Recent content by N. Brown

Ya, there are a flew 100A that always seam's to come up for resale/reuse. So an memory expansion card that doesn't need some wire jumper leads is still a good ideal.

Right On - With my current work load who knows how long it would of taken to get a similar device done.

With the Sinclair QL we use to use Custom Bus adapters with some custom logic so we could use surplus peripherals from other 68000 based micros on it. Like Sun Microsystems compatible old Floating Point Processor Cards and other industrial interface units.

Basic details can be found in there manuals that are available on line for the AURORA card, but I have attached a basic outline of it. The Bugs with ARS ROM Paging has the AURORA cards ROM Paging register Address and Its Contents as well as other design issues related to it (, if you are using...

I am a little short of time to day, so I will try to answer this question quickly. I have quickly attached some photos of the 16-bit ISA Bus Adapter for the system 36, that is what you should look for in the system in question. .. More pictures of system 36 bards/logic boards for the system 36...

As far as communication standard the System 36 supports that is listed in its manuals. The system supports : Async Formats formats, Sync Communication Formats in either ASCII or EBCDIC formats through its existing serial communication ports. To support others like AES Data format, Sinclair QL...

In your System/36 model 5363 message, it doesn't state much about the system configuration. So any forum reader, should take it that the system is configured in its default state. AKA, as in a IBM AD for that model. Your message doesn't state a II, III version so we should interpret this as a I...

I wasn't going to reply to this entry but I decided may I should as others haven't. .. You should also look at the ROM memory paging system that the AURORA card used. The old SUN 1 and 2 workstation logic designs is worth looking at if you can find a extended memory board schematic for one...

Ha if you have an external Quest made QL Firefly Hard drive and or a Quest made OScard then please message me directly. .. I had a Sinclair QL computer for years now and once used it lots, but it has been pack away for several years now. Mostly do the cost of upgrading the unit and finding the...

YA, to use a Super I/O chip from an Intel based PC clone would be the ideal way to go. Easy to interface to other microprocessors and should still be easy to get a hold of (in small quantiles). .. As far as an expansion bus standard for a updated QL clone, there is some decisions to be made...

The standard IBM PC and PCXT use the following addresses for the NPU addressing (in Hex format) 0F0 Clears Math Coprocessor Busy Signal 0F1 Resets Math Coprocessor --------------------------------------- 0F2 reserved 0F3 reserved 0F4 reserved 0F5 reserved 0F6 reserved 0F7 reserved * 0F8 to 0FF...

The Modify Int.. Vector is not the same one that used to modify the 100A to a 100B Level. For this revision I can longer find the modified BIOS ROM of the Darkweb for it.

The Memory Adapter with the optional 8087 Option pictures I originally uploaded, could be different then the ones that BIGFIX provided in there uploaded documentation. Some boards have a 541634-X-X-cX number. .. For those forum users that are following this set of messages just so you know that...