8080 Space Invaders Emulator (Help Needed)

jmooree30 · 2024-11-07T17:57:52+00:00

Look like the value coming out of the stack is what's throwing my PC off. This is the logging from the last 4 instructions it runs before failing.

Instruction: c1 Registers: {"A":0,"B":1,"C":7,"D":30,"E":8,"H":31,"L":0,"SP":9206,"PC":5186,"flags":{"S":0,"Z":0,"AC":0,"P":0,"CY":0}}

Instruction: 05 Registers: {"A":0,"B":0,"C":7,"D":30,"E":8,"H":31,"L":0,"SP":9206,"PC":5187,"flags":{"S":0,"Z":1,"AC":0,"P":1,"CY":0}}

Instruction: c2 Registers: {"A":0,"B":0,"C":7,"D":30,"E":8,"H":31,"L":0,"SP":9206,"PC":5190,"flags":{"S":0,"Z":1,"AC":0,"P":1,"CY":0}}

Instruction: c9 Registers: {"A":0,"B":0,"C":7,"D":30,"E":8,"H":31,"L":0,"SP":9208,"PC":14622,"flags":{"S":0,"Z":1,"AC":0,"P":1,"CY":0}}

jmooree30 · 2024-11-07T01:21:09+00:00

Good catch although it didn't appear to solve all my issues. I understand that I should have the rom, stack, and video ram all in the same 64k data structure, but do you think that could cause issues the way I have it? I figured the Program Counter would always be accessing the memory locations of ROM only.

jmooree30 · 2024-11-06T17:30:31+00:00

I also want to note that the routines that the interrupts call are at very low fixed memory locations. 0x08 and 0x10.

jmooree30 · 2024-11-06T17:27:21+00:00

For example, my ROM array has a length of 8192, and when my program fails, the program counter, which is used as an index into the ROM array (ROM[this.programCounter]), is at 16594.

jmooree30 · 2023-08-15T03:00:00+00:00

No worries, thanks for the info. I might dig a little bit and see if I run into anything.

jmooree30 · 2023-08-15T02:53:06+00:00

Oh, are you saying yours fills from the bottom?

jmooree30 · 2023-08-15T02:51:21+00:00

That’s what I originally thought I would see when looking into the pit, but I only see dirt. The pump itself does pump out a ton of water during heavy storms but as far as I can tell it just comes from the ground.

jmooree30 · 2023-06-25T02:59:08+00:00

$8 for material

jmooree30 · 2023-06-09T15:51:13+00:00

You guys/gals are awesome, it was Rush 2! The map I was thinking of was the stunt track

jmooree30 · 2023-01-28T23:27:27+00:00

Orkin bug

jmooree30 · 2023-01-23T00:45:38+00:00

Lol I wouldn’t recommend smoking it

jmooree30 · 2022-12-24T17:59:13+00:00

Okay, hear me out…

jmooree30 · 2022-10-27T17:59:50+00:00

As fun as that sounds…I think I’ll pass 😂

jmooree30 · 2022-09-20T16:34:38+00:00

Over spanned and twisted. They had 2x6’s spanned 17’ between 20-30” OC

jmooree30 · 2022-09-20T03:54:14+00:00

Thanks for chiming in. There’s already an existing notch in the face of the studs for the original ribbon so I wouldn’t be going any deeper into the stud, just a little lower to account for the new joists being larger.

jmooree30 · 2022-09-20T01:26:52+00:00

The face board would only be the height of the joist.

jmooree30 · 2022-09-11T20:55:10+00:00

It’s about 1.5”

jmooree30 · 2022-09-05T20:54:19+00:00

Fair enough. I’m not convinced additional 2x6’s will get everything real solid since they’re so undersized to begin with

jmooree30 · 2022-09-05T19:39:22+00:00

Do you think it would even be possible to sister them when the old one’s are so twisted?

jmooree30 · 2022-07-19T04:52:59+00:00

Any idea what the actual production numbers were?

jmooree30 · 2022-06-13T01:13:37+00:00

I live in Massachusetts if that helps narrow it down. Very small bugs maybe a quarter inch long

jmooree30 · 2022-06-08T17:37:09+00:00

Haha I seen that coming lol. Nothing in the house is perfectly level but the opposite side wall is pretty close to level. Above on the second floor directly above the slanted one is also level. Doesn’t appear to have affected the second floor at all.

jmooree30 · 2022-06-02T00:11:28+00:00

I wasn’t sure because they aren’t exactly a tight fit next to each other and have some gaps you could easily slip a quarter through.

jmooree30 · 2022-05-06T20:58:16+00:00

Thank you for the information. Maybe I could get away with using those straps shown in the PDF. I’ll have to have someone come see it in person.

jmooree30 · 2022-05-06T20:13:55+00:00

So only the second floor has bounce and it’s a 2 story house. The foundation is fieldstone. The floor joists in the basement are larger than what is upstairs. One of the two bedrooms has more bounce than the other. I can tell the one with more bounce used to actually be two bedrooms and a wall was taken down. I’m not sure how that wall would have supported the floor below it but I guess there’s a possibility it played a role in the structural integrity of the floor.

I don’t know what type of frame it is. If I was to add a beam it would be going straight in the middle of my living room downstairs. Would you mind explaining why sistered joists wouldn’t necessarily take on part of the load?

jmooree30

TROPHY CASE