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unused assembler commands?Z80 processor has commands like OUTI OUTD OTIR OTDR INI IND INIR INDR.They deal with sending /reading bolcks ofinformation to ports. The problem is, …
... OUTD OTIR OTDR INI IND INIR INDR.They deal with sending ... -
I/O contention model questionHi everyone, Sorry for my poor english. Together with a friend we are working on ZX Spectrum 48k implemented in FPGA. We have found bug in the Spect…
... IO machine cycle during INI/INIR/IND/INDR execution in ZX ... -
Ports AccelerationOn ZX48 or 128/+2(grey) is contended and uncontended ports. For example: if you will read 512 bytes sector from IDE device to ZX ram via INI or INIR,…
... ZX ram via INI or INIR, half of all ports will ...
LD B,0
INIR
New read sequence ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... than 256 bytes) since OTIR/INIR take the same number of ... -
iXpectum 1.2 HD (iPad enabled) is out!iXpectrum now supports iPad on jailbroken devices ;) Thanks to Ryosaebaa for his support... You can download by now at: [url]http://code.google.co…
... contention in IND,INDR,INI,INIR instructions.
- Fixed flags in ... -
IND/INDR/INI/INIR/OUTD/OTDR/OUTI/OTIRI'm looking for confirmation that the official Z80 User Guide from Zilog is wrong and that these composite instructions actually change the value of …
I'm looking for confirmation that the official Z80 User Guide from Zilog is wrong and that these composite instructions actually change the value of B first. You'd only notice this when reading or writing from a 16-bit I/O address using one of these ... -
New Z80 CPU emulation testerI have finally wrapped up the new [URL="http://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester package[/URL] I have previously announced in [URL…
... ://zxds.raxoft.cz/taps/misc/z80test-1.0.zip"]Z80 tester ... -
Zero 0.5 ReleasedAfter a bit of a hiatus, the next update of Zero is now available [URL="www.ramtop.wordpress.com"]here[/URL]. Feedback and bug-reports appreciated! …
... /> + Monitor can step over LDIR, INIR and other block commands (Obo ... -
Microdrive Serial ProtocolGentlemen, I've been dreaming for a long time to develop a Microdrive emulator, where an SD card loaded with .MDR cartridge images can be accessed t…
... is apparent that a single INIR/OTIR instruction handles the stream ... -
Tinkering with DMASo, some afternoon tinkering... [img]http://photo.alioth.net/tmp/dma_small.jpg[/img] The purpose of this all is to see what's possible using the Xi…
... have certain disadvantages of INI/INIR etc - the whole thing with ... -
EmuZWin supports 256 color gamesI am sorry starting new topic, but you see this info is important a bit: new version 2.4 of the EmuZWin is available to download, and it supports 25…
... (7-Apr-2004):
[-] Instructions INIR/OTIR fixed.
[+] Interface-I ... -
Spectrum IDE port addressesWith eight standard IDE ports to address and with the common access to information via the internet I would have thought that Spectrum IDE add-on har…
...not to mention that NOT using 8-bit ports you would disable INI/INIR and OTI/OTIR instructions - the fastest way of transferring data. -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... transfer speed, considering usage of INIR by IDE read.
My ... 't be true. You used INIR for read, and it takes ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... transfer speed, considering usage of INIR by IDE read.
My ... 't be true. You used INIR for read, and it takes ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... /sec is not possible with INIR instructions. Reason why I 'rebel ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... 't be true. You used INIR for read, and it takes ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... 't be true. You used INIR for read, and it takes ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... load is solved with 2x INIR.
Still, 218 KB/sec ... -
IDE harddisk emulation usageNot 'howto' question :) I'm curious about how many people tried it. It exists in Spin, Fuse & RealSpec - in last is most interface supported. 8-bit …
... same as OTIR-ing or INIR-ing them and I see ... -
unused assembler commands?Z80 processor has commands like OUTI OUTD OTIR OTDR INI IND INIR INDR.They deal with sending /reading bolcks ofinformation to ports. The problem is, …
... OUTD OTIR OTDR INI IND INIR INDR.They deal with sending ... -
unused assembler commands?Z80 processor has commands like OUTI OUTD OTIR OTDR INI IND INIR INDR.They deal with sending /reading bolcks ofinformation to ports. The problem is, …
... /> Many Spectrums have used the INIR command. :)
It is used ... -
unused assembler commands?Z80 processor has commands like OUTI OUTD OTIR OTDR INI IND INIR INDR.They deal with sending /reading bolcks ofinformation to ports. The problem is, …
... read data in with INI / INIR without worrying about how the ... -
GP2X handheld - ZX Spectrum emu goodnessIt's probably been covered here before, but I've spent the last week going crazy over the GP2X Linux-based, dual-core handheld that can emulate somet…
... (LDIR,LDDR,CPIR,CPDR,INDR,INIR,OTIR,OTDR) execute 8 t ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... and LDDR do, but OTIR, INIR, OTDR, CPIR and friends just ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
[QUOTE=Winston;210048]Not all the block instructions use BC. LDIR and LDDR do, but OTIR, INIR, OTDR, CPIR and friends just use B.[/QUOTE]
CPIR is like LDIR in that it uses the BC pair and not just the B register. -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... and LDDR do, but OTIR, INIR, OTDR, CPIR and friends just ... -
A few questions about machine codeOh no... another noob. I'm giving my first steps in assembler (finally, after 20 years stuck in BASIC). I read a SU article explaining that if I wan…
... ADDRESS in the OTIR and INIR instructions as opposed to the ... "repeat instructions" (LDIR, LDDIR, CPIR INIR, OUTR) all use the 16 ... of repeats).
The INIR AND OUTR instructions also use ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
... than 256 bytes) since OTIR/INIR take the same number of ... -
The direct bus or indirect one... that is the questionThe Ethernet project continues...and I'm in a quandry. So I've managed to implement enough socket library for the W5100 that socket, bind, listen, a…
...
ld b, length
inir
[/code]
And ... the inir instruction would just pull off ... more T-states than an INIR instruction!
(Yes, you can ...
