Search found 556 matches

by 1024MAK
Mon Apr 01, 2013 5:20 pm
Forum: Hardware
Topic: Fun things to do with an MC68EC020....
Replies: 153
Views: 33377

Re: Fun things to do with an MC68EC020....

Some great information in this thread. Thank you. Some other 68k CPU systems use a shadow (or part shadow) of the ROM at CPU address 0 and address 4. After reset, the CPU reads the ROM at address 0 and address 4, then the logic disables the shadow of the ROM at these addresses and maps RAM there ins...
by 1024MAK
Sun Feb 17, 2013 12:29 pm
Forum: Hardware
Topic: Ql video problem
Replies: 8
Views: 3005

Re: Ql video problem

Also test the supply voltage that feeds the MC1377P

Mark
by 1024MAK
Thu Feb 07, 2013 6:01 pm
Forum: Hardware
Topic: Micro peripherals Drive controler?
Replies: 39
Views: 10748

Re: Micro peripherals Drive controler?

What is the maximum number of drives that are supported?
If the answer is more than two then it must use a Shugart interface.

Mark
by 1024MAK
Mon Dec 24, 2012 4:08 pm
Forum: General QL Chat
Topic: Happy Christmas Everyone!
Replies: 1
Views: 1093

Re: Happy Christmas Everyone!

Oh go on then... Happy Christmas, and a Merry New Year to all QL users everywhere!

Mark
by 1024MAK
Mon Oct 01, 2012 10:49 pm
Forum: Hardware
Topic: ** SOLVED ** search for details on powerregulator upgrade
Replies: 3
Views: 1970

Re: search for details on powerregulator upgrade

Now, I've not yet tried any of these yet, but on some other machines (e.g. Spectrums and ZX81's) some people have fitted switch mode converters like Traco DC-DC Converters TSR-1 Series 1 A or RECOM R-78Bxx-1.0 DC/DC-Converters.

Mark
by 1024MAK
Sat Sep 29, 2012 10:02 am
Forum: Hardware
Topic: *** SOLVED *** 3.5 " floppy connection to qdisc interface
Replies: 34
Views: 12976

Re: SOLVED !! 3.5 " floppy connection to qdisc interface

The fault with the Speccy could be a internal power circuit fault. The circuitry in the Spectrum 16k and 48k versions need +5V, -5V and +12V supplies. A 7805 voltage regulator generates the +5V. A two transistor inverter circuit generates the -5V and the +12V supplies. The loss of the +12V supply is...
by 1024MAK
Sat Sep 22, 2012 10:42 am
Forum: Hardware
Topic: New Disk Drive Interfaces
Replies: 9
Views: 4119

Re: New Disk Drive Interfaces? No, we want a dual SD card IF

Rather than thinking about Z80 based devices, I think it would be better to see if an open source 68000 device could be adapted. Now, 68000 systems use a 16 bit data bus unlike a 68008 system like the QL. However, the 68008 can execute most 68000 code. Now the port on an Atari ST used for hard disk ...
by 1024MAK
Sat Sep 08, 2012 9:47 am
Forum: Software & Programming
Topic: Converting ESC/P2 output for modern printing
Replies: 58
Views: 14051

Re: Raspberry Pi - A commercial use?

I like this idea :D On the connection to retro machines, it would be most widely compatible if it had both a RS232 serial port and a Centronics ( IEEE1284 ) parallel port for input. As well as converting incoming data, it could act as a printer buffer as well. No more waiting for your retro machine ...
by 1024MAK
Sat Aug 25, 2012 11:26 am
Forum: Hardware
Topic: QL-SD card project
Replies: 43
Views: 14299

Re: QL-SD card project

An ideal use would be having a zip file full of QL tools and programs for new users which a pc can extract to the SD card already for use. :idea: This is an excellent idea :D When (or is it if?) QL-SD card systems become available, I would be very interested. I would buy at least one, likely two an...
by 1024MAK
Sat Aug 25, 2012 11:13 am
Forum: Hardware
Topic: Gold Card battery replacement BETA program - FULL
Replies: 10
Views: 5962

Re: Gold Card battery replacement BETA program - FULL

Keep the updates coming... :mrgreen:

As I'm after some of these... :D

Mark