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.
Search found 157 matches
- Wed May 01, 2024 7:24 pm
- Forum: Hardware
- Topic: CST Ram Plus eproms - CST QDisc v4 issue
- Replies: 20
- Views: 1390
- Mon Apr 29, 2024 6:56 pm
- Forum: Hardware
- Topic: S3 Reset Switch replacement
- Replies: 4
- Views: 566
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: 56
- Views: 6236
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: 56
- Views: 6236
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.
- Sat Apr 27, 2024 7:08 pm
- Forum: Hardware
- Topic: FPGA replacment for the ZX8301 ULA and more
- Replies: 270
- Views: 107569
Re: FPGA replacment for the ZX8301 ULA and more
Oh I hadn't noticed the 68HC001FN16, so in the 8 bit data bus mode it provides the all important A0 for the QL (IIRC Gold card ingot has to deal with that).
- Sat Apr 27, 2024 10:40 am
- Forum: Hardware
- Topic: FPGA replacment for the ZX8301 ULA and more
- Replies: 270
- Views: 107569
Re: FPGA replacment for the ZX8301 ULA and more
Brilliant work
- Sat Apr 27, 2024 10:37 am
- Forum: Hardware
- Topic: Announcing the new "Gold Card" - QIMSI Gold
- Replies: 56
- Views: 6236
Re: Announcing the new "Gold Card" - QIMSI Gold
Wow, that looks great. Like a QL compute module (conjures up a few ideas)
An simple internal DIN41612 to ROMport connector board might be useful
An simple internal DIN41612 to ROMport connector board might be useful
- Tue Apr 16, 2024 7:56 pm
- Forum: Hardware
- Topic: Gold Card Battery
- Replies: 3
- Views: 2288
Re: Gold Card Battery
Provides battery backed clock and a few unused bits in RTC chip hold settings for AUTO_TK2F1 (boot automatically as if you pressed F1 with TK2 extensions enabled, AUTO_TK2F2 for F2, AUTO_DIS cancels). Also SCR2EN/SCR2DIS for second screen and FLP_JIGGLE (fix for some drives). IIRC only 4 bits, but C...
- Sun Apr 14, 2024 3:59 pm
- Forum: Online Auctions
- Topic: QL Cartridges lot on Ebay
- Replies: 17
- Views: 2647
Re: QL Cartridges lot on Ebay
Subliminal? anagram of Quantum Leap
Re: Q40/Q60
Same item in UK
Edit: (to save another post in this thread). I find Amazon's search for products useless, too often I only find what I want when I do it in a roundabout way.
Edit: (to save another post in this thread). I find Amazon's search for products useless, too often I only find what I want when I do it in a roundabout way.