Viewing Issue Advanced Details Jump to Notes ] mz700.cpp
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06469 Documentation Feature Have not tried Jan 6, 2017, 19:09 Feb 13, 2017, 16:28
Tester demotester View Status Public Platform MESS (Official Binary)
Assigned To Resolution Open OS
Status [?] Acknowledged   Driver mz700.cpp
Version 0.181 Fixed in Version Build Normal
Summary MESS-specific 06469: mz700, mz800, mz1500: Difference between MZ-1500 and MZ-800 !
Description Ad 1)
A quote from youkan (Japan) about the misconception among MZ-1500 and MZ-800 system:

 "It is misunderstanding that MZ-800 and MZ-1500 are almost identical. MZ-1500 is not just a Japanese version of MZ-800. They are both based on MZ-700 architecture but differently extended. MZ-1500 does not have 640x200/320x200 bitmap screen but has 8-color PCG screen (1024 PCGs consist 320x200 screen). MZ-1500 has two SN76489 while MZ-800 has one. Etc. You would easily understand it if you look at the motherboard of them."

Ad 2)
Very detail description of difference between Jpn. MZ-1500 and MZ-800 versions: (pls. use translation from the site link)

Ad 3)
Scheme of MZ-1500 - IO_198409 on p.337 -
Scheme of MZ-1500(QD) - IO_198410 on p.345 -
Steps To Reproduce
Additional Information Currently the "mz800_cass" sw-list is attached to mz1500 driver instead of mz1500 sw-list, and according to above this is wrong !
Both MZ-1500 and MZ-800 are compatible with MZ-700 sw-list, but are not compatible between itself !
So, the "mz700_cass" list could be attached to both mz1500 and mz800 drivers as they are compatible with it !
Regression Version
Affected Sets / Systems mz700, mz800, mz1500
Attached Files

-  Notes
User avatar
Feb 13, 2017, 16:28
edited on: Feb 13, 2017, 16:40
Ad4) -- Overview: "The MZ-1500 is a successor that has enhanced functions such as graphics, sound, etc, following the basic design and specifications of the MZ-700. -- Overview: "As a successor to the MZ-700 in the European market, it is different from the successor MZ-1500 in the Japanese market which was strengthened focusing on hobby applications, in that it is strengthened to withstand practical use in business as well as hobby use."

So, the MZ-800 is not the European version of the MZ-1500 nor the MZ-1500 is the Jpn. version of the MZ-800 (as it is mention in the driver) !