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z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…
... , without calling the ROM?
Working with ROM routines is quite ... and you can actually beat Spectrum ROM easily in terms of speed ... -
Rom routine for pixel addressDear all, Having my bi-annual 'lets try machine code' project again and have come up with a problem with the pixel address rom routine at 8874. …
... on p116 of The Complete Spectrum ROM Disassembly for more info.
Recommend-me-do - memory card devicesSo, both myself (with a +3 that has a dodgy drive) and my friend (with a +2) are looking at the various options for loading from memory card. What…
... based on the standard Spectrum ROM tape routine. So a ... storage systems for the Spectrum offer various different features. ... Programmable-Sinclair-ZX-Spectrum-Interface-2-ROM-Cartridge-4245"]buy ... Computers/Sinclair/Sinclair+ZX+Spectrum/Hardware"]SellMyRetro[/url] ...Spectrom interface ?Hi all, I got 2 of this devices ... :) [img]http://forest.no-ip.org/wos/spectrom/20151006_151428.jpg[/img] [img]http://forest.no-ip.org/wos/sp…
... ?[/quote]
Normally, Spectrum ROM occupies the lowest 16 K ... to disable that ROM by pulling /ROMCS (ROM Chip Select) line ... can page it's own ROM in when needed. When this ... happens, the external ROM (or RAM) temporarily occupies the ...Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... is "-lmz" to use the spectrum rom's floating point implementation). There ...Full-screen 32 columns bicolor engine NIRVANA+I'm glad to announce the release of [b]NIRVANA+ ENGINE[/b], providing support for bicolor graphics (multicolor 8x2) in 32 columns for all standard Sp…
... is "-lmz" to use the spectrum rom's floating point implementation). There ...128K Toast Rack / +2 Grey Bug Fixed english ROM ?Just spotted this on ebay before ending: http://www.ebay.com/itm/1x-Sinclair-ZX-Spectrum-128K-Toast-Rack-2-Grey-Bug-Fixed-english-ROM-/26206065205…
... 48k machines, the most compatible "ROM" for a 128k machine will ... compared to the original ZX Spectrum ROM (as Balford described above).
Can a "ROM" for a 128k toastrack or ... PCB, both sockets should have ROM chips in.
[ ...128K Toast Rack / +2 Grey Bug Fixed english ROM ?Just spotted this on ebay before ending: http://www.ebay.com/itm/1x-Sinclair-ZX-Spectrum-128K-Toast-Rack-2-Grey-Bug-Fixed-english-ROM-/26206065205…
... 48k machines, the most compatible "ROM" for a 128k machine will ... compared to the original ZX Spectrum ROM (as Balford described above).
ROM 0 or ROM 1 in order increase ...Interface 1 - RS232 question.I am thinking about doing some Spectrum stuff based around the RS232 port used on the Interface 1. Has anyone had any joy doing this with an emulator…
... at the point the ROM routine is called to ... whole byte, then forcing the ROM routine to complete - much ... routine being called in the ROM, inject one block from ... the same speed as the Spectrum ROM routine can manage, but ... you're calling the ROM routine to do it.< ...Interface 1 - RS232 question.I am thinking about doing some Spectrum stuff based around the RS232 port used on the Interface 1. Has anyone had any joy doing this with an emulator…
... at the point the ROM routine is called to ... whole byte, then forcing the ROM routine to complete - much ... routine being called in the ROM, inject one block from ... the same speed as the Spectrum ROM routine can manage, but ... you're calling the ROM routine to do it. ...Fixed point math lib?Is there a liberally licensed fixed point math lib for z80 somewhere? When searching, I expected to find a bunch of GPL'd ones and perhaps one or two…
... code done in registers. The spectrum rom actually contains such a multiply ... similar is done with the spectrum rom code.
