Here's an update with the proper palette.

Game Over Screen Demo 5-26-2021.zip Game_over_demo.bas.a78 Game_over_demo.bas.bin Game_over_demo.bas.list.txt

[SlidellMan]

I think the upcoming shot routine will use a for/next loop. At least it would alleviate the wraparound shot problem.

[SlidellMan]

I thought I would try again with the layered sprites, but now I just end up with a completely yellow display.

Lucelia Demo 6-4-2021.zip Vertical Shooter 6-4-2021.zip Lucelia_Movement_demo.bas.a78 Lucelia_Movement_demo.bas.bin Lucelia_Movement_demo.bas.list.txt

[RevEng]

Here's the relevant excerpt from the yellow screen of death section of the manual...

Quote

You've somehow managed to begin executing data, rather than program code. This can happen if you return from a routine you didn't gosub to, or if you trigger bankswitching accidentally by writing to the bankswitch hotspot. It's possible to turn off this protection with the set breakprotect off statement, but you should figure out the reason the protection was tripped in the first place.

 

[SlidellMan]

How foolish of me to not pick up that sooner. Oh well, lesson learned I guess...

Next step, to get the sprites to animate properly.

[SlidellMan]

Here's the updated ROMs and sources.

Lucelia_Movement_demo.bas.a78 Lucelia_Movement_demo.bas.bin Lucelia_Movement_demo.bas.list.txt Vertical Shooter 6-5-2021.zip New_Vertical_Shooter_Rewrite3.78b.a78 New_Vertical_Shooter_Rewrite3.78b.bin New_Vertical_Shooter_Rewrite3.78b.list.txt Lucelia Demo 6-5-2021.zip

[SlidellMan]

I thought it was time to rewrite that vertical test shooter, but upon compiling:

Cannot open includes.7800 for reading

Vertical Shooter 6-26-2021.zip

[SlidellMan]

Here's the latest source.

Vertical Shooter 7-6-2021.zip

[SlidellMan]

I fixed up numerous unresolved symbols.

Vertical Shooter 7-7-2021.zip

[fultonbot]

16 minutes ago, SlidellMan said:

I fixed up numerous unresolved symbols.

Vertical Shooter 7-7-2021.zip 20.78 kB · 2 downloads

I could not get this to load.  What emulator are you using?

[SlidellMan]

A7800, and that's just the source code. I was unable to compile due to an includes error.

[SlidellMan]

Here's the latest source.

Vertical Shooter 7-8-2021.zip

[SlidellMan]

Now with DMAhole adjustments and new variables dimmed.

Vertical Shooter 7-9-2021.zip

[BydoEmpire]

Is there an updated .bin, or is the June 5 version the latest?

[SlidellMan]

The June 5th version is the latest .bin, and I've been trying to compile the latest source, and weeding out bugs in the code. Currently, I'm trying to fix some Unresolved Symbol problems with the fourth rewrite.

[SlidellMan]

New demo, and it finally compiled. Now to get it to stop freezing upon moving the joystick.

Vertical Shooter 7-21-2021.zip New_Vertical_Shooter_Rewrite4.78b.a78 New_Vertical_Shooter_Rewrite4.78b.bin New_Vertical_Shooter_Rewrite4.78b.list.txt

[SlidellMan]

Well, I decided to get back to work and upon compiling, get this error:

--- Unresolved Symbol List

interrupthold            0000 ????         (R )

 

   stack allowance: 20 nested subroutines.

   the canary is situated at: $1c1

   6956 bytes of ROM space left in the main area of bank 1.

     $2235 to $27ff was claimed as extra DL memory.

     $1880 to $23ff used as zone memory, allowing 48 display objects per zone.

     2334 bytes left in the 7800basic reserved area.

 

7800basic.h (80): error: EQU: Value mismatch.

7800basic.h (81): error: EQU: Value mismatch.

7800basic.h (82): error: EQU: Value mismatch.

7800basic_variable_redefs.h (142): error: EQU: Value mismatch.

7800basic_variable_redefs.h (144): error: EQU: Value mismatch.

7800basic_variable_redefs.h (146): error: EQU: Value mismatch.

 

Fatal assembly error: Source is not resolvable.

Lucelia Demo 8-18-2021.zip

[Mord]

Looks like in your source you're trying to define temp1, temp2, and temp3 variables, but those are already declared by 7800basic itself. Thus the mismatch complaints.  Would be better to just call them as mytemp1, mytemp2, and mytemp3 etc so they don't step on the temp1-temp6 variables 7800basic defines.

[SlidellMan]

I've fixed that issue in question, along with a few others.

Lucelia Demo 8-20-2021.zip Lucelia_Movement_demo.78b.a78 Lucelia_Movement_demo.78b.bin Lucelia_Movement_demo.78b.list.txt

Edited August 20, 2021 by SlidellMan
Duplicate upload error.

[SlidellMan]

Well,

 I decided to rewrite my Vertical Shooter demo, using what I have learned from @mksmith, @Muddyfunster, @Mord, @RevEng, and @SmittyB. The sources and binaries will be posted when a functioning ROM is compiled.

 

Edit: Here are the Source and Binaries as promised. So far, it runs better than V4.

Vertical Shooter 8-27-2021.zip New_Vertical_Shooter_Rewrite5.78b.a78 New_Vertical_Shooter_Rewrite5.78b.bin

Edited October 27, 2021 by SlidellMan
The New Rom and Sources are now here!

[SlidellMan]

Time for a much-needed update. While the new shooting engine is better than what got from Atarius Maximus, I still have to correct the bug that causes the bullets to come from the bottom of the screen.

New_Vertical_Shooter_Rewrite5.78b.a78 New_Vertical_Shooter_Rewrite5.78b.bin Vertical Shooter 11-8-2021.zip

[BydoEmpire]

Looks like you got the movement and shooting down, it seems to be working pretty well (on JS7800, haven't tried on bupsystem yet).  Good progress!

[+mksmith]

Great job mate! Improving with each build!!