<P><HR><HR><P> <A NAME="TOC"> <B>Table-of-Contents</B> <UL> <LI><A HREF="#GENERAL">General Information about Z80-Family</A> <LI><A HREF="#BASICS">Basic Information</A> <UL> <LI><A HREF="#BASICS_ARCH">Architecture</A> <LI><A HREF="#BASICS_DATA">Data Sheets</A> <LI><A HREF="#BASICS_INST">Instruction Set</A> <LI><A HREF="#BASICS_HARD">Hardware</A> <UL> <LI><A HREF="#BASICS_HARD_PIN">Chip Pinouts</A> <UL> <LI><A HREF="#BASICS_HARD_PIN_Z80">Z80 Series</A> <LI><A HREF="#BASICS_HARD_PIN_Z85XX">Z85xx Series</A> <LI><A HREF="#BASICS_HARD_PIN_Z80_ASSP">Z80 ASSP Series</A> <LI><A HREF="#BASICS_HARD_PIN_Z180">Z180 Series</A> <LI><A HREF="#BASICS_HARD_PIN_Z280">Z280 Series</A> <LI><A HREF="#BASICS_HARD_PIN_Z380">Z380 Series</A> <LI><A HREF="#BASICS_HARD_PIN_CUSTOM">Customized Z80 Series</A> <LI><A HREF="#BASICS_HARD_PIN_NSC800">NSC-800 Series</A> <LI><A HREF="#BASICS_HARD_PIN_MCS80">MCS-80 Series</A> <LI><A HREF="#BASICS_HARD_PIN_MCS85">MCS-85 Series</A> <LI><A HREF="#BASICS_HARD_PIN_MISC">Miscellaneous Series</A> </UL> <LI><A HREF="#BASICS_HARD_SCHEMA">Circuit Schematics</A> </UL> <LI><A HREF="#BASICS_SOFT_TUTOR_ASM">Software Tutorials</A> </UL> <LI><A HREF="#SPECIAL">Special Items</A> <UL> <LI><A HREF="#SPECIAL_Z80">Special Items (Z80)</A>  <LI><A HREF="#SPECIAL_UPUC">Special Items (uP/uC in general)</A> </UL> <LI><A HREF="z80os.htm">Operating Systems for Z80 Family</A> <LI><A HREF="z80bus.htm">System Busses for Z80 Family</A> <LI>Products based on Z80 Family <UL> <LI><A HREF="z80bms.htm">Boards, Modules and Sub-Systems</A> <LI><A HREF="z80cs.htm">Computer Systems</A> <LI><A HREF="z80gm.htm">Game Machines</A> <LI><A HREF="z80vdt.htm">Video Display Terminals</A> </UL> <LI><A HREF="#SRC_OFFER">Source Offers</A> <LI><A HREF="#SRC_REQUEST">Source Requests</A> <LI><blink><A HREF="z80r4d.htm">Requests for Documents</A></blink> <LI><A HREF="#PROJECT">Projects</A> <LI><A HREF="z80sdt.htm">Software Development Tools</A> <UL> <LI><A HREF="z80sdt.htm#SDT_ASM">Assemblers</A> <LI><A HREF="z80sdt.htm#SDT_DISASM">Dis-Assemblers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_BAS">Basic Compilers</A> <LI><A HREF="z80sdt.htm#SDT_INTERPRETER_BAS">Basic Interpreters</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_C">C Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_FORTH_CPM">Forth Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_FORTRAN_CPM">Fortran Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_MODULA2_CPM">Modula2 Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_PAS">Pascal Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_PLM">PL/M Compilers</A> <LI><A HREF="z80sdt.htm#SDT_COMPILER_PRO">Prolog System</A> <LI><A HREF="z80sdt.htm#SDT_DBG">Debuggers</A> <LI><A HREF="z80sdt.htm#SDT_SIM">Simulators</A> <LI><A HREF="../uepte.htm">Programmer's Text Editors</A> <LI><A HREF="z80sdt.htm#SDT_IDE">Integrated Development Environments</A> <LI><A HREF="z80sdt.htm#SDT_UTIL">Miscellaneous Utilities</A> </UL> <LI><A HREF="z80emu.htm">Emulators and I.C.E.</A> <LI><A HREF="#HDT">Hardware Development Tools</A> <LI><A HREF="#DISTRIBUTOR">Chip Distributors</A> <LI><A HREF="../uemsc.htm">Miscellaneous and more general Stuff</A> <LI><A HREF="z80ohp.htm">Other's Home Pages with Z80 Stuff</A> <LI><A HREF="z80m_l.htm">(Z80) Mailing Lists you may subscribe to</A> <LI><A HREF="z80nws.htm">Usenet Newsgroups (somewhat) related to Z80</A> <LI><A HREF="z80mag.htm">Magazines for Z80 Users</A> <LI><A HREF="z80books.htm">Literature about Z80 (in Table Form)</A> <LI><A HREF="z80lit.htm">Literature about Z80 (in List Form)</A> <LI><A HREF="../uehmr.htm">Humour</A> </UL> <P><HR><HR><P> <A NAME="GENERAL"> <H3><B>General Information about Z80-Family</B></H3> <UL> <li><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80cpus.htm"> Z80 CPU Pictures ( HTML ) </a> See what we are talking about. <LI><A HREF="http://www.infonia.ne.jp/~itous/cpu/cpu-e.html"> Zilog inside! ( HTML ) </A> An even closer view (for VERY curious folks :-) <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80lives.htm"> Z80 Lives! ( HTML ) </A> <BR>by <A HREF="mailto:info@ganssle.com"> Jack G. Ganssle</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80brief.htm"> Brief Description and Introduction ( HTML ) </A> <BR>Be warned: This is NOT one of the most up-to-date documents available! <BR>But some of its contents is still valid. <LI><A HREF="http://www.zilog.com"> Zilog, Inc.