Search found 18 matches

by FelisSapien
Fri Jul 05, 2019 9:10 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

It sounds so reasonable when you put it that way! ;) I'll have a read up on how I might read a 23128. It doesn't look as though my programmer supports that directly. It's a TL866II+, btw What I was considering was flashing a new (EP)ROM making further board mods to support it. The modifications don'...
by FelisSapien
Thu Jul 04, 2019 3:44 pm
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

Quick update... Changed the ULA and didn't see any obvious difference. Got bold and inserted the lower RAM. On power up I'm treated to a new pattern of dancing squares. Tested continuity on the RAM sockets and found a couple of issues. Need to check out the ROM socket now. There's also the possibili...
by FelisSapien
Wed Jul 03, 2019 6:33 pm
Forum: Sinclair Miscellaneous
Topic: I handed over dosh and today I acquired...
Replies: 5
Views: 481

Re: I handed over dosh and today I acquired...

Here's my latest haul... I was looking for another rubber keyboard Spectrum for spares and came across an auction for a 48k Spectrum with Extras. It was collection only but fortunately local. Made an opening bid and... no one else seemed to notice. All mine for £25 Here's what I collected... The Spe...
by FelisSapien
Wed Jul 03, 2019 8:24 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

The photograph evidence shall be produced within three working days. By order! Here's the hardware... https://i.postimg.cc/1VxRW09W/spec4A.jpg Over on the AtariAge forum there's a long running 'stuff I've recently acquired' thread. Is there something similar around these parts? Now using the CRT TV...
by FelisSapien
Tue Jul 02, 2019 8:10 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

I've changed the permissions on the YT videos... silly me :roll: I'm pretty sure my CRT can be set PAL or AUTO. Will retest with PAL. I've received the DIL sockets I was waiting for so will pop those in place for the removed chips. I can then start to play a bit more. Yesterday I also acquired a rev...
by FelisSapien
Sun Jun 30, 2019 10:37 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

Would've edited the above post but it's not letting me Got a little more time with this. Not sure what I was seeing re the 12V. Had things set up for a while now and all voltages seem stable. On the AC measurements I see nothing on pin 1. Pin 8 = 0.045V. Pin 9 = 0.001V. The values show the upper rea...
by FelisSapien
Sun Jun 30, 2019 6:41 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

Ok, ok... ROM out and memory removed. Things seem a little more chaotic (as predicted) Here we have the machine connected to the LCD as previous https://youtu.be/OS4Eh4dy5ac Now on a CRT monitor - excuse the flicker https://youtu.be/Icx4MKvTMDg When I first connected to the CRT it too struggled to k...
by FelisSapien
Fri Jun 28, 2019 8:56 am
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

Thanks for the thoughts and advice. Very much appreciated!

Doubt I'll get a chance today but hopefully over the weekend I'll whip out the chips (lower RAM & ROM) ready for socketing. Will test more then... and with a CRT monitor.

Cheers!
by FelisSapien
Wed Jun 26, 2019 9:10 pm
Forum: Hardware
Topic: 48k issue 2 crash/reset at idle
Replies: 21
Views: 1355

Re: 48k issue 2 crash/reset at idle

The video issue goes a little like this... https://youtu.be/hMdqWx9PMS8 The video doesn't really show the screen 'noise' that pulses along with the flicker. Towards the end you'll also see the crash I describe. This output is pretty consistent on the LCDs screens I have within easy reach. I could al...
by FelisSapien
Mon Jun 24, 2019 7:49 pm
Forum: Games/Software
Topic: The best Speccy game by Ultimate: discussion
Replies: 28
Views: 1666

Re: The best Speccy game by Ultimate: discussion

Tough one. My instant reaction is Sabrewulf. But the game that I got along with my 16k Speccy was Jet Pac. That’s a tough act to follow.