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Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
I've done a quick test with write-enabling the multisource ROM (effectively becoming RAM) and it still runs fine here. Course I left the Speccy ROM write-disabled to prevent self-corruption. -
Why?Why did [URL="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=150097013013&ssPageName=STRK:MEWA:IT&ih=005"]this[/URL] go for ?155?
@Jack_Leather: It was the 'Cookie' rom.
I still want to buy one of those 128K's, but not for that price. -
Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
You'll probably find the problem fairly quickly if you ... trace it from the RST 0 with a debugger ... my recently patched version of the Picturesque debugger. This should run ... 't use any routines in the Spectrum ROM, so it's ideal ... -
Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... have source code access to the actual Emulator?
... to get the emulator to do the hardware paging when the Program ... to patch both the BASIC ROM and the MicroSource ROM. I worry relocating ... to be, particularly for the MicroSource ROM which is a bit ... -
divIDE ProductionJust to let everyone know that we have made further progress with the updated divIDE. Board design has been completed and changes have been made to …
... !!
Anyways, the news on our website has ... pictures of the latest DivIDE Plus, incorporating the extra ROM and RAM ... br />
Apologies for the continued delays (long story), but ... with the new functionality, memory and ResiDOS ... -
toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... a ROM that takes over upon startup, and would have the ... of autobanking system so the whole DB ROM can be addressed at ... be able to checksum the Spectrum's ROM (this wouldn't work ... modded Spectrum ROMs, but the DB ROM might have several checksums available ... -
toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... of connecting the Spectrum via the edge connector to the PC. ... Then, running diag software on the PC, the ... ROM available that runs using no RAM. Basically, you just remove the ... original ROM, fit a socket and ... -
Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... routine BloodBaz used to snatch the uSource ROM was, in fact, ... line and disable the -ROMCS line so the BASIC ROM is not enabled ... . Once the address is ... its doings, in effect disabling the uSource ROM and reenabling BASIC.
Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... routine BloodBaz used to snatch the uSource ROM was, in fact, paging ... by loading BC with *the address* and ... ). This bugger puts the BC reg pair in the address bus and ... to implement that in the emulator. I knew the device responds to ...Currah MicroSource emulationIt appears to be impossible to emualte the MicroSource in software on the ZX Spectrum SE as hardware polling is required. The following patch is not …
... routine BloodBaz used to snatch the uSource ROM was, in fact, paging ... by loading BC with *the address* and ... This bugger puts the BC reg pair in the address bus and ... IN to identify the address that causes the paging in the first place ...toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... devices. It connects to the Z80 single board computer I ... PC, and write it to the flash ROM).
I ... just have LCDs on the mind at the moment!
the Z80 bus, and thus ... consists of only the connectors, PCB and a ...TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... bombs out at 32768. When the ROM does the initialisation, it writes a ... not fail with BASIC, but the ROM cannot initialize it properly, then ... maybe speed is the issue. ROM init loop ($11DA RAM ...What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]
... odious;177767]Ok, thanks. The ram is running quite ... PCF1306P...?[/QUOTE]
The PCF chip is basically a ... It's all the logic in the 48K Spectrum, shoved ... ROM, but for it to be a =2, you'll need the ... +2 ROM. The 128 ROM will work tho.< ...Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... misinterpreted the program.
However: If the fault is in the ... />
Then the values tested across the chips don't match ... to ignore the first few bytes where the code is ... /> How difficult to replace the Speccy Rom with an EPROM? There' ...What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]
... />
So, i fitted the 27c256 and it started running ... removed and replaced the eprom and resoldered the pcf, rom and z80 ... />
While the eprom is testing the banks, those patterns change ... , like in the picture below. I did swap ...What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]
I would expect the pattern to change as ... tested, so you're seeing the test actually taking place. ... Is there no documentation with the test ROM?
If ... you remove that test ROM and replace it, you get ... yes? Points to your ROM being duff if you ask ...What's the most probable......cause for this on a grey +2? (z80 is excluded) [url]http://img376.imageshack.us/img376/8087/plus2hk9.jpg[/url]
... /> Is there no documentation with the test ROM?