</A> Thanks to Zilog, they made it (the chip)    <LI><A HREF="http://www.hitachi.com/semiconductor"> Hitachi</A> <blink> What happened to HD64180 series? </blink> <LI><A HREF="http://www.toshiba.com/taec/nonflash/indexproducts.html"> Toshiba ( HTML ) </A> <blink> What happened to Z80 ASSP series? </blink>   <LI><A HREF="http://www.nec.com"> NEC</A> also offered Z80s once (uPD 70008) ... <LI> Sharp also did <LI><A HREF="http://www.zilog.com/frames/fz80_z180.html"> Z80 Family Members ( HTML ) </A> <B><blink>check URL</blink></B> <LI><A HREF="http://www.zilog.com/frames/z80/z80.html"> Z80 Family Members (PDF)</A> DMA, IPC, EIPC, KIO <LI><A HREF="http://www.eg3.com/gatoxzil.htm"> Zilog Internet Resources ( HTML )</A> <LI><A HREF="http://www.mitronet.com/chipdir/faq/z80.htm"> Zilog Z80 8-Bit Microprocessor ( HTML )</A> Don't believe EVERY number mentioned ... <LI><A HREF="http://stekt.oulu.fi/~jopi/cbm/z80_faq.html"> Z80 FAQ ( HTML ) </A> <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/z180s180.pdf"> Z180 CPU product specification (PDF)</A> (*) <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80382bd.htm"> Zilog Z30382 8-Bit Microprocessor ( HTML ) </A> <BR>Brief Description, Block Diagram and Pinout  <BR>Get the new Z382 from Zilog. 100% binary compatible but no MMU, however, nice 32 bit extentions to the registers give you 32 bit linear address space even with the old 8 bit code! </UL> <P><HR><P> <A NAME="BASICS"> <A NAME="BASICS_ARCH"> <H3><B>Basic Information (Architecture)</B></H3> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80block.gif"> Z80 CPU Block Diagram</A> See all the internal stuff in the CPU  <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <li><a HREF="<li><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80arki.htm"> Z80 CPU Architecture Block Diagram ( HTML ) </a> with info about the registers <UL> <LI><A HREF="http://www.cs.umu.se/~di95gpt/dark/"> same, Z80 Processorarkitektur (Swedish)</A> </UL> <LI><A HREF="http://193.23.168.87/TI-Mikroproz/23-Architektur_Z80.html"> Z80 CPU Architecture Block Diagram ( German HTML ) </a> <BR>by <A HREF="mailto:axel.schnell@fh-duesseldorf.de"> Axel Schnell</A> <LI><A HREF="http://193.23.168.87/BilderVorlesung%20%B5PT/Z84C015.GIF"> Z80C015 CPU Architecture Block Diagram ( German HTML ) </a> </UL> <P><HR><P> <A NAME="BASICS_DATA"> <H3><B>Basic Information (Data Sheets)</B></H3> <UL>   <LI><A HREF="http://www.zilog.com/develope/z80.html"> Zilog Z80 CPU (PDF)</A> <B><blink> check URL </blink></B> <LI><A HREF="http://www.zilog.com/pdfs/z80/z8400.pdf"> Zilog Z80 CPU (PDF)</A> <LI><A HREF="http://www.zilog.com/develope/z180.html"> Zilog Z180 CPU (PDF)</A> <LI><A HREF="ftp://ftp.geophysik.tu-freiberg.de/pub/docs/misc_pdf/Z80S180.pdf"> Zilog Z80S180</A> <LI><A HREF="http://www.zilog.com/ez80"> eZ80 CPU</A> <LI><A HREF="http://www.rabbitsemiconductor.com"> RabbitSemiconductor</A> has come out with a Z80 like part that over comes some of those shortcomings. <BR> Rabbit took the good features, the few that there where, of the Z80, added some real IO, RTC, four serial ports, cold booting from serial port and such. Wrote it all up in Verilog for a gate array and is now selling the results. <LI><A HREF="http://klsigw.klsi.com/products/standard.html#Microprocessors"> The KL5C8400</A> offers an internal 16-bit RISC-like architecture that is compatible at the binary level with the popular Z80 microcontroller <LI><A HREF="http://www.zilog.com/develope/z380.html"> Zilog Z380 CPU (PDF)</A> <LI><A HREF="http://www.farnell.com/datasheets/450001.pdf"> Z80 CPU (PDF)</A> This file is BIG, it contains the whole Z80 Family! <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/z84c90.pdf"> Z84C90 KIO (PDF)</A> <LI><A HREF="http://www.toshiba.com/taec/nonflash/indexproducts.html"> Toshiba TLCS-90 Series ( HTML ) </A> Architecture of CPU core is similar to Z80, but <blink><B> OpCodes are different! </B></blink> <BR>Select "MICROCONTROLLERS", then "8-Bit Microcontrollers -- TLCS-90 Series" <LI> NEC uCOM-87 Series <blink><B> URL missing </B></blink> <BR>Architecture of CPU core is similar to Z80, but <blink><B> OpCodes are different! </B></blink>  <LI>Hitachi 647180 <LI><A HREF="http://www.ab-semicon.com/"> AB180</A> <UL> <LI><A HREF="http://www.ab-semicon.com/products/ab180-20.pdf"> AB180-20 (PDF)</A> <BR>Observe differences to REAL Z80 Family members! <LI><A HREF="http://www.ab-semicon.com/products/ab1lib.olb"> Orcad Library</A> <LI><A HREF="http://www.ab-semicon.com/products/maclib.olb"> Orcad Library</A> </UL> <LI>There are also useful ICs outside