Search found 453 matches

by Martin A
13 Dec 2013 11:40
Forum: MAGROM
Topic: Who wants a MAGROM board?
Replies: 21
Views: 8567

Re: Who wants a MAGROM board?

There's an nice bonus that comes with using your mods to the circuit. I don't need to store the extra 3 shadow copies of the ROM 7 code that were required to "fix" the original prototype. That's 24k more game space! I've currently got 38 games squeezed in, it's now just about reached the limits of o...
by Martin A
08 Dec 2013 18:51
Forum: MAGROM
Topic: Who wants a MAGROM board?
Replies: 21
Views: 8567

Re: Who wants a MAGROM board?

V5 is built and lightly tested, it seems to be working fine. It's now down to 6 chips. It has all of Mark's suggestions implemented, plus *grom instead of the 74xx138 doing rom 7 detection. The MTX500 I tested it on has one of Andy's Rememorizor PAL's fitted, but that shouldn't make any difference. ...
by Martin A
06 Dec 2013 11:50
Forum: GENERAL DISCUSSIONS
Topic: It's a bit quiet in here...
Replies: 3
Views: 1575

Re: It's a bit quiet in here...

Aye, well Dave has me slaving away over the MAGROM software.

Maybe he'll allow me a few days rest before making me start on the V5 prototype :)
by Martin A
03 Dec 2013 00:26
Forum: GENERAL DISCUSSIONS
Topic: "The Source" - Second Printing, now taking orders . . . .
Replies: 12
Views: 4601

Re: "The Source" - Second Printing, now taking orders . . .

I'm still interested. Same deal as before?
by Martin A
03 Dec 2013 00:23
Forum: MAGROM
Topic: Who wants a MAGROM board?
Replies: 21
Views: 8567

Re: Who wants a MAGROM board?

Shhhhh Don't tell Dave, who I've just sent the V4 schematic to, that I I'm looking at doing a V5 board with all these suggestions included. Though for ROM protection would ORing the ROM chip-select with *RE/CPM not be more logical ? that way if the ram only mode is set, them the ROM can never be sel...
by Martin A
30 Nov 2013 12:46
Forum: MAGROM
Topic: Who wants a MAGROM board?
Replies: 21
Views: 8567

Re: Who wants a MAGROM board?

@ Mark, Replacing the 74xx20 and 74xx138 with a 74xx30 and one of the unused gated on 74xx32 seems so obvious now you've mentioned it. The trick with the 74HCT374 and the resistor pack, just shows the huge gaps in my knowledge, I just mirrored the paging system Memotech used. One thing I was curious...
by Martin A
18 Nov 2013 21:15
Forum: HARDWARE
Topic: A great new MTX Add-on, created by Martin Allcorn
Replies: 4
Views: 2332

Re: A great new MTX Add-on, created by Martin Allcorn

Dave wrote:Martin has designed a great new add-on for the MTX, as he appears to be "hiding his light under a bushel" at the moment,
Maybe he's just shy!

BTW Either the copy of Tachyon fighter is corrupt, or it needs to come off that list, I have a proper look at it at the weekend.
by Martin A
17 Nov 2013 00:22
Forum: INTRODUCE YOURSELF
Topic: Another MTX oldie
Replies: 3
Views: 2280

Re: Another MTX oldie

Crazyboss wrote:the Acorn Emulator must be this: http://www.mtxworld.dk/mtxfiles/mtx.arc :)
Yup that's it, pretty much the "latest" version too. I only ever had one bug report when I had it online, and that was the update with the fix.

Scary really, the date stamp on the source code is over 14 years old!
by Martin A
16 Nov 2013 14:53
Forum: INTRODUCE YOURSELF
Topic: Another MTX oldie
Replies: 3
Views: 2280

Another MTX oldie

Hello! I brought my first Memotech at the end of 1983. Which ended up as a full twin disc FDX. I wrote the "Bomber" game that appears on Dave and Andy's sites (and maybe others) At one time there were 4 of us in the family with MTX's so between us we had a fairly comprehensive collection of software...
by Martin A
16 Nov 2013 14:26
Forum: REMEMOrizer
Topic: 48 line mode?
Replies: 23
Views: 7540

Re: 40 line mode?

Try CRTL-F CTRL-G <enter> for white on black at the CPM prompt