Search found 143 matches
- Sat May 11, 2024 12:05 pm
- Forum: Hardware
- Topic: CST Ram Plus eproms - CST QDisc v4 issue
- Replies: 17
- Views: 868
Re: CST Ram Plus eproms - CST QDisc v4 issue
AFAIK the 68K/OS(32KB) file is a complete operating system replacement so I don't expect it to be recognised by QDOS/Minerva. Though it will be interesting to see if t0nyt's 68K/OS PCB can be realised as a schematic
- Sat May 11, 2024 11:49 am
- Forum: Hardware
- Topic: CST Ram Plus eproms - CST QDisc v4 issue
- Replies: 17
- Views: 868
Re: CST Ram Plus eproms - CST QDisc v4 issue
OK, the first thing to do would be to look at each of the files you wanted to add to EPROM in a hex editor. If they are true QL ROMable files then the format of the first few bytes is defined: $4A,$FB,$00,$01 unique identification word for ROM code $??,$?? offset to list of names of new SupreBASIC p...
- Sat May 11, 2024 10:45 am
- Forum: Hardware
- Topic: CST Ram Plus eproms - CST QDisc v4 issue
- Replies: 17
- Views: 868
Re: CST Ram Plus eproms - CST QDisc v4 issue
Do the files in EPROM have the required ROM header ident/banners at the 16K boundaries where needed? It would be easy enough to knock up simple SuperBasic script to PEEK at the appropriate places and show first few bytes (i.e. at each 16K boundary in top 256K of QL's 1Meg map).
- Tue May 07, 2024 10:02 am
- Forum: Software & Programming
- Topic: QSTAR 1
- Replies: 29
- Views: 1897
Re: QSTAR 1
But also
- Sun May 05, 2024 10:51 am
- Forum: Software & Programming
- Topic: 68K/OS "ROM" based disk attempt
- Replies: 28
- Views: 1220
Re: 68K/OS "ROM" based disk attempt
Would doing a cartridge dump using FORMAT RAM1_MDV1 be possible? (assumes at least map is same as normal QL mdv.)
- Sun May 05, 2024 10:42 am
- Forum: The Off-Topic Section
- Topic: Identity of PiHER 8C2K2 chip?
- Replies: 1
- Views: 313
Re: Identity of PiHER 8C2K2 chip?
Surely nothing more than DIP resistor packs (pull ups?).
(Looks like variation on https://www.jupiter-ace.co.uk/hardware_ ... oller.html)
(Looks like variation on https://www.jupiter-ace.co.uk/hardware_ ... oller.html)
- Wed May 01, 2024 7:24 pm
- Forum: Hardware
- Topic: CST Ram Plus eproms - CST QDisc v4 issue
- Replies: 17
- Views: 868
Re: CST Ram Plus eproms - CST QDisc v4 issue
I would at least try a logic probe on eprom select (pin 22 /OE) to see if after a reset it is at least polled to help start narrowing problem down.
Edit: removed text about jumbled roms; V4 is jumbled
Edit2: I use 'jumbled' (not scrambled) since that is what QEP III uses.
Edit: removed text about jumbled roms; V4 is jumbled
Edit2: I use 'jumbled' (not scrambled) since that is what QEP III uses.
- Mon Apr 29, 2024 6:56 pm
- Forum: Hardware
- Topic: S3 Reset Switch replacement
- Replies: 4
- Views: 365
Re: S3 Reset Switch replacement
We're gonna need a bit more info than that, it's a big sitePopopo wrote: ↑Mon Apr 29, 2024 4:02 pm it seems I have found the direct replacement on Aliexpress.
https://www.aliexpress.com/p/order/index.html
- Mon Apr 29, 2024 11:16 am
- Forum: Hardware
- Topic: Announcing the new "Gold Card" - QIMSI Gold
- Replies: 45
- Views: 3775
Re: Announcing the new "Gold Card" - QIMSI Gold
Surely only by having a job running on BBQL to periodically copy 32K screen dump through FIFOs to QIMSI Gold
- Sat Apr 27, 2024 7:12 pm
- Forum: Hardware
- Topic: Announcing the new "Gold Card" - QIMSI Gold
- Replies: 45
- Views: 3775
Re: Announcing the new "Gold Card" - QIMSI Gold
Gets even betterPeter wrote: ↑Sat Apr 27, 2024 1:11 pm You may have noticed 2 x 2 extra pins in addition to the QL ROM port (the smaller ones near to the edge).
One of them is leading QLNET and one is a "detection" pin.
The other two could be used with such a connector board. Possibly one as R/W and one as a chip select.