Search found 326 matches

by hlide
Wed Jan 29, 2020 12:05 pm
Forum: Assembly
Topic: Type of machine ?
Replies: 4
Views: 29

Re: Type of machine ?

One way to detect an MZ-80 K definitely is to check whether a byte write to $D000-$D3FF is mirrorred into $D400-$D3FF. One way to detect an MZ-80 A/MZ-1200 definitely is to check whether you can swap $C000-$CFFF into MONITOR ROM (that is, if you cannot modify a byte) One way to detect an MZ-700 or o...
by hlide
Wed Jan 29, 2020 9:32 am
Forum: Assembly
Topic: Type of machine ?
Replies: 4
Views: 29

Re: Type of machine ?

What are the machines you want to detect? the monitor name checking will be defeated with a custom rom.
by hlide
Wed Jan 29, 2020 9:31 am
Forum: Assembly
Topic: Type of machine ?
Replies: 4
Views: 29

Re: Type of machine ?

why $C800?
by hlide
Thu Jan 23, 2020 3:28 pm
Forum: Assembly
Topic: MZ-700 Graphics
Replies: 7
Views: 119

Re: MZ-700 Graphics

Details of differences between MZ-80A and MZ-1200: http://retropc.net/ohishi/museum/mz1200.htm.

In that article, you will find a lot of interesting detail about the hardware : a color screen was almost available for instance on MZ-80A.
by hlide
Thu Jan 23, 2020 3:24 pm
Forum: Assembly
Topic: MZ-700 Graphics
Replies: 7
Views: 119

Re: MZ-700 Graphics

Yes, probably the same way as between MZ-800 and MZ-1500 which the only common thing is the fact they are retro-compatible to MZ-700.
by hlide
Wed Jan 22, 2020 12:45 pm
Forum: Assembly
Topic: MZ-700 Graphics
Replies: 7
Views: 119

Re: MZ-700 Graphics

It looks as if MZ-80A is the low-cost version of MZ-80B (professional target). For instance, the video chips and the expansion bus would be more in common with the MZ-80B than the MZ-80K. I see no successor to MZ-80A which was only for oversea (MZ-1200 for Japanese market). I remember I read an Japa...
by hlide
Tue Jan 21, 2020 10:01 pm
Forum: Assembly
Topic: MZ-700 Graphics
Replies: 7
Views: 119

Re: MZ-700 Graphics

No, MZ-80 A is the only MZ to allow a double buffer because of the video chips it has. While MZ-700 has two pages, the second page cannot be displayed : you need to swap or copy bytes between them which is very slow because both pages can only be accessed during the horizontal blanking (signal /WAIT...
by hlide
Tue Dec 24, 2019 1:09 am
Forum: Other
Topic: [MZF] MZ7: MZF file compressor using ZX7 algorithms
Replies: 16
Views: 1556

Re: [MZF] MZ7: MZF file compressor using ZX7 algorithms

I have just updated the source under GitHub: https://github.com/SHARPENTIERS/mz7. By default, I copy the decompression code in the "keyboard buffer" to decompress and then launch the program from this area rather than from the cassette header of the file. The advantage is that if the program already...
by hlide
Fri Dec 20, 2019 10:08 pm
Forum: Other
Topic: SHARP MZ-2800/MZ-5500/MZ-6500 software
Replies: 12
Views: 490

Re: SHARP MZ-2800/MZ-5500/MZ-6500 software

Well for now, I have some other priorities like a flat moving and no clear ideas.
by hlide
Thu Dec 19, 2019 3:38 pm
Forum: Other
Topic: SHARP MZ-2800/MZ-5500/MZ-6500 software
Replies: 12
Views: 490

Re: SHARP MZ-2800/MZ-5500/MZ-6500 software

For now, I'm mostly interested in MZ-700, MZ-800, MZ-1500 and X68000 stuff.