ftp.barnyard.co.uk/2015.02.ftp.barnyard.co.uk.tar/ftp.barnyard.co.uk/cpm/walnut-creek-CDROM/CPM/Z280/ZEDUX280.LBR/ZNEWS.TZT/ZNEWS.TXT

Text File | 2000-06-30 | 15KB | 278 lines

ááááL----!----!----!----!----!----!----!----!----!----!----!----!----!----R

ááááContent≤ oµ filσ e4:REMOTE:ZNEWS.TXT:

                          GENERA╠ UPDATE║ June¼ 1987

ááááChi≡ avalibilit∙ (Z280):

ááááZilog'≤á officia∞ datσ fo≥ "volumeó shipmen⌠ oµ thσ Z28░ chi≡ ha≤á beeε ì
ááááse⌠ fo≥ September¼á 1987«á Unti∞ tha⌠ time¼á product≤ froφ thσá variou≤ ì
áááásuppor⌠ manufacturer≤ wil∞ bσ iε shor⌠ supply«á Ziloτ i≤ presentl∙ onl∙ ì
ááááshippinτ samplσ quanities¼ anΣ worΣ froφ thσ peoplσ wh∩ cal∞ mσ i≤ tha⌠ ì
ááááthe∙ n∩ longe≥ wil∞ shi≡ thσ sample≤ freσ oµ charge.

ááááThσá impac⌠á oε Zedu° i≤ thσ samσ a≤ ha≤ beeε fo≥ quitσ somσá time║á wσ ì
áááágenerall∙ caε onl∙ shi≡ t∩ person≤ alread∙ iε possesioε oµ ß Z280.

ááááChi≡ avalibilit∙ (▒ ME╟ DRAM):

ááááThi≤á onσá i≤á makinτ thσ news║á ß recen⌠ articlσ iεá thσá Wal∞á Stree⌠ ì
ááááJourna∞ (dateΣ junσ 22¼ 1987⌐ state≤ thσ worr∙ oµ ß genera∞ shortagσ iε ì
ááááDRAM≤ duσ t∩ thσ manufacturinτ cu⌠ - bacδ iε Japan« Wha⌠ doe≤ thi≤ meaε ì
ááááfo≥á ▒á ME╟ DRAMs┐á Oµ thσ peoplσ wσ havσ talkeΣ to¼á thσ onl∙á compan∙ ì
áááápresentl∙á shippinτ AN┘ ▒ meτ dram≤ i≤ Fujisu«á A⌠ las⌠á contact¼á the∙ ì
ááááclaiφ tha⌠ thσ US┴ ha≤ hunτ theφ u≡ fo≥ aε impor⌠ permit«á I⌠ ma∙á als∩ ì
áááábσá tha⌠ thσ ▒ meg≤ arσ par⌠ oµ ß Japanesσ "retaliationó iε ou≥á littlσ ì
áááátradσ war«á T╔ Semiconducto≥ say≤ the∙ arσ onl∙ shippinτ sample≤ t∩ thσ ì
áááámilitary.

ááááOK¼á wh∙ shoulΣ Zedu° care┐ Well¼ thσ ideß oµ ou≥ apdapte≥ boarΣ wa≤ t∩ ì
ááááge⌠á thσ sizσ dowε t∩ thσ absolutσ minimuφ (it'≤ 4.28ó b∙ 2.24")«á Thi≤ ì
áááái≤á thσá ke∙á t∩ fittinτ a≤ man∙á differen⌠á system≤á a≤á possible«á T∩ ì
ááááaccomplisΦá this¼á wσ madσ usσ oµ thσ industr∙ standarΣ SI╨ ╕ bi⌠á draφ ì
áááápackage«á Thσá board≤ accep⌠ eithe≥ ß 256kΓ o≥ 1mΓ draφ versioε oµ thi≤ ì
áááápackage.

ááááUsinτ 256kb¼á 128kΓ oµ thi≤ wil∞ bσ takeε u≡ b∙ thσ R╨ operatinτ systeφ ì
áááá(fo≥á R╨ users)¼á leavinτ tw∩ 64kΓ use≥ partitions«á Thi≤ i≤á typicall∙ ì
ááááadequatσ fo≥ ß singlσ use≥ witΦ multiplσ tasδ capabillity.

ááááFo≥ multiplσ task¼á multiplσ use≥ capabillity¼ 1mΓ versioε wil∞ providσ ì
áááámorσ breathinτ room.

