Tandy's Little Wonder (1993)(Farna Systems).pdf - TRS-80 Color ...

writing conventions used in this book....In the course of writing, some standards were set so as notto confuse the reader.* Hardware modifications, upgrades, and repairs arereferred to throughout this book. At times, the referencesgiven may not seem clear. They are written in such a way thata person with some understanding of electronics and theCoCo can easily figure out what to do. If you do notunderstand the directions, you probably should not attemptthe operation alone... get help! THE AUTHOR,PUBLISHER, NOR PRINTER ARE RESPONSIBLE INANY FASHION FOR THE RESULTS OF ANYPROJECTS OR REPAIRS MENTIONED IN THISBOOK, TO INCLUDE BODILY HARM, LOSS OFEQUIPMENT, OR LOSS OF DATA!* All references to hexadecimal addresses are written as“&Hxxxx”. The “&H” is used to precede the actual hexadecimalvalue when poking into memory to let the computerknow the value will be in hexadecimal. Some other texts usea dollar sign ($) in front of a value to mark it as beinghexadecimal, others use an asterics (*) or don’t mark it at all,as eight bit hexadecimal values usually contain numbers andletters.* When Radio Shack lists an item mentioned in theircatalog (especially parts), the part number will be listed inparentheses. This is not to encourage patronage of RadioShack, but there is a Radio Shack in or near almost everytown across the U.S. One would be better served to find anelectronics parts store with a better small parts stock thenRS, or mail order parts from one of the following:All Electronics Corp.P.O. Box 567Van Nuys, CA 91408Order phone 1-800-826-5432, call for catalog. Minimumorder is $10 plus $3.50 shipping and handling.Mouser Electronics2401 Hwy 287 NorthMansfield, TX 76063Phone 817-483-4422, call or write for catalog.Digi-Key Corp.P.O. Box 677Thief River Falls, MN 56701-0677Order phone 1-800-344-4539. No minimum order, minimumshipping charge of $5 (no shipping if order over $25).No Motorola chips listed, but will supply non-listed items ifavailable. Volume discounts for orders over $100.Jameco Electronics1355 Shoreway RoadBelmont, CA 94002Order phone 415-592-8097, call for catalog. $20 minimumorder plus 5% shipping and handling. Catalog usually hassome IC pin-out information and RAM/EPROM cross reference...good reference source.* The following abbreviations are used:A/L - Assembly LanguageANSI - American National Standards InstituteASCII - American Standard for Computer Information InterchangeBASIC - Beginners All-purpose Symbolic Instruction CodeBPS - Bits Per SecondCCx - Color Computer, x = 1, 2, or 3CMOS - Complimentary Metal Oxide Silicon (chip construction)CoCo - Color ComputerCPU - Central Processing Unit (actual processor chip)DECB - Disk Extended Color BASICDOS - Disk Operating SystemDRAM - Dynamic RAMEDTASM or EDT/ASM - Editor/Assembler, usually theTandy productEMAIL or E-Mail - Electronic MailEPROM - Electronicly Programmable Read Only MemoryGIME - Graphics, Interrupt, Memory Enhancement (chip,in CC3)GUI - Graphic User InterfaceIC - Integrated Circuit (a “chip”)I/O - Input/OutputM/L - Machine LanguageMPI - Multi-Pak InterfaceMS - Milli-Seconds (millionths of a second)MS-DOS - MicroSoft Disk Operating SystemNMOS - Negative Metal Oxide Silicon (chip construction)OS - Operating SystemOS-9 - Operating System (for the 680)9PIA - Peripheral Interface AdapterPCB - Perforated Circuit BoardP/S or PS - Power SupplyRAM - Random Access Memory, usually meaning DRAMROM - Read Only MemoryRS - Rat Shack... er... Radio Shack (division of Tandy Corp.)SAM - Synchronous Address MultiplexerSECB - Super Extended Color BASICSIG - Special Interest GroupSP - Slot Pak (also used for Slot Pak II)VDG - Video Display GeneratorVOM - Volt and Ohm Meter (multimeter)WYSIWYG - What You See Is What You Get(and probably others not listed!)page 4Tandy's Little Wonder