VoyForums
[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

[ Login ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, [3], 4, 5, 6, 7, 8 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 15:08:57 12/24/01 Mon
Author: Ted Leja
Subject: Re: VRAM ON 575 total 512K
In reply to: Stuart Bell 's message, "Re: VRAM ON 575 total 512K" on 10:13:11 12/24/01 Mon

Stuart:
Successs. I have returned successfully to status quo. My beautiful Trinitron has returned with the old resolution (ie) 512x384. I have a full post mortem to report, the what went wrong and why. Why? I think that my experience can be useful for others.
In my high res mod, I believe that the cutting of the link from 8 to 9 was successful. My cheap multitester confirmed the successful cut. The soldering of 8 to 10 was again properly done.
I cannot say the same with the isolation of pin 20 which had to be done because my a/b did not have J78 or J79. Really. I did not follow very well the instructions from http://www.geocities.com/edakoda/missing.htm as well as http://www.colourclassicfaq.com/general/vga.html . It seems that the cutting of pin 20 should be done between the odd and even pins on the board. Because it is a very narrow area to try to cut the pin, I was never able to cut pin 20 successfully. As a result the video would never light up.
I have a suggestion that both authors should never have anyone try to cut any pin between the odd and even set. It's much too narrow. If Pin 20 should be cut then it should be clearly identified by count it from the 2 pin in order to identify it exactly. The numbering on the board can be skewed. I suggest cutting the line from the ic?? to the pin. Cutting odd pin numbers is easy because you cut them on the side closest to the plastic card edge.
I hope that this helps and I'm now open for another Hi REs mod.

Thanks

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Replies:

Post a message:
This forum requires an account to post.
[ Create Account ]
[ Login ]
Forum timezone: GMT-8
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.