Search found 1324 matches

by Andy Rea
Fri Feb 23, 2018 6:35 pm
Forum: Hardware
Topic: Memotech HRG: ROM mirroring!
Replies: 13
Views: 268

Re: Memotech HRG: ROM mirroring!

Under normal circumstances you cannot replace the ROM at 0000-0fff with the shadow RAM because the I register needs to be set to $1E in order for the character generator to work. If you change I register then the characters on screen will be messed up, psuedo hires. This using the lower bit of the ...
by Andy Rea
Wed Feb 21, 2018 10:43 pm
Forum: Hardware
Topic: Problem with my new ZXpand+
Replies: 20
Views: 505

Re: Problem with my new ZXpand+

Its all a matter of perspective :lol:
by Andy Rea
Wed Feb 21, 2018 11:03 am
Forum: Hardware
Topic: Problem with my new ZXpand+
Replies: 20
Views: 505

Re: Problem with my new ZXpand+

Image

In centre bottom dark thing just below and to the left of the diamond shaped chip...

Regards Andy
by Andy Rea
Wed Feb 21, 2018 8:41 am
Forum: Hardware
Topic: Problem with my new ZXpand+
Replies: 20
Views: 505

Re: Problem with my new ZXpand+

Should be a capacitor near to the regulators I only mention it as my board was missing it, and it exhibited some strange behaviour and worst of all serial comms didn't work properly because of it. Regards Andy P.s. Charlie you sly fox.. Didn't realise you'd built in the ability to program the cpld a...
by Andy Rea
Tue Feb 20, 2018 11:24 pm
Forum: Welcome Area
Topic: Welcome to the SINCLAIR ZX WORLD forums
Replies: 9
Views: 254

Re: Welcome to the SINCLAIR ZX WORLD forums

Nice introduction and may I congratulate and thank the ZX-TEAM for taking on the forum.

Andy
by Andy Rea
Mon Feb 19, 2018 5:41 pm
Forum: Hardware
Topic: Problem with my new ZXpand+
Replies: 20
Views: 505

Re: Problem with my new ZXpand+

me wonders if this particular ZXpand+ is one that snuck out without that smoothing capacitor ? :roll:

Regards Andy
by Andy Rea
Sun Feb 18, 2018 3:03 pm
Forum: Development
Topic: Plot function in z88dk
Replies: 28
Views: 1055

Re: Plot function in z88dk

Tron trails does a bit of plotting.. .
by Andy Rea
Sat Feb 17, 2018 9:35 pm
Forum: Development
Topic: Plot function in z88dk
Replies: 28
Views: 1055

Re: Plot function in z88dk

what you want there is 2 frame video buffer , 1 for odd x positions and 1 for even x positions then you only need to scroll everything left and update the last 2 quarter block columns, the LDIR block move should be quick enough for 3 character lines ( 6 block pixels) dont forget to make sure the new...
by Andy Rea
Sat Feb 17, 2018 3:50 pm
Forum: Emulators
Topic: New release of EightyOne available
Replies: 134
Views: 10689

Re: New release of EightyOne available

Fruitcake wrote:
Sat Feb 17, 2018 2:05 pm

It might be that the dialog is being displayed but is just appearing off screen. If so then with TV Emulation ticked try: View > Gather Windows
exactly this worked for me, Thanks Paul.

Regards Andy
by Andy Rea
Sat Feb 17, 2018 10:33 am
Forum: Welcome Area
Topic: ANDRE*** is back!
Replies: 13
Views: 371

Re: ANDRE*** is back!

Welcome back to the mad house world of ZX81