Search found 138 matches

by psmart
Sun Aug 06, 2023 6:19 pm
Forum: Hardware
Topic: MZ-80a disk options
Replies: 5
Views: 1746

Re: MZ-80a disk options

Thank-you for this info, appreciated. It will help as I want to encapsulate Microtech CP/M in my ROM FS. I've designed a new version of the SFD700 with additional on-board FlashRom to make it more versatile. I discovered this issue with Microtech, I was using an AFI ROM from sharpmz.org and the seco...
by psmart
Mon Jul 24, 2023 9:30 am
Forum: Hardware
Topic: MZ-80a disk options
Replies: 5
Views: 1746

Re: MZ-80a disk options

Pictures of the SFD-700.

Some issues, I used a Russian 74LS04 as I couldnt get 74LS04 devices in quantity from Signetics/TI, big mistake, I fail to bias it reliably and so cannot get it to oscillate. The dev board, 3rd photo, I had to hard wire an SMD oscillator to further the project!!!
by psmart
Mon Jul 24, 2023 9:12 am
Forum: Hardware
Topic: MZ-80a disk options
Replies: 5
Views: 1746

Re: MZ-80a disk options

The SFD-700 card I am developing works in the MZ-80A https://eaw.app/sfd700/ and also the MZ-700 albeit I still have some quirks to resolve, for instance, the card boots BASIC SA-6510 and F-DOS 7010 no issues on an MZ-80A but the Microtech CP/M fails to boot, I need to disassemble the FDC code and w...
by psmart
Thu Jun 22, 2023 9:19 am
Forum: Hardware
Topic: Kuma MZ-80A 40/80 Column modification
Replies: 0
Views: 2943

Kuma MZ-80A 40/80 Column modification

I have just put up details of the Kuma 40/80 column modification on my website https://eaw.app/kuma80 if anyone is handy with a soldering iron and wants 80 column display. It only requires 3 components and some fine rewiring.
by psmart
Thu Jun 22, 2023 9:17 am
Forum: CP/M
Topic: MicroTech CP/M and Sharp F-DOS
Replies: 0
Views: 3642

MicroTech CP/M and Sharp F-DOS

Havent posted in a while, but seen a lot of posts wanting the same as myself, MicroTech CP/M for the Sharp MZ-80A. I eventually obtained it along with Sharp F-DOS and have posted the manuals and disks on my website, https://eaw.app/microtechCPM and https://eaw.app/fdos - F-DOS is a comprehensive dev...
by psmart
Fri Nov 19, 2021 12:47 am
Forum: Hardware
Topic: MZ700 video problem
Replies: 25
Views: 19652

Re: MZ700 video problem

Hi John, I keep seeing quite a few posts coming up about MZ-80K/MZ-700's not booting/video problems. Would it be an idea to post your binary in a sticky so that enthusiasts with a prom programmer can blow your test program? I (and no doubt others) could also offer an at cost (prom+postage) aid so at...
by psmart
Fri Nov 19, 2021 12:30 am
Forum: Hardware
Topic: MZ80A in need of repair - SE England
Replies: 4
Views: 2853

Re: MZ80A in need of repair - SE England

Hi Chris and welcome, Age has taken out the capacitors, the monitor section gets hot and the capacitor decay rate is that much greater than the rest of the machine. As a minimum the time base capacitor (C2007) for the vertical line driver IC UPC1031H goes u/s and as a consequence can take out the IC...
by psmart
Wed Sep 29, 2021 4:07 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 64
Views: 32797

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

Good news :) I splashed out on a Gotek for my MZ-2000 (having loads of issues with the HxC recently which randomly stops working for days on end!!!) and the Gotek works fine, very impressed. The config files I have are as follows: IMG.CFG [default] cyls = 40 heads = 2 secs = 16 bps = 256 id = 1 mode...
by psmart
Sun Sep 26, 2021 6:58 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 64
Views: 32797

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

Hi, the crystal impedance matching and capacitance is very important, i’ve come unstuck on my MZ80A video board with this issue, check the capacitors (on original one of them was removed as I guess the crystals specs of the manufacturing units were different to the design. On my first run of this bo...
by psmart
Sat Sep 25, 2021 5:47 pm
Forum: Hardware
Topic: MZ-80b FI/O to HxC Cable
Replies: 64
Views: 32797

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

Hi, If the card was working you should see the FD Loading error and a menu with C: CMT, F: Floppy Disk being presented. The screen you show seems to me to indicate only the CMT could be found. When you turn on the floppy disk should automatically activate and (on my HxC) stepping activity can be see...