Z80 Family: <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/82c55.zip"> Intel's 82C55 PPI ( ZIP'ed PDF file)</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/16550.zip"> 16C550 UART ( ZIP'ed PDF file)</A> <LI><A HREF="http://www.tu-chemnitz.de/~fachat/8bit/hardware/chips/6845/index.html"> MC6845 Video Controller ( HTML )</A> <BR>by <A HREF="mailto:fachat@physik.tu-chemnitz.de"> Andre Fachat</A> <LI><A HREF="http://www.tu-chemnitz.de/~fachat/8bit/hardware/chips/ls610/index.html"> SN74LS610 .. SN74LS612 Memory Mapper ( HTML ) </A> <BR>by <A HREF="mailto:fachat@physik.tu-chemnitz.de"> Andre Fachat</A> <LI><A HREF="http://www.msxnet.org/tech/VDP1.html"> TMS 9918A</A> Video Display Processor</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> <LI><A HREF="http://www.tu-chemnitz.de/~fachat/8bit/hardware/chips/wd1770/index.html"> WD1770 .. 1772 Floppy Disk Controller ( HTML ) </A> <BR>by Andre Fachat</A> </UL> </UL> <P><HR><P> <A NAME="BASICS_INST"> <H3><B>Basic Information (Instruction Set)</B></H3> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/3938/z80code.htm"> Introduction into Z80 Instruction Set ( HTML ) </A> <BR>by James Moxham <BR>Be aware of the fact that style how statements are arranged in examples reflects non-standard features offered by ZINT <A HREF="z80sdt.htm#SDT_SIM_PCDOS_ZINT"> Z80-Interpreter ( HTML ) </A>  <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80syntx.htm"> Z80 Assembler Syntax ( HTML ) </A> with detailed information about instructions <BR>still under construction! <LI>Z80 Instruction Set, sorted in various ways and combinations: <UL> <LI><A HREF="http://www.doitnow.com/~cdoty/z80inst.zip"> Alphabeticaly sorted ( ZIP)</A> with brief explanation of instructions <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80inst.txt"> Alphabeticaly sorted</A> showing # of T-states and brief explanation of instructions <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80href.txt"> Alphabeticaly sorted</A> showing flags affected and brief explanation of instructions <BR>by <A HREF="mailto:mha@ticalc.org"> Magnus Hagander</A> <LI><A HREF="http://www.msxnet.org/tech/Z80/flags.html"> Alphabeticaly sorted</A> explaining Flag Affection</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80time.txt"> Alphabeticaly sorted</A> showing # of T-states and size of instructions <BR>by <A HREF="offler@skip.adb.gu.se"> Oscar Lindberg</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80flag.htm"> Alphabeticaly sorted ( HTML ) </A> showing # of T-states and telling which flags are affected <UL> <LI><A HREF="http://www.void.demon.nl/Z80instructions.html"> same, different URL (NL HTML )</A> </UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80ins.txt"> Z80 instruction breakdown by machine code</A> See what's goes on in each machine cycle. Thanks to Alvin and Vaggelis. <LI><A HREF="http://www.nonowt.demon.co.uk/magfold/mcodefol/mcodei.htm"> ???</A> <LI><A HREF="http://www.wwwdotorg.org/z80/"> ???</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80sean.zip"> Z80SEAN.ZIP</A> </UL> <LI>Use one of these lists to disassemble "by hand": <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/disz80.txt"> Z80 Instruction Set, OpCode # sorted (Hex)</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/opcodes.txt"> Z80 Instruction Set, OpCode # sorted (Hex)</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80inst2.txt"> Z80 Instruction Set, OpCode # sorted (Hex and Decimal)</A> <BR>by <A HREF="mailto:S.N.Owen@newcastle.ac.uk"> Simon Owen</A> <LI><A HREF="http://www.msxnet.org/tech/Z80/Z80.txt"> Complete Opcode List (including undocumented ones)</A> showing # of T-states, M-Cycles, M1-Cycles <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> <LI><A HREF="http://www.msxnet.org/tech/Z80/z80.zip"> A Word95 document with all the instruction tables</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> </UL> <LI><A HREF="http://arachnid.cs.cf.ac.uk/User/K.E.W.Thacker/Amstrad/CPC_Guide/Hardware_Programming/Chips/z80/flags_info.html"> Flags-Info ( HTML ) </A> <blink> URL not yet OK </blink> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80-op.txt"> Z80 Instruction Set Summary</A> with brief explanations <LI><A HREF="ftp://ftp.comlab.ox.ac.uk/pub/Cards/Z80"> Z80 CPU Instruction Set (& CPU Pinout FTP HTML)</A> <BR>by Jonathan Bowen <UL> <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/Z80"> same, different URL (DE)</A> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/Z80.crd"> same, different URL (USA FTP HTML)</A> </UL> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80opcod.xpl"> Z80 OpCode Formation Rules ( FTP HTML )</A> rudimentary  <LI><A HREF="http://www.geocities.com/ResearchTriangle/Thinktank/2478/comput"> Z380 instruction set (HTML)</A> <BR>by <A HREF="mailto:beattidp@whidbey.net"> Douglas Beattie Jr.