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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...
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. ...
- 03 Dec 2013 00:26
- Forum: GENERAL DISCUSSIONS
- Topic: "The Source" - Second Printing, now taking orders . . . .
- Replies: 12
- Views: 4601
I'm still interested. Same deal as before?
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...
@ 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...
- 18 Nov 2013 21:15
- Forum: HARDWARE
- Topic: A great new MTX Add-on, created by Martin Allcorn
- Replies: 4
- Views: 2332
Maybe he's just shy!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,
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.
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.Crazyboss wrote:the Acorn Emulator must be this: http://www.mtxworld.dk/mtxfiles/mtx.arc
Scary really, the date stamp on the source code is over 14 years old!
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...