ááááI⌠á certainl∙á appear≤á tha⌠ thσ 1mΓ draφ anΣ thσá Z28░á processo≥á arσ ì
áááábasicall∙á iεá thσá samσá statσá (sampling)¼áá therefore¼áá i⌠á i≤á no⌠ ì
ááááunreasonablσá t∩ expec⌠ tha⌠ wheε wσ havσ gooΣ quanit∙ oµ one¼á wσ wil∞ ì
ááááhavσ thσ other.

ááááThσ Z28░ t∩ Z8░ adapters:

ááááWσ no≈ havσ tw∩ version≤ oµ thσ adapte≥ board║á Thσ "straightó adapter¼ ì
ááááanΣá thσ coprocesso≥ version«á BotΦ thesσ board≤ arσ thσ samσ sizσá anΣ ì
áááábasiπ layout« OnboarΣ i≤ ß Z280¼ ß 256kb/1mΓ dram¼ anΣ thσ Z8░ adaptioε ì
áááásocket.
è
ááááOε thσ straigh⌠ adapter¼á thσ boarΣ REPLACE╙ thσ Z8░ iε thσ hos⌠ systeφ ì
áááácompletely«á Thσ address¼ datß anΣ contro∞ line≤ comσ directl∙ froφ thσ ì
ááááZ280¼á witΦá ß smal∞ amoun⌠ oµ translatioε b∙ onboarΣ logiπ t∩á correc⌠ ì
áááámino≥á incompatibilities«á Thi≤ boarΣ i≤ abou⌠ 95Ñ compatiblσ witΦá thσ ì
ááááZ8░ processor.

áááá100Ñá compatibilit∙ i≤ NO╘ POSSIBL┼ usinτ thσ Z28░ Z8░ compatiblσá modσ ì
áááá(anΣ Ziloτ ha≤ s∩ publisheΣ thi≤ fac⌠ iε compan∙ newsletters)«á Seσ thσ ì
ááááafte≥á - note«á Becausσ thi≤ versioε allow≤ ful∞ acces≤ oε thσ hos⌠á oµ ì
ááááthσ ne≈ Z28░ instructioε se⌠ anΣ onboarΣ peripherals¼ thi≤ i≤ thσ boarΣ ì
áááát∩á usσ fo≥ peoplσ wh∩ arσ evaluatinτ aε upgradσ t∩ thσ Z28░á processo≥ ì
ááááfroφá aε existinτ Z8░ design¼á o≥ iµ yo⌡ wisΦ thσ ful∞ performancσá anΣ ì
ááááusσ oµ thσ Z28░ processo≥ iε you≥ system« Thi≤ boarΣ i≤ recommendeΣ fo≥ ì
áááápeoplσ witΦ SENIO╥ HARDWAR┼ DESIG╬ LEVE╠ capabillit∙ anΣ ful∞ knowledgσ ì
ááááoµ thσ hos⌠ system.

ááááOu≥á owε usσ oµ thσ boarΣ herσ a⌠ Zedu° i≤ iε ß Cromemc∩ CP╒ S-10░á Z8░ ì
ááááprocesso≥á card«á Thσá modification≤ requireΣ fo≥ tha⌠ boarΣá werσá thσ ì
áááádisablinτ oµ thσ "automatiπ jumpó featurσ oµ thσ boarΣ (whicΦ madσ non- ì
áááástandarΣ usσ oµ thσ "floató statσ oµ thσ Z80⌐ anΣ ß changσ iε thσá wai⌠ ì
áááácircui⌠ (whicΦ ALWAY╙ starteΣ eacΦ cyclσ ofµ witΦ ß wait¼á regarles≤ oµ ì
ááááwhethe≥ ß wai⌠ wa≤ reall∙ required).

ááááIε thσ coprocesso≥ version¼á yo⌡ unpluτ you≥ presen⌠ Z80¼á pluτ i⌠ int∩ ì
ááááthσá adapte≥ card¼á theε pluτ thσ adapte≥ int∩ thσ vacateΣ Z8░á socket« ì
ááááThσá Z28░á i≤á isolateΣ froφ thσ hos⌠ Z80¼á anΣá behave≤á a≤á it'≤á owε ì
ááááprocessinτ subsysteφ witΦ it'≤ onboarΣ 256kb/1mΓ dram« Thσ hos⌠ Z8░ anΣ ì
ááááthσá Z28░ botΦ ruε a⌠ thσ samσ time¼á witΦ thσ Z80/hos⌠ performinτá al∞ ì
ááááI/╧á work¼á anΣá thσ Z28░ runninτ applicatioεá programs«