</A> </UL> <P><HR><P> <A NAME="BASICS_HARD"> <A NAME="BASICS_HARD_PIN"> <H3><B>Basic Information (Chips' Pinouts)</B></H3> <UL> <A NAME="BASICS_HARD_PIN_Z80"> <LI><A HREF="http://gulch.unica.it/~agemo/agemo/a_z80gif.html"> Z80 Family Pinouts (Italian HTML )</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/zinout.htm#Z80CPU"> Z8400 CPU ( HTML ) </A> <blink> Ignore Z8 pinouts </blink> <LI><A HREF="ftp://ftp.comlab.ox.ac.uk/pub/Cards/Z80"> Z8400 CPU (& Instruction Set FTP HTML )</A> <BR>by Jonathan Bowen <LI> Z8401 CPU with CGC <LI> Z8450 CPU with RAM <LI><A HREF="http://www.spies.com/arcade/schematics/"> Z8410 DMA</A> <LI><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80pio.htm"> Z8420 PIO ( HTML ) </A> (Parallel Input/Output controller) <LI><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80ctc.htm"> Z8430 CTC ( HTML ) </A> (Counter/Timer Controller) <LI><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80sio.htm"> Z8440 SIO ( HTML ) </A> (Serial Input/Output controller) <LI><a HREF="z80dart.htm"> Z8470 DART ( HTML ) </a> (Dual Asynchronous Receiver/Transmitter)  <LI> Z80 GLU (aka Z84C80 General Logic Unit) <BR> contained (according to the 1989 databook) an oscillator, DRAM interface, memory and I/O chip selects, reset circuit, watchdog timer, Z8500 interface, and wait state generators in a 68-pin PLCC package. <BR>Remembered by <A HREF="mailto:sw@cellware.de"> Stefan Wimmer</A> <LI> Z8490 KIO <LI> MK 3801 STI <A NAME="BASICS_HARD_PIN_Z80_ASSP"> <LI> TMPZ 84011 MPU <LI> TMPZ 84013 IPC <LI> TMPZ 84015 EIPC <LI> TMPZ 84112 ISDN <LI> TMPZ 84810 <A NAME="BASICS_HARD_PIN_Z85XX"> <LI> Z8530 SCC <LI> Z8531 ASCC <LI> Z8536 CIO <LI> Z8580 SCSI <LI> Z8581 CGC <LI> Z85230 ESCC <LI> LH8571 SPCC <LI> LH8572 SPCC <LI> LH8573 GPIB <LI> LH8575 MTSP <LI> LH8590 UPC <A NAME="BASICS_HARD_PIN_Z180"> <LI> Z80180 MPU <LI> Z80181 MPU <LI> Z80183 MPU Kerry Berland <A href="mailto:kerry@siliconengines-ltd.com"> Kerry Berland</A> reported: <BR> FINALLY Zilog has an interesting new part-- it has 8 channels of 10-bit ADC on board, a DAC, 2K of RAM, an interesting cell (PIOS) for generating complex waveforms, a boot loader for downloading external flash, and runs at 33 MHz. Lots of port pins. Looks as though somebody at Zilog actually looked at the 68HC11 and similar chips when planning the architecture. Would not be too surprised to see this part supplant the 68HC11 in many general-purpose 8-bit computing applications. We're designing it in right now to one of them..... <LI> Z80182 MPU <LI> Z80185 MPU <LI> Z80189 MPU  <LI> 647180 MPU <A NAME="BASICS_HARD_PIN_Z280"> <LI> Z80280 MPU <A NAME="BASICS_HARD_PIN_Z380"> <LI> Z80380 MPU <LI> Z80382 MPU <A NAME="BASICS_HARD_PIN_COSTUM">  <LI><A HREF="z80gboy.txt"> GameBoy "lean" Z80 <LI><A HREF="http://www.komkon.org/fms/GameBoy/Tech/"> Details about special "Z80" for GameBoy</A> <LI> Kawasaki KC80 <B><blink> Who can tell details?</blink></B> <LI> R800 made by Ascii Japan, used for MSX Turbo R (made by Panasonic) <B><blink> Who can tell details?</blink></B>  <LI><A HREF="http://www.ab-semicon.com/products/index.html#Processors"> AB180-20</A> <BR> A low-power, high-speed, Z180-clone by AB Semicon. 5 times the speed at 20MHz. One instruction per clock. 3.3V operation. <A NAME="BASICS_HARD_PIN_NSC800"> <LI> NSC 800 CPU is a Z80/8085 Hybrid, suitable for a quick start ... <LI> NSC 810 RAM-I/O-Timer <LI> NSC 830 ROM-I/O <LI> NSC 858 UART <A NAME="BASICS_HARD_PIN_MCS80"> <LI> Intel 8080 CPU <BR>Direct ancestor of Z80 <LI> 8250 UART <LI> 8251 PCI <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/zinout.htm#8255"> 8255 PPI ( HTML ) </A> <A NAME="BASICS_HARD_PIN_MCS85"> <LI> Intel 8085 CPU is "Stepbrother" of Z80: RISZ80, but suitable for a quick start ... <LI> Intel 8155 RAM-I/O-Timer <LI> Intel 8156 RAM-I/O-Timer <LI> Intel 8755 EPROM-I/O <A NAME="BASICS_HARD_PIN_MISC"> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/zinout.htm#16C550"> 16C550 Serial UART Pinout + info ( HTML ) </A> <LI> Z765 FDC <LI> WD1771 FDC <LI> WD1793 FDC <LI> WD2793 FDC <LI> Am9511 Arithmetic Processor <LI> Am9512 Arithmetic Processor </UL> <P><HR><P> <A NAME="BASICS_HARD_SCHEMA"> <H3><B>Basic Information (Circuit Schematics)</B></H3> <UL>  <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/x-osc.htm"> Crystal Oscillator Circuit ( HTML ) </A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80test0.htm"> Simple CPU tester</A> <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80test.gif"> Z80 Small System Schematic ( HTML ) </A> <BR>This is a system example with PARALLEL, SERIAL, RAM and ROM <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80-2.zip"> Z80 Schematic ( Protel)</A> <BR>The schematic above in the original Protel format </UL> <LI><A HREF="z80core3.htm"> 3 GIFs with Z80 Circuits ( HTML ) </A> <BR>Z80 CPU and Memory, CTC, SIO, and drivers for RS-232 interface <UL> <LI><A HREF="http://margo.student.utwente.nl/el/micros/xx80/z80_circ.zip"> probably same as above </A> <LI><A HREF="http://margo.student.utwente.nl/el/micros/xx80/z80_core.zip"> probably same as above </A> </UL> <LI><A HREF="z80core4.htm"> Z80 mini system ( HTML ) </A> <BR>Z80 CPU with EPROM, RAM and PIO, by M.Kimura <UL> <LI><A HREF="http://www.cocktail.cas.uec.ac.jp/~mkimura/hobbyele/z80mini.html"> same as above (Japanese HTML )</A> </UL> <LI><A HREF="ftp://ftp.psyber.com/dibs/CIRCATS/"> Look for "z80cor*.*" ( FTP ) </A> <BR>by <A HREF="mailto:dibs@psyber.com"> Dave Baldwin</A> </UL> <P><HR><P> <A NAME="BASICS_SOFT_TUTOR_ASM"> <IMG ALIGN="RIGHT" SRC="http://www.uni-karlsruhe.de/Icons/Logos/VVZmedium.gif" ALT="Student"> <H3><B>Software Tutorials</B></H3> <UL> <li><a HREF="http://www.calpoly.edu/~tllilleh/a86/a86.html"> Z80 ASM Lessons ( HTML ) </a> Don't get confused by term "ASM86" <LI><A HREF="http://home.att.net/~ahmedre/ti8x.htm"> ticalc ( HTML ) </A> (*) <LI>The TI-86 Assembly Guide: <UL> <LI><A HREF="http://www.ticalc.org/articles/ti86asm/lesson1.html"> Lesson 1 ( HTML ) </A> <LI><A HREF="http://www.ticalc.org/articles/ti86asm/lesson2.html"> Lesson 2 ( HTML ) </A> </UL> <LI><A HREF="http://www.dogtech.com/cybop/ti86/"> 86 CENTRAL - Optic2000's TI-86 Assembly Page</A> (*) <LI><A HREF="http://www.dogtech.com/cybop/ti86/asm_tut.htm"> Optic2000's TI-86 Page - Assembly Tutorials, Text Files, and FAQ's ( HTML ) </A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80code.htm"> Introduction into Z80 Instruction Set ( HTML ) </A> based on ZINT <BR>by James Moxham <LI><A HREF="http://www.geocities.com/SiliconValley/Heights/8504/"> Z80 Assembler Course</A> <B><blink> seems to be at a VERY early state </blink></B> <BR>by Shining Light </UL> <P><HR><P> <A NAME="SPECIAL"> <IMG ALIGN="RIGHT" SRC="http://www.uni-karlsruhe.de/Icons/Wizard.gif" ALT="Wizard"> <A NAME="SPECIAL_Z80"> <H3><B>Special Items (Z80)</B></H3> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80_faq.htm"> Z80 FAQ, Frequently Asked Questions ( HTML ) </A> <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80info.htm"> Z80 Information ( HTML ) </A> Read about the R register + more <A HREF="http://www.acorn.co.uk/~mrison/en/cpc/tech/z80flags.txt"> Z80 Flags( FTP HTML )</A> (*) <BR>by <A HREF="mailto:mrison@acorn.co.uk"> Mark G. Rison</A> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80mem.zip"> Z80 & Memory ( FTP ) </A> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80mem.doc"> Z80 & Memory ( FTP HTML )</A> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80reset.tim"> Z80 & Reset ( FTP HTML )</A> <LI><A HREF="http://margo.student.utwente.nl/el/micros/xx80/z80_rfrs.zip"> Z80 DRAM Refresh </A>  <LI><A HREF="http://www.softaid.net/emulate/hints/apbank.html"> Memory Banking Z80 Systems ( HTML ) </A> <BR>by <A HREF="mailto:info@softaid.net"> Softaid</A> <LI><A HREF="http://www.siliconengines-ltd.com/AN101.pdf"> MMU for Z80, solution based on LS273</A> <BR>by<A HREF="mailto:kerry@siliconengines-ltd.com"> Kerry Berland</A> <LI><A HREF="http://ocuhep.hep.osaka-cu.ac.jp/heplab/students/okumura/essay/sint.html"> Byte saving, conditional RST7 on Z80 ( HTML ) </A> <BR>by OKUMURA N. Shin-ya <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80-M1.whn"> Z80 & M1 ( FTP HTML )</A> <LI>Bugs and Errors in Offical Z80 Documentation: <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80bugs.htm"> Known BUGS ( HTML ) </A> <LI><A HREF="http://www.msxnet.org/tech/Z80/errors.html"> Errors in the Official Z80 Documentation</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> </UL> <LI>Undocumented Z80 Opcodes: <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80undoc.htm"> Z80 Undocumented