If you ... traces that appear on the first pic. The same thing happens ... it's something else. The test rom should appear in a perfectly ... wont even boot to the test rom. I repeated the test several times ...My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
... pass Phil's test IMO. The others aren't used too ... emulated ROM write-protected? tbh, I can't remember off the top ... of my head whether the Spectrum ROM destroys itself ...My emulator doesn't take "commands"Hi This is probably a question that is very hard to answer, but perhaps some of you have/had the same problem. In my own emulator (that I have built)…
... emulated ROM write-protected? tbh, I can't remember off the ... top of my head whether the Spectrum ROM destroys itself ... otherwise.[/QUOTE]
The ROM does attempt some writes to ... when destacking a value from the calculator stack.Reasons for buying a QL ?It seems, from what I have read, that the QL was a bit of a failure back in the days. But apart from being a collectible, is there any useful/intere…
... was one of the early ones, and the BASIC ROM was pretty buggy ... afford one - and the problems with the BASIC ROM meant I didn't ... on Shades though with all the players with 1200 or 2400 ...Reasons for buying a QL ?It seems, from what I have read, that the QL was a bit of a failure back in the days. But apart from being a collectible, is there any useful/intere…
...
I thought the design of the QL was terrible; probably ... work to. The CPU, the dongled ROM, the microdrives, the dodgy serial ... port and the Psion ... against it. Although the graphics capabilities were ...Amstrad +2 Diagnostic BoardCan anybody help I wish to buy the Diagnostic Board that connects to the I/O strip at the back of the Amstrad ZX Spectrum +2. Many thanks Martin
... (which is probably the majority of dead Spectrums ... or the ULA
* ability to program the flash ROM ... the flash ROM on power up/reset, or the Spectrum's ROM ... on power up/reset, in either case paging in the ... flash vs Spectrum ROM will be ...Anything good on the Sam Coupe?I've just tried a Sam Coupe and seen two of its headline games/conversions in action - Lemmings and Prince of Persia. Both are excellent. This comput…
... get quite a battering because the 'skeleton ROM' that was created from ... around 60% compatibility, as the proper Spectrum ROM couldn't be included ... in the emulators for copyright ... take very long for the real ROM to appear in PD ...Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... ]Then you really should download the later ROM and burn it to ... .[/QUOTE]
I got the rom image and I started searching ... for the instuctions, which eprom to use ... *broken* link to instructions about rom.
I tried to ...On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
... />
Tr3 as the one near the LM? Swapped that one ... work correctly), then the power supply circuit on the Spectrum itself ( ... mem and measured the voltages on the z80, rom and ula. Everything ... is ok.
Here's the ...divIDE problemsI have built one up and so far cannot load anything. The divIDE welcome screen comes up detects the drive.. 0 Seagate Technology 12 LBA 1 None 0 v…
Firmware is FATware 0.12.
I've tried a harddrive and a CF card formatted with XP as FAT.
I now think the Flash rom chip could be damaged.Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... am sure the plan was to replace them with proper ROM versions ... for repair so go by the ROM contents which can be saved ... /> I can't see how the ROM contents would affect compatibility with ... with the Plus 3 where Amstrad fixed the NMI routine in the main ROM.Will an interface 1 work with a +2?I don't want to break anything, can I bugger up the +2 by connecting an interface 1 and microdrive to it? Are they compatible? If they are, with no…
... you really should download the later ROM and burn it to ... 's enhanced 16K IF1 ROM and use that instead.[/ ... Collier's Interface 1 ROM uses the so called "unused" ... variable 23681 which holds the high byte of PR-CC ... so use of this ROM would render your computer ...Question about serial numbers, and issue marques.Hi, I don`t know if you can help me with this little question, but here goes. The spectrum computers have coloured serial numbers on the bottom of th…
... is the only person to ever discuss the 3rd ROM in ... detail. Gianluca Carri, who wrote the disassembly, mentioned the ... better networking routines written in the same space and a better ... . I quote the Interface serial number when ROM 2 started ( ...ResiDOS v2.00 releasedI've just posted a major new release of ResiDOS, at: [URL="http://www.worldofspectrum.org/residos/"]http://www.worldofspectrum.org/residos/[/URL] T…
... aowen;179889]Cool. What's the 'core' footprint now? Will ... need more?[/QUOTE]
The base system needs 2x16K RAM ... IDEDOS), plus 2x16K "ROM" banks (containing the Syntax ROM and the patched version of ... less than that now; the ResiDOS and IDEDOS banks are ...