ááááCommunicatioεá betweeε processor≤ i≤ accomplisheΣ viß aε ╕ bi⌠ "inte≥ - ì
áááácpuóá communication≤á chi≡á (iεá fact¼áá ßá registereΣáá bi-directiona∞ ì
áááátransceiver)«á Thσ addres≤ oµ thσ coprocesso≥ por⌠ i≤ selecteΣ viß aε ╕ ì
áááápositioεá di≡ switcΦ oε thσ board¼á whicΦ set≤ onσ oµ 25╢ I/╧ port≤ fo≥ ì
ááááthσ boarΣ t∩ use«á Yo⌡ simpl∙ finΣ aε unuseΣ por⌠ iε you≥á system¼á anΣ ì
ááááse⌠ thσ switche≤ t∩ that« Wheε bootinτ u≡ thσ softwarσ disk¼ yo⌡ eithe≥ ì
ááááse⌠ thσ por⌠ yo⌡ selecteΣ b∙ option¼ o≥ b∙ defaul⌠ leavσ thσ settinτ a⌠ ì
ááááthσ defaul⌠ $FE (choseε t∩ bσ thσ mos⌠ commoε unuseΣ I/╧ port).

ááááThσá onl∙á computer≤ tha⌠ canno⌠ accep⌠ thi≤ boarΣ a≤ ß "pluτá anΣá goó ì
áááásolutioεá woulΣá bσ one≤ doinτ somethinτ VER┘ strangσ likσ usinτá EVER┘ ì
áááápor⌠á iε thσ Z80¼á o≥ wherσ therσ i≤ n∩ physica∞ rooφ fo≥á thσá adapte≥ ì
ááááboard.

ááááUtilizinτá thσá Z80/hos⌠á t∩ proces≤ I/╧ separatel∙ shoulΣá givσá speeΣ ì
áááágains«á Thσá disadvantage≤á oµ thi≤ arrangemen⌠ arσ thσá speeΣá penalt∙ ì
áááá(estimatσá 20Ñ oε I/╧ operations⌐ oµ passinτ datß vißá thσá coprocesso≥ ì
ááááport¼á thσá inablit∙á t∩á usσ thσ onboarΣ DM┴ t∩ hel≡ I/╧ iεá thσá hos⌠ ì
ááááprocessor¼á anΣá finally¼á thσá inabilit∙á t∩á makσá usσá oµá thσá Z28░ ì
ááááinstructioε se⌠ whilσ writinτ I/╧ drivers.

.paè
          AFTER  - NOTE: WHY CAN'T THE Z280 BE 100% Z80 COMPATIBLE ?


ááááThσ maiε incompatibilit∙ betweeε thσ Z28░ (iε thσ Z8░ bu≤ mode⌐ anΣ thσ ì
ááááZ8░ i≤ thσ actioε oµ thσ M▒ signal«á Oε thσ Z80¼á thi≤ linσ signal≤ thσ ì
ááááfetcΦ oµ thσ firs⌠ bytσ oµ aε intruction«á Oε thσ Z280¼á thσ pipelininτ ì
áááámechanisiφ i≤ continuall∙ fetchinτ aheaΣ oµ thσ curren⌠ P├ fo≥ thσ nex⌠ ì
áááábytes¼á eveεá beforσ thσ processo≥ need≤ theφ (s∩á calleΣá "prefetch")« ì
ááááThi≤ i≤ supposeΣ t∩ speeΣ thσ processor« Thσ Z280¼ then¼ doe≤ no⌠ know¼ ì
ááááa⌠á thσ timσ ß bytσ i≤ actuall∙ fetcheΣ froφ maiε memory¼á exactl∙ wha⌠ ì
áááái⌠ i≤ t∩ bσ useΣ for«á Therσ i≤ n∩ way¼ eithe≥ b∙ circuitr∙ interna∞ t∩ ì
ááááthσ Z280¼ o≥ externa∞ adaptioε hardware¼ t∩ generatσ ß truσ M▒ signal.

ááááThi≤ createΣ ß probleφ fo≥ Zilog╗á thei≥ owε pheriphera∞ chip≤ useΣ thσ ì
ááááM▒á linσá t∩á detec⌠ executioε oµá thσá "retióá instruction¼á t∩á rese⌠ ì
ááááinterrupts.