Instructions ( HTML ) </A> <BR>by Jacco J.T. Bot <LI><A HREF="http://www.cis.ohio-state.edu/~eble/ti86/z80undoc.html"> Undocumented Z80 Opcodes ( HTML ) </A> <BR>by Dan <LI><A HREF="http://www.acorn.co.uk/~mrison/en/cpc/tech/z80undoc.txt"> Z80 Undocumented Instructions ( FTP HTML )</A> effects on flags (*) <BR>by <A HREF="mailto:mrison@acorn.co.uk"> Mark G. Rison</A> <UL> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80undoc.txt"> same, different URL (USA)</A> </UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80uibs.htm"> Z80 Undocumented Instructions ( HTML ) </A> <BR>by Bill Smythe <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/z80undoc.asm"> Z80 Undocumented Instructions ( FTP HTML )</A> some postings <LI><A HREF="http://www.msxnet.org/tech/Z80/opcodes.html"> Undocumented Opcodes</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> </UL> <LI><A HREF="http://arachnid.cs.cf.ac.uk/User/K.E.W.Thacker/Amstrad/CPC_Guide/Hardware_Programming/Chips/z80/dd_prefix.html"> DD Prefix ( HTML ) </A> URL not yet OK <LI><A HREF="http://margo.student.utwente.nl/el/micros/xx80/z80_pio.zip"> Z8420 PIO Programming ( ) </A> Don't expect what you might expect! <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z255pro.htm"> 8255 PPI Programming Info ( HTML ) </A> <LI><A HREF="http://www.hep.phy.cam.ac.uk:8080/rison/cpc/tech.html"> Z80-inside ( HTML ) </A> <BR>by Mark Rison <LI><A HREF="http://www.labyrinth.net.au/~donmck/z80.html"> Z80 ( HTML ) </A> <BR>by <A HREF="mailto:don@dontronics.com"> Don McKenzie</A> <LI><A HREF="http://www.ganssle.com"> Articles</A> <BR>by <A HREF="mailto:info@ganssle.com"> Jack G. Ganssle</A> <BR>Search and you will find Z80 stuff <UL> <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/ammu.shtml"> Z180 MMU revealed ( HTML ) </A> <LI>  Huge Z180 Arrays </UL> <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/z180faq.pdf"> Z180 Frequently asked questions (PDF)</A> <LI><A HREF="http://theorie3.physik.uni-erlangen.de/~aoppelt/z80/hardware/data/intermem.pdf"> Z180 memory interfacing (PDF)</A>  <LI><A HREF="http://www.techweb.com/se/directlink.cgi?EET19980914S0031"> In the Sept. 14th edition of EE Times is an article about the new Z180 supplier.</A> The company is AB Semicon UK Ltd., based in the UK. <LI><A HREF="ftp://oak.oakland.edu/pub/cpm/z280/"> OAKLAND CP/M-Archive: Z280 ( FTP )</A> <BR>Take your choice <LI><A HREF="http://barleywood.com/papers/"> Guide to Z80 I/O Programming:</A> <UL> <LI><A HREF=ftp://barleywood.com/pub/papers/1653.doc> Z80 Family Interrupt Structure ( FTP )</A> <UL> <LI><A HREF=http://www.geocities.com/SiliconValley/Peaks/3938/1653.doc> same, different URL (HTTP)</A> </UL> <LI><A HREF=ftp://barleywood.com/pub/papers/1656.doc> Serial Communications using RS232 ( FTP )</A> <UL> <LI><A HREF=http://www.geocities.com/SiliconValley/Peaks/3938/1656.doc> same, different URL (HTTP)</A> </UL> <LI><A HREF="http://www.msxnet.org/tech/Z80/"> Articles about Undocumented Features</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> <UL> <LI><A HREF="http://www.msxnet.org/tech/Z80/other.html"> The I and R Registers and Interrupts</A> <BR>by <A HREF="mailto:sean@msxnet.org"> Sean Young</A> </UL> </UL> </UL> <P><HR><P> <A NAME="SPECIAL_UPUC"> <H3><B>Special Items (uP/uC in general)</B></H3> <UL>  <LI><A HREF="http://www.ganssle.com/articles/article.html"> Articles ( HTML ) </A> <BR>by <A HREF="mailto:info@ganssle.com"> Jack G. Ganssle</A> <LI><A HREF="http://www.microsol.com/artindex.html"> Embedded Design Articles ( HTML ) </A> <BR>by Scott Rosenthal for Personal Engineering & Instrumentation News <UL> <LI><A HREF="http://www.microsol.com/pein9403.html"> System initialization requires as much care as the rest of your design ( HTML ) </A> </UL> </UL> <P><HR><P> <A NAME="SRC_OFFER"> <H3><B><FONT SIZE=+2>Source Code Examples ... </FONT></B></H3> <B>... in Assembly Language:</B> <UL>  <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80asm.htm"> Z80 Source ( HTML ) </A> Some routines for beginners <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <UL> <LI> <A HREF="http://home.interlink.or.jp/~robocom/z80.htm"> Z80 Programming ( HTML ) </A> same as before, but different format </UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80sourc.txt"> Z80 Source</A> Some routines for the more trained <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/pcdn.zip"> PCDN.ZIP (V 1.2 )</A> PC Download Z80-ASM <BR>Routines for the Z80 SIO Serial port <BR>by <A HREF="mailto:dibald@netcom.com"> Dave Baldwin</A> at <A HREF="mailto:tcj@psyber.com"> The Computer Journal</A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/math.zip"> Z80 MATH </A> Floating-Point Math Package for GameBoy or Z80 in Assembler, <BR>by <A HREF="jfrohwei@hiwaay.net"> Jeff Frohwein</A> <LI><A HREF="http://hiwaay.net/~jfrohwei/gameboy/"> GameBoy Technical Page - What's New?