Search found 126 matches

by Whopper
Tue Jul 02, 2019 6:03 pm
Forum: Software & Programming
Topic: Address register usage
Replies: 2
Views: 399

Address register usage

Hi All, It's stupid question time, again! I'm doing some assembler programming and wonder what the 'normal' usage of address registers A4, A5 & A6 are. Can I use these with impunity? Will the civilisation as we know it collapse? OK, maybe not quite that bad but are there problems or effects that...
by Whopper
Mon Jun 10, 2019 7:01 pm
Forum: Compatibles Corner
Topic: Q68 I2C addresses.
Replies: 16
Views: 2185

Re: Q68 I2C addresses.

The Q68 manual is correct regarding i2C addresses. Note that the clock register is output only, nothing you can read there. Peter, Thank you for this. Now I need to check the actual pins and their levels, but I would have needed to do that anyway. If the CLK ($1C1C0) is un readable, how do you chec...
by Whopper
Sun Jun 09, 2019 5:28 pm
Forum: Compatibles Corner
Topic: Q68 I2C addresses.
Replies: 16
Views: 2185

Re: Q68 I2C addresses.

Derek, Currently I am using SuperBasic PEEK & POKE to control the IO ports. I intend to bitbilt the ports to drive the Q68s I2C pins directly. The pins themselves will drive a level changer to the desired voltage for the external device. The coding is being done in assembler and C. There are no ...
by Whopper
Sat Jun 08, 2019 7:07 pm
Forum: Compatibles Corner
Topic: Q68 I2C addresses.
Replies: 16
Views: 2185

Re: Q68 I2C addresses.

Derek, Thanks for the reply. I have also examined the Q68 manual and that section. However While I can control $1C1C4, i.e. set it to 1 and read back a 1, then set it to 0 and read back a 0, I cannot set / reset $1C1C0. It remains a 0 no mater what I do. So I was wondering if the manual was in error...
by Whopper
Sat Jun 08, 2019 4:52 pm
Forum: Compatibles Corner
Topic: Q68 I2C addresses.
Replies: 16
Views: 2185

Q68 I2C addresses.

Hi All,

Please could someone confirm for me the memory addresses for the I2C clock and I2C data lines.

I seem to be able to control $1C1C4 & $1C1C6 but not $1C1C0.

Thanks,

Whopper
by Whopper
Fri May 24, 2019 8:58 pm
Forum: For Sale
Topic: Mirical Systems Gold card for sale
Replies: 9
Views: 1629

Re: Mirical Systems Gold card for sale

Doesn't look like this seller is having much luck. :D

Edited - for spelin
by Whopper
Thu May 23, 2019 10:09 pm
Forum: For Sale
Topic: Mirical Systems Gold card for sale
Replies: 9
Views: 1629

Re: Mirical Systems Gold card for sale

It's for sale for more than 3 months and it's been relisted 4 times. It is "untested" . If I remember correctly it started at 200 and previously the seller also sold a QL so he could have tested it, if the QL was in working order. Andrew, Perhaps a low offer might be made. I already have ...
by Whopper
Thu May 23, 2019 5:43 pm
Forum: For Sale
Topic: Mirical Systems Gold card for sale
Replies: 9
Views: 1629

Mirical Systems Gold card for sale

Hi All,

I just noticed a Mirical Systems Gold card for sale on eBay. https://www.ebay.co.uk/itm/Miracle-Systems-Gold-Card-disc-interface-for-Sinclair-QL-computer-/264326681793?_trksid=p2385738.m4383.l4275.c10

Whopper


Edit - And there aren't any bids yet. !!!!!
by Whopper
Thu May 23, 2019 5:15 pm
Forum: General QL Chat
Topic: The Sinclair QL Series
Replies: 11
Views: 1834

Re: The Sinclair QL Series

Hi All,

Thank you for your help. I now have the complete series of books. :D


Whopper
by Whopper
Thu May 09, 2019 11:13 pm
Forum: General QL Chat
Topic: The Sinclair QL Series
Replies: 11
Views: 1834

Re: The Sinclair QL Series

Norman, Thank you for your links. I found two books that I don't have 'Profiting from the Sinclair QL' & 'Introduction to Superbasic on the Sinclair QL' I was able to order both. One seller was offering the Intro to Superbasic for £113.16 (plus P&P) a bit steep for me. Sometimes I wish I'd d...