Search found 816 matches

by Pr0f
Sat Mar 13, 2021 7:50 pm
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 450
Views: 61477

Re: Today I Received...

How compatible is the 68K core in these 68[S|V]Z328? - I know the coldfire project ran into some issues with instructons not behaving in the same way, which broke compatibility with QL software. A lesser issue occurs with 68020/68030 and using instructions that have become priveleged - these have to...
by Pr0f
Sat Mar 13, 2021 9:49 am
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 450
Views: 61477

Re: Today I Received...

Dave, Are these the 68030's with the MMU or the ones without it? Even without an MMU, they can offer considerable speed advantage in a well designed board by making use of burst memory reads, cache's for both data and instructions, and have the advantage of being the last 68K series with the dynamic...
by Pr0f
Thu Mar 11, 2021 3:09 pm
Forum: Hardware
Topic: Ethernet for the QL
Replies: 93
Views: 7832

Re: Ethernet for the QL

I was looking at this too - but the video chip - V9990 is rarer than rock horse poop. Still - it proves that an IP stack can fit in a reasonable footprint - let's face it I don't think anyone is expecting to be able to open a full colour browser with java, etc on a QL - I hope not. But smtp / ftp an...
by Pr0f
Thu Mar 11, 2021 11:44 am
Forum: Hardware
Topic: Ethernet for the QL
Replies: 93
Views: 7832

Re: Ethernet for the QL

Something like this might work on the QL : https://en.wikipedia.org/wiki/LwIP It was successfully ported to the Kiwi 68K project - which is also built around the 68008 (all be it the 4Mb addressing version in the 52 pin PLCC). The footprint is relatively small at around 40K and would use less memory...
by Pr0f
Wed Mar 10, 2021 12:06 pm
Forum: Hardware
Topic: Ethernet for the QL
Replies: 93
Views: 7832

Re: Ethernet for the QL

LS245 or F245 buffers with direction controlled by BG signal ? No other card will assert that apart from GC or SGC
by Pr0f
Wed Mar 10, 2021 10:24 am
Forum: Hardware
Topic: Sinclair QL Factory Test Jig
Replies: 40
Views: 3472

Re: Sinclair QL Factory Test Jig

It reminds me of the electric hair trimmers you get in the barber shop ;-)
by Pr0f
Mon Mar 08, 2021 9:00 am
Forum: The Off-Topic Section
Topic: Happy Birthday!
Replies: 328
Views: 102565

Re: Happy Birthday!

С днем ​​рождения (google translated)!
by Pr0f
Tue Mar 02, 2021 11:51 am
Forum: Hardware
Topic: Issue5 start problem
Replies: 7
Views: 1090

Re: Issue5 start problem

According to the datasheet - the -P1 is a 120ns part, so should be fine for a QL
by Pr0f
Fri Feb 26, 2021 1:49 pm
Forum: General QL Chat
Topic: Wafer but no ice cream
Replies: 5
Views: 704

Re: Wafer but no ice cream

There are hard disks that are basically fast RAM with a backing storage -flash / hard disk - and some kind of power safe write back cache. The idea being that all external I/O to the drive is seeing fast RAM to read and write from, but the disk manages copying out updates to the backing storage and ...
by Pr0f
Sun Feb 21, 2021 12:06 pm
Forum: The Off-Topic Section
Topic: Marmite
Replies: 12
Views: 1388

Re: Marmite

recycled beer brewing leftovers :-) Brilliant idea :-)

https://www.greatbritishlife.co.uk/thin ... on-6506740