Search found 150 matches

by PiyoTaro
Thu May 23, 2019 5:31 pm
Forum: ZX Spectrum (and Clones)
Topic: Design a small Sound card for Next
Replies: 12
Views: 1302

Do not work!/Re: Design a small Sound card for Next

My "layout diagram" drawn in 2.54mm increments without understanding the "layer" was manufactured as a double-sided printed circuit board. The cost is $19.(Photo. May 17) (The article continues) PCB board module does not work (Photo. May 17) 20190523_20190517mypcb_top.jpg 20190523_20190517mypcb_bot...
by PiyoTaro
Thu May 23, 2019 5:22 pm
Forum: ZX Spectrum (and Clones)
Topic: Design a small Sound card for Next
Replies: 12
Views: 1302

Re: Design a small Sound card for Next

This project aims at a small FM sound card that can be put on the pin header terminal CN5 (on the ZX Spectrum Next board) . Prototype the FM sound module. --- I mounted the components on the board at last weekend. Compare with the layout (Postscript. The wiring could not be shown because only 3 pho...
by PiyoTaro
Thu May 23, 2019 5:01 pm
Forum: ZX Spectrum (and Clones)
Topic: Design a small Sound card for Next
Replies: 12
Views: 1302

Re: Design a small Sound card for Next

Let's discuss "connectors and cases" first after my prototype works , and then investigate how many people want them as products. First of all my prototype is not working. It is necessary to verify why the decoder circuit was designed by "my misunderstanding" or whether the implementation of the ext...
by PiyoTaro
Thu May 23, 2019 1:30 pm
Forum: ZX Spectrum (and Clones)
Topic: Design a small Sound card for Next
Replies: 12
Views: 1302

Re: Design a small Sound card for Next

Have you seen https://www.tindie.com/products/TRC/zx-spectrum-edge-connector/ $2.25 when 10+ units ordered Back in the day companies were producing different expansion add ons. Some were plain through connectors either fixed or with a cable and I had one where was like a T junction so you had a ver...
by PiyoTaro
Wed May 22, 2019 11:02 am
Forum: ZX Spectrum Next
Topic: Help: Legacy peripherals do not work on my 2A board
Replies: 5
Views: 367

Legacy ROM mode help!/Re: Help: Legacy peripherals do not work on my 2A board

About the Legacy Machine mode. Please tell me how to make NMI/SD card drive work with Legacy 48K/128K ROM system. Does the current version of "TBBlue SD Distribution" not include software that supports "DivMMC"? The old "Startup Guide" describes how to deploy the esxdos site version of the software....
by PiyoTaro
Tue May 21, 2019 1:32 pm
Forum: ZX Spectrum (and Clones)
Topic: Design a small Sound card for Next
Replies: 12
Views: 1302

Re: Design a small Sound card for Next

Supplement. Information obtained from the connector's catalog. For the edge connector, "DIP SOLDER" type: One that plugs into the board and connects vertically with the motherboard. "CARD EXTENDER" type: Connect the board horizontally to the motherboard by pinching the board. I found a live video to...
by PiyoTaro
Sun May 19, 2019 9:12 am
Forum: Basic
Topic: Question: LoadSD at nextlib.bas / NextBuilder v5
Replies: 1
Views: 71

Question: LoadSD at nextlib.bas / NextBuilder v5

NextBuilder v5 Questions about the "nextlib.bas" library. Please answer my specific questions, as there is no such thing as a list of library functions. I want to create a program that reads a part of a large file in the SD card. The function "LoadSD (filename, address, size, offset)" is used in "Lo...
by PiyoTaro
Wed May 08, 2019 5:23 pm
Forum: ZX Spectrum Next
Topic: Help: Legacy peripherals do not work on my 2A board
Replies: 5
Views: 367

Re: Help: Legacy peripherals do not work on my 2A board

As I don't own a thermal printer ( zx , alphacom etc ) if you do a search on the forums you will see https://www.specnext.com/forum/viewtopic.php?f=6&t=634 and in the facebook group https://www.facebook.com/groups/specnext/permalink/619306438426680/ Thank you for your advice. In April 2018, I had p...
by PiyoTaro
Tue May 07, 2019 6:18 pm
Forum: ZX Spectrum Next
Topic: Help: Legacy peripherals do not work on my 2A board
Replies: 5
Views: 367

Help: Legacy peripherals do not work on my 2A board

When I connected my thermal printer "TIMEX Sinclair 2040" to the edge connector of "ZXSpectrumNext", it showed an unusual indication. As soon as the power of "ZXSpectrumNext" was turned on, the start menu was displayed and transitioned to the "Select Option" menu. When the printer is removed from th...
by PiyoTaro
Sun May 05, 2019 8:48 pm
Forum: ZX Spectrum Next
Topic: Musical potential of the NEXT.
Replies: 66
Views: 14472

Re: Musical potential of the NEXT.

FM pattents have expired... so no longer an issue And to optimize CPU, FM should be manipulated as logs and not in linear way (multiplications becoming simple additions)... (it's exactly what was done in the original FM hardwares...) 2 OPs FM (and probably 4 OPs) is really light for CPU... and is d...