Search found 691 matches
- 01 Apr 2024 11:41
- Forum: NEW HARDWARE
- Topic: System test rom/Board
- Replies: 32
- Views: 34817
Re: System test rom/Board
Sounds like you're building something like : https://www.mtxworld.dk/memorum/viewtopic.php?p=3299#p3299 Writing Z80 code to run with no working ram needs a few "tricks" so while I've posted the early versions to show how it's done. I refrained from publising the final code. So disassemblin...
- 31 Mar 2024 21:37
- Forum: NEW HARDWARE
- Topic: System test rom/Board
- Replies: 32
- Views: 34817
Re: System test rom/Board
Answers in order: Build 234, no copies of that source remain. Build 245, the source for that is on the Raspberry Pi Z80 dev system here somwhere. However, it needed a purpose written assembler to build. All the tricks and tweaks needed to run with no ram were written into the assembler as multibye a...
- 06 Mar 2024 11:43
- Forum: MFX
- Topic: MFX with a difference
- Replies: 18
- Views: 554
Re: MFX with a difference
The bright yellow labels are a bit subtle I guess .... True, but you mad tinkerers stick labels on anything and everything :lol: [has a quick check of the Dev MTX] There's only 6 labled chips: The 3 system ROMs The motherboard PAL replacement, currently the MTX500 GAL is fitted, there's a MTX512 ve...
- 05 Mar 2024 18:17
- Forum: MFX
- Topic: MFX with a difference
- Replies: 18
- Views: 554
- 05 Mar 2024 12:21
- Forum: MFX
- Topic: MFX with a difference
- Replies: 18
- Views: 554
Re: MFX with a difference
You haven't a hope in hell of getting the case back together? Absolutely not. That's where the PS2 keyboard interfacre really comes in to it's own :) That MTX is one Memotech altered in the factory to use eprom instead of mask rom. So I have an alternate set of eproms fitted** that has the keyboard...
- 05 Mar 2024 12:01
- Forum: MFX
- Topic: MFX with a difference
- Replies: 18
- Views: 554
Re: MFX with a difference
It is indeed a larger FPGA, it's a Cyclone 4 device EP4C6E which has 30k of onboard ram. That's compared to 13k ram on the Cyclone 2 EP2C5. The original build MFX used the internal ram for the 80 column board memory, plus buffers for the sprite rendering on the VDP. The external chip was used for th...
- 04 Mar 2024 14:24
- Forum: MFX
- Topic: MFX with a difference
- Replies: 18
- Views: 554
MFX with a difference
See anything different about the MFX board in the photos?
- 25 Feb 2024 15:20
- Forum: HARDWARE
- Topic: MFX Availability
- Replies: 8
- Views: 333
Re: MFX Availability
I'll give him a poke on your behalf too
- 25 Feb 2024 14:53
- Forum: HARDWARE
- Topic: MFX Availability
- Replies: 8
- Views: 333
Re: MFX Availability
Send Dave an e-mail using the link at the bottom of http://primrosebank.net/computers/mtx/p ... _order.htm
The page seems to suggest there are boards available from the last batch I built for him
The page seems to suggest there are boards available from the last batch I built for him
- 18 Feb 2024 21:14
- Forum: MFX
- Topic: MFX GAL Update to support MAGROM
- Replies: 4
- Views: 213
Re: MFX GAL Update to support MAGROM
I probably should add you also need a rememorizor compatible Magrom, which the early ones weren't without patch wires.. Can you point out how to tell the difference, so that people know how to tell them apart. Mark Dave has all the info in his site (of course) http://primrosebank.net/computers/mtx/...