Forum Announcement
22/04/2018 - The Online Chat isn't working via the normal link.
You can connect via IRC, or using another web client - https://kiwiirc.com/client/chat.qlforum.co.uk/#qlforum

Search found 1342 matches

by tofro
Thu Apr 26, 2018 3:46 pm
Forum: Hardware
Topic: 68060 based QL system?
Replies: 99
Views: 3364

Re: 68060 based QL system?

Is there any hope for Q40 owners to benefit from this?

Thanks,
Tobias
by tofro
Thu Apr 26, 2018 10:58 am
Forum: Software & Programming
Topic: System Variables - what are the rules...
Replies: 7
Views: 193

Re: System Variables - what are the rules...

Because the system designers owned the System variables. So they could, and they did. You don't ;) Some of the blank spots in QDOS SV definitions have already been filled with SMSQ/E extensions, so in order to stay compatible, you should at least look into these. And in the last 35 years, quite a nu...
by tofro
Thu Apr 26, 2018 7:30 am
Forum: Software & Programming
Topic: System Variables - what are the rules...
Replies: 7
Views: 193

Re: System Variables - what are the rules...

Any memory you anchor in the system variables is not going to be maintained by the system - A pure serial driver should easily be able to put any pointers into PDB and DDB, where the memory is to a large part maintained (allocated and freed) by the system. Leave dynamic memory in the places the syst...
by tofro
Fri Apr 20, 2018 8:44 pm
Forum: Software & Programming
Topic: SMSQ/E Manual v1.05
Replies: 1
Views: 107

Re: SMSQ/E Manual v1.05

Some recent experience that might be worth adding to the troubleshooting guide:

When booting SMSQ/E for the Gold or Super Gold Card and you end up with a non-working keyboard:

Reconfigure SMSQ/E for "ABC keyboard: none"

Tobias
by tofro
Fri Apr 20, 2018 1:49 pm
Forum: Hardware
Topic: 68060 based QL system?
Replies: 99
Views: 3364

Re: 68060 based QL system?

I am specifically talking about devices that share the processor bus and are addressed in CPU space, and use the A line and F line instructions. So you meant the peripheral chips that used the official coprocessor interface of th m68k. Indeed , these were only the MMUs and the arithmetical co-proce...
by tofro
Fri Apr 20, 2018 11:33 am
Forum: Hardware
Topic: 68060 based QL system?
Replies: 99
Views: 3364

Re: 68060 based QL system?

Pr0f wrote:The original coprocessor architecture of the 68K was supposed to be extensible, but I only recollect FPU and MMU being made availabe, were there any others??


There were at least the 68440/450 DMA controllers, 68681 DUART, 68901 MPU and 68230 PIT

Tobias
by tofro
Wed Apr 18, 2018 6:33 am
Forum: Hardware
Topic: 68060 based QL system?
Replies: 99
Views: 3364

Re: 68060 based QL system?

MacOS is written in a high-level language, most probably C. Porting it from PPC to x86 involved "only" recompiling it on the new platform and "fixing a few quirks". Still, it took a company like Apple about a year. SMSQ/E is written in 68k assembly completely. Porting to a new pl...
by tofro
Sat Apr 14, 2018 10:20 pm
Forum: The Off-Topic Section
Topic: Hardware values...
Replies: 2
Views: 165

Re: Hardware values...

Dave, retro computing stuff is worth what people are willing to pay and price depends a bit on how urgently people want stuff - An SGC is one of the most urgently wanted pieces of QL Hardware and is thus worth nearly the price when it was new to some people. Last few eBay auctions I have seen were b...
by tofro
Sat Apr 14, 2018 9:38 am
Forum: Hardware
Topic: Problem at boot time
Replies: 12
Views: 387

Re: Problem at boot time

For me this looks like a bad contact somewhere (memory ?). I had a similar problem, it went away when I moved the SGC DRAM chips a little inside their sockets. Same here. The RAM chips on the SGC seem to suffer from oxidation of the pins in the sockets over time. Wiggling them very carefully helps ...
by tofro
Sat Apr 14, 2018 7:12 am
Forum: Software & Programming
Topic: Mawdraw problem (easyptr4)
Replies: 12
Views: 463

Re: Mawdraw problem (easyptr4)

Giorgio,

the simplest way to achieve that is to create a bitmap of that two lines of text and put the bitmap in the menu.

There are probably better ways to do that, though.

Tobias

Go to advanced search