Search found 665 matches

by Peter
Fri Sep 21, 2018 3:01 pm
Forum: Hardware
Topic: Issue 6 board updates
Replies: 16
Views: 807

Re: Issue 6 board updates

mk79 wrote:Well, serial on German PCs is standard DB9 and net connectors are basically standard 3,5mm jacks, just the power connector is really special.

PCs? I hope the many years of emulation did not make your subconsciousness exchange them with QLs :P

tetroid wrote:I made several Issue 6 PCB clones.

Amazing work!
by Peter
Wed Sep 19, 2018 3:36 pm
Forum: Hardware
Topic: Overview of QL SD / CF Solutions
Replies: 9
Views: 594

Re: Overview of QL SD / CF Solutions

Also, I seem to recall that QubIDE (QubATA) and original QL-SD formats were byte-reversed (so, not directly exchangeable without first converting) The formats are not byte-reversed! But the IDE bus must be read correctly, i.e. with big-endian 68K hardware QubIDE was designed for. As long as one use...
by Peter
Mon Aug 27, 2018 9:20 am
Forum: Hardware
Topic: 8302<>8049 communications...
Replies: 29
Views: 1948

Re: 8302<>8049 communications...

Games and the KEYROW and BEEP commands also call the IPC to directly scan a key row and to start and stop sound. To my surprise, during Q68 testing, no games were found which directly access the IPC for sound. Do you know any games that do? I was at first considering to implement the IPC inside the...
by Peter
Sat Aug 25, 2018 3:15 pm
Forum: Hardware
Topic: 8302<>8049 communications...
Replies: 29
Views: 1948

Re: 8302<>8049 communications...

While IPC comms on an original QL works based on pure polling, the Q68 PS/2 interface needs interrupts enabled for the emulation - KEYROW scans with disabled interrupts thus simply don't work on a Q68, so, games and other software that completely disable the OS won't work properly there. For clarif...
by Peter
Fri Aug 24, 2018 11:16 pm
Forum: Hardware
Topic: 8302<>8049 communications...
Replies: 29
Views: 1948

Re: 8302<>8049 communications...

My question here would be, what parts of the 8302 (and through it the IPC) are actually used on the application level. At first glance I'd say: Realtime clock, microdrive for copy protection, and (although it makes no sense) keyboard direct hardware access in very few games. The Q68 does not implem...
by Peter
Fri Aug 17, 2018 1:13 pm
Forum: General QL Chat
Topic: QL & PC Joysticks
Replies: 16
Views: 836

Re: QL & PC Joysticks

Sounds cool, any chance it will run on native hardware?
by Peter
Fri Aug 17, 2018 1:08 pm
Forum: The Welcome Area
Topic: Hello From Milan - Italy
Replies: 3
Views: 279

Re: Hello From Milan - Italy

Hi and welcome to the QL Forum! I hope you will receive your Q68 soon and have a lot of fun. :D
by Peter
Thu Aug 16, 2018 9:02 pm
Forum: Hardware
Topic: 8301
Replies: 66
Views: 2957

Re: 8301

Eh, yes - the thing is, we re limited to A16, A17 for decoding and that means 256k total which implies a cut-down version of SMSQ/E :( I didn't mean that SMSQ/E must fit into a 8301 replacement - it would require a RAM extension anyway and could be loaded from mass storage under QDOS/Minerva. But a...
by Peter
Thu Aug 16, 2018 9:16 am
Forum: Hardware
Topic: 8301
Replies: 66
Views: 2957

Re: 8301

A long time ago i read the reason for this is that /RAS cycling is used to drive an internal charge pump which generates a negative substrate voltage for the RAM chip, which is not visible on the outside. I have seen a maximum /RAS high time only for similar DRAM chips yet, not the 4164 in particul...
by Peter
Tue Aug 14, 2018 9:05 am
Forum: Hardware
Topic: Connecting a mouse to the QL
Replies: 8
Views: 544

Re: Connecting a mouse to the QL

RWAP wrote:A quick look on ebay shows some ps/2 mouse to serial port adaptors.

The adaptors I saw are passive and only work with obsolete combo mice which are also serial internally. No solution for recent PS/2 mice.

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