</A> <BR>by Jeff Frohwein <blink> (*) </blink>  <BR>Where is alot of coding info/programs to Z80 ? <LI><A HREF="http://www.dunfield.com/pub/alps.zip"> ALPS </A> Editor, Disassembler, and Debugger for 8080 <BR>by <A HREF="mailto:dave@dunfield.com"> Dave Dunfield</A> <LI><A HREF="ftp://ftp.armory.com:/pub/user/rstevew/Z80/hd64180.z80"> Info about HD64180 ( FTP )</A> </UL> <P> <B>... in C:</B> <UL> <LI><A HREF="ftp://oak.oakland.edu/pub/cpm/c/"> OAKLAND CP/M-Archive: C ( FTP )</A> <BR>Take your choice <LI>Device driver source code excerpts demonstrating the possibility of <B>interfacing a PC/AT Keyboard via a Z8530 SCC</B>. The driver was originally written entirely in C for LynxOS/68k. All SCC Register accesses are performed via macros, thus there is at least a theoretical chance of porting this code to a Z80-based environment. <BR>If you are interested/willing to port to Z80, you may contact <A HREF="mailto:rob@sysgo.de"> Robert Kaiser</A> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Bay/8302/"> Information on the PC/AT keyboard protocol</A> <LI><A HREF="http://www.semiconductors.philips.com/microcontrol/designercorner/80C51"> IBM-KBD <--> uC (AN434) </A> </UL> </UL> <P><HR><P> <A NAME="SRC_REQUEST"> <H3><B>Source Code Requests from you</B></H3> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80req.htm"> Z80 Software Request ( HTML ) </A> </UL> <P><HR><P> <A NAME="PROJECT"> <H3><B>Projects</B></H3> <UL> <LI><A HREF="http://www.blkbox.com/~jdb8042/SmallSys/8bitIDE.html"> Small IDE for Z80 systems ( HTML ) </A> <BR>by <A HREF="mailto:jdb8042@blkbox.com"> John D. Baker</A> <LI><A HREF="http://aix1.uottawa.ca/~vdbergen/prdescr.htm#loc_z80"> Z-80 controlled, stand-alone, ten-cage animal activity/locomotion monitoring system - IR beams ( HTML ) </A> <BR>by <A HREF="mailto:vdbergen@uottawa.ca"> Herman van den Bergen</A> <LI>Articles and Contributions <BR>by <A HREF="mailto:HalBower@worldnet.att.net"> Hal Bower</A> <UL> <LI>CP/M Portable with LCD <LI>CD-ROM on CP/M System  <LI><A HREF="z80os.htm#OS_MT_UZI_HB"> UZI180 Operating System</A> </UL>  <LI><A HREF="http://www2.whidbey.net/~beattidp/comput/z380/"> Build your own Z380 computer ( HTML ) </A> <BR>Z380-based Computer System: Schematic and Board Layout <BR>by <A HREF="mailto:beattidp@whidbey.net"> Douglas Beattie Jr.</A> <LI>Articles and Contributions <BR>by <A HREF="mailto:rjc00@juts.ccc.amdahl.com"> Rick H. Chalfant</A> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/multtask.htm"> Article about how to make a Z80 multitask system ( HTML ) </A> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80robot.htm"> Z80 multitasking robot system ( HTML ) </A> <BR>3 microphones for direction control, wireless remote and more </UL> <LI><A HREF="http://www.aeneas.net/ais/hathaway/"> TRS-80 CoCo III IDE Project Home Page</A> <blink> (*) </blink> <BR>by <A HREF="mailto:hathaway@aeneas.net"> Jim Hathaway</A> <A HREF="http://www.dontronics.com/download.html"> Download Dungeon for MicroControllers and Electronics</A> <BR>Z80 Source Code for Interfacing 4Mb Drams, Development System, etc. About 15 years of Z80 code ramblings including Z80 Tiny Basic. <BR>by <A HREF="mailto:don@dontronics.com"> Don McKenzie</A> <LI>Articles and Contributions <BR>by <A HREF="mailto:Jens.Madsen@post3.tele.dk"> Jens Dyekjµr Madsen</A> <UL> <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/jmnomem.htm"> Z80 Systems without alterable Memory ( HTML )</A> <BR>explains how to make it more efficient than most Memory Systems <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/jmz80.htm"> Z80 SRAM ( HTML ) </A> <BR>This page shows how it is possible to connect a SRAM and an EPROM in series (?) for a Z80 processor system <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/jmz8boot.htm"> Z80 bootloader ( HTML ) </A> Boot the Z80 CPU from PC via LPT <BR>complete Docs and Software (Pascal) </UL> <LI><A HREF="http://users.bart.nl/~mpsyn/"> Z80 Project</A> Z80 Board controlled by the PC parallel port <BR>by <A HREF="mailto:online@octagon.demon.nl"> Octagon</A> rsp. Tjaco Mast <LI><A