Search found 106 matches

by psmart
Thu Jun 24, 2021 2:49 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

arnuphis wrote: Thu Jun 17, 2021 7:28 pm Hopefully I get to post a video of it working in my 80b one day.

Sent a PM regarding the board.
Board as despatched, couldn't PM photos so adding them here.
INFO - 2.png
INFO - 1.png
by psmart
Thu Jun 24, 2021 8:38 am
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

(I already repaired a faulty FACIT 4070 paper tape puncher and .... punched some programs...maybe next project will be to load from paper tape...I am serious about it! hehe! -by the way ?I think that in a sharp model 'kernal' rom there is a paper tape loading code... 80K maybe?) :) - One of my firs...
by psmart
Tue Jun 22, 2021 12:43 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

Hi dat-alex, If i get to developing the 1773 before you will pass it on. Currently writing VHDL/C for an OSD on my emulator (similar to MiSTer but embedded), most of the emulator core is now functional on the Cyclone IV so once all this is done will turn to the much needed floppy controller. Please ...
by psmart
Wed Jun 16, 2021 10:50 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

A quick video showing the card being inserted, powered on and it booting Lemmings from the Lotharek HxC Emulator.

https://eaw.app/Downloads/SFD800.mov
by psmart
Wed Jun 16, 2021 10:40 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

All working, it wasn't the crystal per-se, slightly different crystal spec (it was bought from RS not Ebay!!!!) and needed the bias adjusting (R1/R2) and now ticks happily at 16MHz. I put together the BOM which can be found here: https://eaw.app/Downloads/SFD800.xlsx Total cost of parts is GBP26.98 ...
by psmart
Tue Jun 15, 2021 4:36 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 46
Views: 1892

Re: MZ-80b FI/O to HxC Cable

Just an update on the new board. PCB's received and first sample built (below). Powered up and it seeks the drive but always ends up with a loading error (screen below). I set about analysing the original board and the new board and found the XTAL circuit on the new board was outputting 8MHz when it...
by psmart
Wed Jun 09, 2021 10:39 pm
Forum: Hardware
Topic: MZ-700 Blank Key.
Replies: 18
Views: 294

Re: MZ-700 Blank Key.

Thanks, sadly the link returns PHP error, bad file/directory permissions or invalid site software configuration Just made some analysis on the original.sharpmz.org website. Seems there is an incorrect setup or transfer to a case sensitive filesystem. Most of the files are stored as lower case yet t...
by psmart
Wed Jun 09, 2021 9:37 pm
Forum: Hardware
Topic: MZ-700 Blank Key.
Replies: 18
Views: 294

Re: MZ-700 Blank Key.

Just rechecked the circuit and the attribute ram is driven by IC AD (74LS245) and the video by IC8D so this could be a potential candidate. Your screen output is white on blue so the attribute ram must be getting written to under software control.
by psmart
Wed Jun 09, 2021 9:31 pm
Forum: Hardware
Topic: MZ-700 Blank Key.
Replies: 18
Views: 294

Re: MZ-700 Blank Key.

Also the original.sharpmz.org website, all the file download links look broken, I wonder if it needs restarting or something has expired?
by psmart
Wed Jun 09, 2021 9:30 pm
Forum: Hardware
Topic: MZ-700 Blank Key.
Replies: 18
Views: 294

Re: MZ-700 Blank Key.

Re UV, it is the wavelength that is important, I have a 50W UV unit which I shone onto an eprom and it didnt erase it and when I checked the wavelength against a UV eraser spec it was different. Good idea though just need to source a UV led of the right wavelength.