Search found 34 matches

by S_U_C
Sat Sep 28, 2019 2:15 pm
Forum: Other
Topic: MZ-80A / MZ-80K extra RAM
Replies: 22
Views: 10544

Re: MZ-80A / MZ-80K extra RAM

If you want faster video ram access you can always modify the hardware to use the HBL instead of the VBL you get 25 HBL / 1 VBL.
On the MZ80K this effected the keyboard input routine and you got about 20 characters per keyboard press not very helpful.
by S_U_C
Sun Sep 22, 2019 4:32 pm
Forum: Hardware
Topic: How can I convert PAL to NTSC on the MZ-700?
Replies: 8
Views: 4565

Re: How can I convert PAL to NTSC on the MZ-700?

Hi, as the MZ700 was a Japanese machine NTSC output but they also sold it with PAL output. If you look at the MZ700 service manual the PAL jumper goes to the LSI chip and it changes the video synch pulses from PAL to NTSC. On page 6 is the instructions use NTPL choose PAL OR NTSC. I found on the MB ...
by S_U_C
Tue Aug 20, 2019 1:05 pm
Forum: Other
Topic: Master-Boot (or similar) for the MZ-80A?
Replies: 4
Views: 3553

Re: Master-Boot (or similar) for the MZ-80A?

Hi,
the Sharp User Club has just produced a BOOTMASTER addon for their SuperCopy Plus disk coping /file transfer programs.
Why not join the Sharp User Club, their contact information is now John Duxbury sharp.users.club@btinternet.com
by S_U_C
Tue Aug 20, 2019 12:55 pm
Forum: Assembly
Topic: Sharp MZ80B BASIC as Assembker source available ?
Replies: 1
Views: 2566

Re: Sharp MZ80B BASIC as Assembker source available ?

Hi, have you thought about asking the Sharp Users Club if they can help, they still exist and looking for new members. They have quite a lot of information/programs for various Sharp machines. Why not join the Sharp User Club their contact information is now John Duxbury sharp.users.club@btinternet....
by S_U_C
Sun Jul 07, 2019 12:55 pm
Forum: Hardware
Topic: 80 columns on MZ700
Replies: 12
Views: 9017

Re: 80 columns on MZ700

I have look at my 80-column design and there are 2 options to cure the small dot problem caused by the faster modern chips. 1) increase the number of gates in the delay chain (the XOR gates have 2 times the delay as the invertors) we need 27nS so 3 spare XOR gates wired as buffers is 6 delays about ...
by S_U_C
Mon Mar 11, 2019 2:46 pm
Forum: Hardware
Topic: Reading MZ-80A/B discs on PC - Help please !
Replies: 3
Views: 3426

Re: Reading MZ-80A/B discs on PC - Help please !

Hi Here is the MZ80-B definition BEGIN SHA2 Sharp MZ-80B - 40 DSDD 48 tpi 5.25" DENSITY MFM ,LOW CYLINDERS 40 SIDES 2 SECTORS 10,512 SKEW 2 SIDE2 0 1,2,3,4,5,6,7,8,9,10 SIDE1 1 11,12,13,14,15,16,17,18,19,20 ORDER SIDES COMPLEMENT BSH 4 BLM 15 EXM 1 DSM 169 DRM 127 AL0 0C0H AL1 0 OFS 2 END Lets ...
by S_U_C
Mon Mar 11, 2019 12:37 pm
Forum: CP/M
Topic: CP/M on the MZ-80A
Replies: 18
Views: 11366

Re: CP/M on the MZ-80A

Hi , CP/M 2.2 or 2.3 for the MZ80-A is configured for a 40 column screen. If you have a MZ80-A fitted with the Kuma 80/40 column moderations there are 2 com files that switch the mode to the selected screen size allowing programs that require 80 column to run as intended. The Kuma 80/40 moderations ...
by S_U_C
Fri Mar 08, 2019 11:18 am
Forum: Hardware
Topic: Still faulty 80K
Replies: 27
Views: 10104

Re: Still faulty 80K

Hi
SG <enter> turns the sound on key press ON on the MZ80K
SS <enter> turns the sound on key press OFF on the MZ80K

use B <enter> on the MZ80A to toggle the Bell function to test sound is working.
by S_U_C
Tue Feb 26, 2019 5:28 pm
Forum: Other
Topic: Creating a sharp MZ80k Basic master disk (or any other disk)
Replies: 7
Views: 5280

Re: Creating a sharp MZ80k Basic master disk (or any other disk)

There was a series of programs in the Sharp User Club libraries called Super Copy Plus (S_Copy). It is a single/multi program copier from tape to disk, disk to tape, disk to disk using wild cards. It could also copy disks, single or 2 drives, and extra feature including backing up the disk to tape a...
by S_U_C
Tue Feb 26, 2019 3:41 pm
Forum: Hardware
Topic: 80 columns on MZ700
Replies: 12
Views: 9017

Re: 80 columns on MZ700

I design the SUC MZ700 80 column kit, and due to the interest shown on the forum I have look at it again, and found some possible solutions to the small dot problem caused by modern 74LS chips proagation delay is no longer 9nS. In fact the 700 did not require a frequence doubler as the CLOCK frequen...