HREF="http://www.racine.ra.it/itis_ra/labsitel/lb_si_te.htm"> Z80 board for educational purpose (Italian HTML )</A> <BR>by <A HREF="mailto:itbaldini@provincia.ra.it"> Maurizio Montanari</A> <BR>There you can find also a PC-DOS application that communicates with the board to control various functions, like stepping of code and register contents: <UL> <LI><A HREF="http://www.racine.ra.it/itis_ra/labsitel/doc/schedaz80/dbz80.htm"> Sistema di sviluppo "home" per Z80 (Italian HTML )</A> </UL> <LI><A HREF="http://www.ucds.demon.co.uk/z80.htm"> Z80 CPU Controller Project ( HTML ) </a> Z80 based control unit primarily designed for operating and monitoring various aspects of home life <BR>by <A HREF="mailto: tonym@ucds.demon.co.uk"> Tony Moore</A> <LI><A HREF="http://www.keycomm.it/users/moretti/"> Tasto telegrafico computerizzato con Z80 (Italian)</A> <BR>by Emilio Moretti (ik1wjq) <LI><A HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80_mp.htm"> Schematics, PCB-Layout, etc for a small Z80 system (Italian HTML, with an overview in English ) </A> <BR>by <A HREF="mprato@iqsnet.it"> Mario Prato</A> <li><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80first.htm"> First Z80 System ( HTML ) </a> <BR>by <A HREF="mailto:scherrer@hotmail.com"> Thomas Scherrer</A> <li><a HREF="http://www.geocities.com/SiliconValley/Peaks/3938/z80nicd2.htm"> Z80 NICD Computer ( HTML ) </a> Super smart NICD computer charger <BR>by Thomas Scherrer and <A HREF="mailto:kentex@mail.danbbs.dk"> Kenny Andersen</A>  <LI><A HREF="http://www.babytalk.demon.co.uk/zx80/zx80.html"> How to build your own ZX80/ZX81!</A> <BR>by <A HREF="mailto:grant@babytalk.demon.co.uk"> Grant Searle</A> <UL> <LI><A HREF="http://www.babytalk.demon.co.uk/zx80/activities.html"> The ZX80 hardware page</A> <LI><A HREF="http://www.babytalk.demon.co.uk/zx80/zx80nmi.html"> ZX80 to ZX81</A> </UL> <LI>Homebrew Z*80 Systems <BR>by <A HREF="mailto:sw@cellware.de"> Stefan Wimmer</A> <UL> <LI><A HREF="http://www.geocities.com/CapeCanaveral/6368/wswcpm.html"> First (and still running) "Woodcase" CP/M system</A> <LI><A HREF="http://www.geocities.com/CapeCanaveral/6368/mops280.html"> MOPS280 Prototype</A> </UL> <LI><A HREF="http://www-student.lboro.ac.uk/~cosam/z80.html"> Build your own Z80 computer ( HTML ) </A> <BR>by an anonymous tinkerer  <LI><A HREF="http://www.dnai.com/~jfox/fpgakit.htm"> Check out for a very modern use of a Z80</A> <BR>reported by <A HREF="mailto:msimon@tefbbs.com"> Simon</A> </UL> <P><HR><P> <A NAME="HDT"> <H3><B>Hardware Development Tools</B></H3> <UL> <LI><A HREF="http://www.vautomation.com"> Sinthesizable Z80 core ($)</A> <BR>Make your own Z80 CPU chip with help of <BR>VAutomation Inc. <A HREF="mailto:eric@vautomation.com"> Eric Ryherd</A> </UL> <P><HR><P> <A NAME="DISTRIBUTOR"> <H3><B>Chip Distributors</B></H3> <UL>  <LI><A HREF="http://www.jdr.com"> JDR</A> <BR>There is a drop-down box labeled "Select a Catagory". Pop open the list and select "Components". Scroll down until you get to the "Integrated Circuits" section. Near the end of that section, you'll find a listing for "Z80series micros and support" . Click on the hand pointing to the text (it doesn't look or act like a traditional button) and you will see a listing of all the Z80 series stuff JDR sells. <BR>Reported by <A HREF="mailtotnewman@news.cmc.net"> Tony Newman</A> <LI><A HREF="http://www.mobicon.com/catalog1/p21.html"> Mobicon 8BIT CPU/MPU: Get the Z80 CPU Here ($ HTML ) </A> <LI><A HREF="http://www.stocknsource.com"> Specialized in hard to find ICs and Semiconductors</A> </UL> <P><HR><P>  <A HREF="#TOC"> <IMG ALIGN=bottom SRC="http://www.uni-karlsruhe.de/Icons/Arrows/up.gif" ALT="Table of Contents"></A><A HREF="z80.htm#TOP"> <IMG ALIGN=bottom SRC="http://www.uni-karlsruhe.de/Icons/Arrows/left.gif" ALT="Start of Z80 Home Page"></A><A HREF="http://computer.freepage.de/lskade/"> <IMG ALIGN=bottom SRC="http://www.uni-karlsruhe.de/Icons/Uni/ico_home.gif" ALT="Home Page of Leonhard Schneider"></A><A HREF="http://www.uni-karlsruhe.de"> <IMG SRC="http://www.uni-karlsruhe.de/Icons/Uni/ico_uni.gif" ALT=" [Uni-Startseite] "></A><A HREF=""> <IMG SRC="http://www.uni-karlsruhe.de/Icons/Uni/ico_leer.gif" ALT=" [ ] "></A><A HREF="http://computer.freepage.de/lskade/form/mail2_en.htm"> <IMG ALIGN=bottom SRC="http://www.uni-karlsruhe.de/Icons/Uni/ico_mail.gif" ALT="e-Mail"></A> <BR><A NAME="end"> <P><HR><P> <ADDRESS> L. Schneider<BR> lskade@hotmail.com<BR> http://computer.freepage.de/lskade/ue/Z80/z80.htm <ADDRESS> </BODY> </HTML>