Dragon's Lair Fans - Arcade Lifestyle

General Chat => Technical Area => Topic started by: vernimark on December 29, 2015, 01:50:46 AM

Title: midway space invaders
Post by: vernimark on December 29, 2015, 01:50:46 AM: Any idea?

Ram test
https://youtu.be/hXFsMS9gBOQ
Title: Re: midway space invaders
Post by: spectroman on December 29, 2015, 07:32:20 PM: Hi marco,

you can flash my modified test rom http://www.outerworldarcade.com/arcade/space_invaders/space_invaders_test_rom.html
http://www.outerworldarcade.com/arcade/space_invaders/tst_invd.zip

and put it on H socket
Title: Re: midway space invaders
Post by: vernimark on January 13, 2016, 01:12:49 PM: thank you!
I've another question.

I have 2 sound boards.
Using one sound board with a working cpu board I have no problems,
using the other sound board the game resets continuously. I can see the first game frames correctly but then resets.
Title: Re: midway space invaders
Post by: vernimark on January 15, 2016, 01:02:43 PM: ok, the board reset because of the 74161 on the sound board, position D2 was faulty (reset circuit)

JUST A NOTE
some schematics invert the SOUCER HIT and the INVADER HIT sound circuits so pay attention what you are working on
Title: Re: midway space invaders
Post by: spectroman on January 18, 2016, 04:46:03 AM: cool,

the 74161 is a part of the watchdog timer, I've found it faulty on some board.
Title: Re: midway space invaders
Post by: vernimark on January 21, 2016, 03:24:36 PM: yep.
I bought a couple of SI Deluxe boardsets
One has the label "U.R", I'm wondering what difference has with the cocktail version
Title: Re: midway space invaders
Post by: vernimark on January 26, 2016, 10:17:13 AM: Quote from: spectroman on January 18, 2016, 04:46:03 AM
you can flash my modified test rom http://www.outerworldarcade.com/arcade/space_invaders/space_invaders_test_rom.html
http://www.outerworldarcade.com/arcade/space_invaders/tst_invd.zip

Thank you. I'm working on another SI DX board and I've some questions.

- I downloaded your BINs and burned them into regular intel 2716, then I set the jumper in order to support 9316, right?
- Have I to use all 4 images or test.h only?
- Does these roms work on SI DX hardware too?

I suspect something else doesn't work because your test doesn't start.

thank you
Title: Re: midway space invaders
Post by: spectroman on January 27, 2016, 06:03:43 PM: Quote from: vernimark on January 26, 2016, 10:17:13 AM
Thank you. I'm working on another SI DX board and I've some questions.

- I downloaded your BINs and burned them into regular intel 2716, then I set the jumper in order to support 9316, right?

I use this jumper setting

(http://gamoovernet.pixhotel.fr/pics_gamoovernet690px/20130821234054-spectroman-IMG-20130821-202244.jpg) (http://gamoovernet.pixhotel.fr/pics/20130821234054-spectroman-IMG-20130821-202244.jpg)

Quote from: vernimark on January 26, 2016, 10:17:13 AM
- Have I to use all 4 images or test.h only?

Only the test.h is needed. But if you want to check the crc32 of the roms E F G you must install it.

Quote from: vernimark on January 26, 2016, 10:17:13 AM
- Does these roms work on SI DX hardware too?

I'll think but I haven't test it.

Quote from: vernimark on January 26, 2016, 10:17:13 AM
I suspect something else doesn't work because your test doesn't start.

With a correct jumper setting, a good clock, power supply & reset the rom should start.
Title: Re: midway space invaders
Post by: vernimark on January 28, 2016, 11:22:00 AM: thank you for your answers.
probably I have a problem with my eprom programmer because after few minutes I burn the eprom it fails the verification.

anyway I decided a "brute force" approach and I replaced most of the RAMs and now the board works.

Anyway I have to repair another boardset so your test rom will be use soon :D