Sharp MZ 800 Quick disk

[ales]

Hi,
Im sending the image you have sent last time formatted in Sharp MZ800. Before formatting it shows "unformatted error". During formatting it showed "filespace error". After fomat during reading it showed "OK!"

20260214DSKA0003FormattedInSharp.zip

(538 Bytes) Downloaded 121 times

A tried also "Roland FW" from standard package and result was the same no matter what image I have used.
Just one think, when reading Roland QD image from your package it showed some data on the disk. After formatting the behaviour is the same as all others images.
As I know based on internet information Roland and SHARP quick disk are slightly different. SHARP one is more dumb, it saves serial datastream directly to writing head (strange for me in this case is WD and RD blinking during formatting, which sohould not be possible in spiral physical disk format)?
Im quite optimistic after your finding something to be improved in the FW.
Thank you!

[Jeff]

Try to boot on the images from this post with the attached firmware :
viewtopic.php?p=26717#p26717
(MZQD.zip)

HxCUSBFE.UPD

(68 KiB) Downloaded 127 times

At least the gotek shouldn't crash anymore

[ales]

Hi,
I tried the sent FW and Gotek didn't halt during booting
But the behavior of first read, format and read after format is the same.

[Jeff]

Hi,
I tried the sent FW and Gotek didn't halt during booting
But the behavior of first read, format and read after format is the same.

yes the firmware mute the data line outside the "ready" area... i suspect that the MZ800 may don't like this.

Try this firmware instead :

HxCUSBFE.UPD

(67 KiB) Downloaded 132 times

again : Try to boot these images :
download/file.php?id=2392
Don't try to format / alter them yet.
Don't use the images already present on your usb stick - replace them with the ones present in the zip file.

[ales]

Hi,
thanks.
Booting and reading shows "Unformat Error". It reads about 5 seconds, which should be the right time. Booting shows "Unformat error" immediately.
Formatting shows "Filespace error" after 4 times RD-WR on display.
After formatting the reading shows "Ok!". That means file is altered somehow that Sharp recognize as blank QD.
Do you think there is a way how to solve?

[Jeff]

Same boot/read issue with this QD image ? (Mario)

DSKA0000.qd.zip

(21.24 KiB) Downloaded 128 times

[ales]

Hi,
with this image and last FW from this post it shows "Hard err". With reading and with booting.
During format "No filespace error", read after format "Ok!"

[Jeff]

Hi,
with this image and last FW from this post it shows "Hard err". With reading and with booting.
During format "No filespace error", read after format "Ok!"

And if you try so save a file on the formatted image ? (please share the hfe after the file write)

(I will work on the write issue this week end.)

[ales]

Hi,
I'm sending the files. The last FW from the forum, the last QD image from forum. 1. just read "Hard error", 2. just format - reading "Ok" 3. format and Flappy game written.

QDWrite.zip

(75.48 KiB) Downloaded 122 times

EDIT: Even after formatting and writing Flappy, reading shows just "Ok!" but, no files stored. Booting the same.

[ales]

Hi Jeff,
maybe you have found time to look on QD for Sharp MZ-800 issue?
THX

[ales]

Hi Jeff,
any chance to get the QD emulation work with Sharp MZ-800?
Are there "old" FW version confirmed to work?
Thank you.

BR,
Ales

[Jeff]

This is quite embarrassing : I definitively need to have access to one of these machines to work seriously on this issue.

This is shame that the currently available images doesn't seems to be readable on your machine for some reasons.
Do you know if an MZ 1500 images should be readable on a MZ 800 ?

[ales]

Hi,
I understand that without real HW is not possible to make big progress (at least without access to protocol definitions).
On MZ 1500 is inbuilt the same QD interface including the drive. The difference is that on MZ 1500 both sides of the QD media is used.
Data should be stored the same way as for MZ 700 or 800, so should be visible from monitor, readable, but only MZ 700 version of games will run (as MZ 1500 is backward compatible with MZ 700).