Search found 62 matches

by psmart
Sun Nov 08, 2020 10:52 am
Forum: Hardware
Topic: MZ-700 Upgrade - tranZPUter SW-700
Replies: 0
Views: 619

MZ-700 Upgrade - tranZPUter SW-700

Just thought I would share my most recent board with the forum as I slowly piece together the documentation which can be found at https://eaw.app/sharpmz-700-upgrades-tranzputer-sw/ This is an amalgamation of my MZ-80A developments for the Sharp MZ-700 providing it with a much needed boost in terms ...
by psmart
Sat Oct 24, 2020 11:35 am
Forum: Hardware
Topic: Mz80-A no cursor
Replies: 8
Views: 1964

Re: Mz80-A no cursor

Found the reason today by accident, basically replace your 8253 Timer IC (IC 47). I was transferring developments from my MZ700 board to my MZ80A board and inadvertently blocked $E000 - $E7FF which manifested the same problem you have, ie. no cursor, just the monitor signon text. I then decided to n...
by psmart
Fri Oct 23, 2020 6:00 pm
Forum: Hardware
Topic: RGB to VGA for MZ-700
Replies: 10
Views: 4779

Re: RGB to VGA for MZ-700

Just had time to double check and I was wrong in terms of the cable wiring when I removed /HSYNC+/VSYNC+CSYNC and replaced it with just CSYNC working. It was my new board that works with just CSYNC but on the MZ700, even though it is not electrically sound, shorting /HSYNC + /VSYNC + CSYNC together ...
by psmart
Sat Oct 10, 2020 11:13 am
Forum: Hardware
Topic: RGB to VGA for MZ-700
Replies: 10
Views: 4779

Re: RGB to VGA for MZ-700

I need to double check what I said above as I cant remember whether I tested the modified cable on the original MZ700 hardware or my new board (which has selectable +CSYNC and /CSYNC). CSYNC on SCART should be positive whereas the MZ700 is negative. Although not electrically correct it may be workin...
by psmart
Fri Oct 09, 2020 11:29 pm
Forum: Hardware
Topic: RGB to VGA for MZ-700
Replies: 10
Views: 4779

Re: RGB to VGA for MZ-700

SCART uses pin 20 (Video In) as the CSYNC input when using RGB and pin 16 is tied high or pin 20 for the composite video when pin 16 is tied to ground. I looked at the document posted and this is how the cable I bought was wired but connecting an output which is high to an output which is low will y...
by psmart
Fri Oct 09, 2020 2:33 pm
Forum: Off-topic
Topic: Introduction
Replies: 56
Views: 22939

Re: Introduction

Forgot to add:- both devices are fully reprogrammable with the Altera Quartus II software, you need v13.0.1 for the CPLD and v13.1 for the Cyclone III - see my website https://eaw.app/sharpmz-upgrades-video/#quartus-prime-in-docker to use docker which is the easiest way to use Quartus. The CPLD is s...
by psmart
Fri Oct 09, 2020 2:19 pm
Forum: Off-topic
Topic: Introduction
Replies: 56
Views: 22939

Re: Introduction

Pictures below are for the MZ-80A which has the tranZPUter SW v2.2 board and the Video Module v2.0 board (equivalent to the above board but made as two separate boards) and the MZ-800 with a tranZPUter SW v2.2 board (no plans to add better graphics to the MZ-800 as it already has pixel graphics and ...
by psmart
Fri Oct 09, 2020 2:16 pm
Forum: Off-topic
Topic: Introduction
Replies: 56
Views: 22939

Re: Introduction

I'm not familiar with the Unicard, but the board runs at 20MHZ (either the original CPU Freq of 3.58MHZ or any frequency from 0Hz to 20MHz output by the MK64FX512 timer - the Z80 is the limit for the highest frequency). As the video/graphics are off the main board, they too run will run at the highe...
by psmart
Fri Oct 09, 2020 9:43 am
Forum: Hardware
Topic: RGB to VGA for MZ-700
Replies: 10
Views: 4779

Re: RGB to VGA for MZ-700

Depending on your TV/monitor, you dont need a special adapter. On the MZ-700/MZ-800 I have made up a standard cable, 8 pin DIN plug (RGB + VSYNC + HSYNC) to a 15pin VGA male plug and it drives a Samsung 40" TV, a MAXIT 11" monitor and an OSSC Scan Converter perfectly well. The frequency of...
by psmart
Thu Oct 08, 2020 7:53 pm
Forum: Hardware
Topic: Mz80-A no cursor
Replies: 8
Views: 1964

Re: Mz80-A no cursor

Just catching up, my hypothesis earlier seems more relevant if it is not the 556 timer, ie. it is believing there is a rom at $E800 or $F000 and making a jump to this location. If there is no ROM in the User ROM socket or an FDC card installed then without a scope it will be difficult to locate, it ...