But ...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... Timex was expanding the 48k spectrum rom but they released before they ... />
The rom difference caused a lot of spectrum programs to be ... call directly into the rom to do something. Spectrum emulator cartridges are ...NTSC Compatibility?Correct me if I'm wrong, but wasn't the Timex 2068 the only NTSC clone built of the ZX Spectrum? And I use clone lightly... From what I underst…
... cart is basically a ZX spectrum rom on a board, when it ... board rom of the TS2068 turning it into a ZX spectrum (kind ... twister board WITH the zx spectrum emulator rom built in..and for ... -TS2068-New-Version-with-ZX-Spectrum-Emulator-on-Board-/121794234115?hash ...DVD title sequenceHello I'm not sure if this is the best place for this - but let's see how we go. I run a little DVD making company here in Cardiff, and we are …
... @MykeP I think the standard Spectrum Rom characters would be exactly what ...Spectrum Screen RAM layoutHi there The spectrum screen layout is rather odd. It seems to be arranged into 3 256 byte groups. If I have an x (horizontal) coordinate (from…
... />
Also there is the ROM routine PIXADD at $22AA
Spectrum ROM Disassembly[/url]
by Dr ...Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…
From the symptoms, I think it's highly likely the CPU is faulty, though I couldn't rule out a RAM (upper or lower) fault. It's very rare for the ZX Spectrum ROM to fail. While you're at it, also check the -5 and 12 V power supply rails at the lower RAM.Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …
... experimental compressor that uses the spectrum ROM as an additional lookup - it ... file:
2286 - rbc (rom based compression)
3685 - ucl ...Compression comparisonsI did some comparisons of different compression methods. To make this relevant to zx spectrum, I first gathered a corpus of relevant data: 6660 .TAP …
[quote="Sol_HSA;845237"]I made an experimental compressor that uses the spectrum ROM as an additional lookup[/quote]
There are different ROMs on different machines, so this idea is a dead end.Sinclair's Cancelled ProjectsDoes anybody have anymore info on any of these projects or are there any old Sinclair engineers on the Spectrum scene that could shed a little more l…
... did.
The ZX Spectrum was a response to the ... not go to plan, the Spectrum ROM is actually unfinished (hence a ... even more so, the 48k Spectrum were much more successful than ...Simple bit of machine code not working [SOLVED]ishHi all. It's late and I'm tired and I have no idea why the following piece of code wont display a little smiley face [code]ld hl,udg ld (236…
... " (Orange Book), and "The Complete Spectrum ROM Disassembly" (book or PDF) for ...what is this ?Hi all, I miss on ebay last days two of this strange things (different versions)? what is this and who made them .. ? google is not my friend in th…
... , possibly including a patched ZX Spectrum ROM. And a small (8 pin ...Russian-speaking topic - Multiface 3Hi friends! The Administration will not mind if I create a topic in which you can communicate in Russian? No politics. No racism. Speccy only! :-) …
... collect Multiface3 (M3), the ROM which is the best? ... the M3 assembly. Is ROM, laid out there a ... versions of the Multiface 3 ROM.
The only ... Can I somehow change the ROM multifeysa that he established ... of the Spectrum ROM.
To page the ROM back in, ...are there any assembly games listings with mnemonics?hi, i would like to get hold of some assembly games listings (that i dont have to type in (copy/paste,etc)) with mnemonics (i think thats what u cal…
... be the Logan/O'Hara "Spectrum ROM Disassembly" book.Any noob friendly speccy dev tutorials?I mean, for a person who never used ANY kind of assembly, let alone Z80 one. Would be good if focused on making a game. Additionally, I want your …
... Machine Code on your ZX Spectrum by Toni Baker
The Complete Spectrum ROM Disassembly by Dr. Ian Logan ...Any noob friendly speccy dev tutorials?I mean, for a person who never used ANY kind of assembly, let alone Z80 one. Would be good if focused on making a game. Additionally, I want your …
... against reading the The Complete Spectrum ROM Disassembly book. Although the book ... itself is excellent, studying the ROM is a terrible way to ...Modifying Commodore datacorder's for Speccy use. Is it possible?Just wondering if it's possible to modify a Commodore datacorder for use with the Speccy, or if anyone has. My assumption is the output and input on …
... the interface doesnt work with Spectrum ROM, manufactured by NEC.
With ... other ROM versions, seems to work without ...ZX Spectrum CartridgesI have been thinking of "cloning" ZX Cartridges for a while (case, board and silicon skirt), to be able to make new releases or replace damaged cartr…
... /> Examples:
- Replace you Spectrum ROM, so that you can use ... another implementation or fixed ROM, (gosh wonderful, for example), but ... ...
- Re-issue previous ROM formats, like the 10 Sinclair ...
