Search found 393 matches

by Bill B
27 Jan 2024 21:29
Forum: GENERAL DISCUSSIONS
Topic: IS there any interest in.... MemoChat
Replies: 6
Views: 365

Re: IS there any interest in.... MemoChat

For MemoFest I used Skype as that allows 24h with multiple participants with no charge.

https://www.skype.com/en/free-conference-call/

You don't need any installation, you can just use the browser, but that does (I think) require using Edge, at least for the host.
by Bill B
16 Jan 2024 18:17
Forum: MFX
Topic: FPGA Firmware Reprogramming
Replies: 1
Views: 14428

Re: FPGA Firmware Reprogramming

If you have a Raspberry Pi, either a Pico or one of the Linux boards it is actually possible to reprogram the FPGA without Quartus or a USB blaster. It requires: A slightly different programming file (Raw program data, *.rpd). A custom cable. This can be made with a 10-wide DuPont cable with female ...
by Bill B
31 Oct 2023 22:54
Forum: GENERAL DISCUSSIONS
Topic: Only a week until the Retro-Comptuer Festival. Eek!
Replies: 22
Views: 357974

Re: Only a week until the Retro-Comptuer Festival. Eek!

So it would need a nice 3D printed case.
by Bill B
31 Oct 2023 22:47
Forum: GENERAL DISCUSSIONS
Topic: Only a week until the Retro-Comptuer Festival. Eek!
Replies: 22
Views: 357974

Re: Only a week until the Retro-Comptuer Festival. Eek!

I can imagine a very small adaptor PCB, which has edge contacts on one side, and a right angle edge plug on the other. The MFX board would then be on the left hand side (and upside down). The mirror image of how the CFX or CFX-II are mounted internally. It would mean that the SD card is the right wa...
by Bill B
31 Oct 2023 22:32
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

Wonder if the Tektite font here might help: https://juanitogan.itch.io/p8-programming-fonts , has a cp1252 and a cp437 version, not sure what would be better? I took a quick look at these, but I don't think they help. The MTX requires 8x10 bitmaps, which I don't think are included there. The CP850 ...
by Bill B
31 Oct 2023 22:15
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

The CTC and the PIO port were both passing mentions towards the end of the day. Perhaps why I remember them. I have made a lot of use of the CTC over the years: Both of my device programmers make use of the CTC to time the programming pulses. When I was developing my DIY Navtex receiver , the decodi...
by Bill B
29 Oct 2023 14:01
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

I hadn't thought about that. My initial interest was adding back some of the capabilities that the CFX-II has (using a Propeller chip).

It may depend on how much memory is required. The MFX has 32KB of video ram.

Do you have a reference for the MSX-2 specification?
by Bill B
29 Oct 2023 12:36
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

Other topics that were covered during the day include: EPROM & PIC programmers using printer port. History of CFX, Propeller video & CFX-II leading to MFX. Andy's read-only PROM disk emulator. MTX_Lib and the Code::Blocks GUI for developing Memotech programs in C. My implementation of a ZMac...
by Bill B
29 Oct 2023 12:29
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

One of the test boards I use while developing new firmware for the FPGA on the MFX: 20231029_100708.jpg It is a partial reproduction of the MFX, with interfaces for the video SRAM, VGA output and SD card. A Raspberry Pi Pico stands in for the Z80. Because the Pico is a 3.3v device (compared to the 5...
by Bill B
29 Oct 2023 12:04
Forum: MEMOFEST 2023
Topic: Memofest 2023, Where and When?
Replies: 53
Views: 3547171

Re: Memofest 2023, Where and When?

All of the recent Memotech storage devices (CFX, CFX-II and MFX) store the CP/M disk images as successive 8MB slices at the beginning of the storage media, perhaps followed by the HexTrain data file. This leaves the rest of the, usually much larger, storage device unusable. Also, each of the devices...