ááááS∩ ho≈ i≤ thi≤ probleφ solveΣ wheε M▒ canno⌠ bσ generateΣ oε thσ "retió ì
ááááinstructioε fetcΦ ┐á Thσ actua∞ fetcΦ oµ thσ "retió doe≤ not¼á iε fact¼ ì
áááágeneratσ ß M▒ signal« Instead¼ thσ CP╒ execute≤ thσ "retió b∙ runninτ ß ì
áááá"dumm∙á fetchó oµ thσ "retió instructioε again¼á bu⌠ thi≤ timσ witΦá M▒ ì
ááááset«á Thσ M▒ line¼ therefore¼ onl∙ i≤ activσ fo≥ thσ "retió instructioε ì
áááá(whicΦ  take≤ a⌠ leas⌠ twicσ a≤ lonτ t∩ executσ a≤ ß consequence).


CLOCK SPEEDS:

ááááConsiderablσá confusioεá ha≤ surroundeΣ thσ clocδ speeΣ ratinτá oµá thσ ì
ááááZ280«á Ziloτá rate≤á thσ curren⌠ to≡ Z28░ speeΣ a≤ 1░ mhz«á Yo⌡á won't¼ ì
ááááhowever¼á finΣá ß 1░ mh· clocδ oε an∙ oµ thσ Z28░ pinsíá Thσ XTA╠ speeΣ ì
ááááfo≥ thi≤ par⌠ i≤ 2░ mhz¼á whicΦ i≤ immediatel∙ divideΣ oε - chi≡ t∩á 1░ ì
áááámhz¼ thσ basiπ interna∞ clocδ speed.

ááááI⌠á ha≤ becomσ traditiona∞ t∩ ratσ CPU'≤ b∙ clocδ speed«á ┴ 2┤ meτá 28╢ ì
ááááshoulΣ bσ │ time≤ a≤ fas⌠ a≤ ß ╕ mh· 808╢ right┐ Thσ fac⌠ is¼ thσ inpu⌠ ì
ááááclocδ speed¼ whicΦ i≤ usuall∙ quoteΣ b∙ thσ manufacture≥ simpl∙ becausσ ì
áááái⌠á i≤ thσ highes⌠ anΣ thereforσ mos⌠ impressivσ statistiπ oµ thσ part¼ ì
ááááma∙á havσá littlσ o≥ nothinτ t∩ d∩ witΦ thσ actua∞ performancσá oµá thσ ì
áááápart« Mos⌠ oµ thσ seemingl∙ incrediblσ "speeΣ gainsó iε movinτ froφ thσ ì
áááátypica∞ 2-╢ mh· clock≤ oµ thσ olde≥ 8-bi⌠ CPU≤ t∩ thσ 2░ mhz½ speed≤ oµ ì
áááátoday≤ 1╢-bi⌠ processor≤ i≤ accountablσ t∩ thσ changσ froφ randoφ logiπ ì
ááááCPU≤ t∩ microcodeΣ CPUs« ┴ microcodeΣ CP╒ usuall∙ take≤ 1¼ 2¼ │ o≥ morσ ì
ááááinterna∞á "microcodesóá t∩á executσ aε externa∞ "macrocodeóá o≥á norma∞ ì
ááááinstruction.

ááááIµ thσ situatioε no≈ seem≤ muddy¼á however¼ i⌠ i≤ wortΦ reflectinτ tha⌠ ì
ááááthσ clocδ speeΣ NEVE╥ wa≤ aε accuratσ indicatioε oµ CP╒ power«á I≤ ß 1▓ ì
áááámh·á 803▒á twicσ a≤ fas⌠ a≤ ß ╢ mh· z8░ ┐á Obviousl∙ ß lo⌠á oµá factor≤ ì
ááááente≥á iεá t∩ CP╒ ne⌠ performance«á Thσ onl∙ reliablσá test≤á ßá forma∞ ì
áááábenchmarks¼ anΣ eveε thesσ arσ famou≤ fo≥ beinτ slanteΣ b∙ ß particula≥ ì
áááámanufacturer.
.paè
ááááClocδá speeΣá HA╙á beeε ßá traditiona∞á comparisioεá betweeεá identica∞ ì
ááááversion≤á oµ thσ samσ CPU«á Aε ╕ mh· Z8░ (Ziloτ ship≤ Z80'≤ al∞ thσ wa∙ ì
ááááu≡ t∩ 1▓ mhz⌐ i≤ reliabl∙ twicσ a≤ fas⌠ a≤ ß ┤ mh· Z80«á Thi≤ ha≤ ß lo⌠ ì
áááát∩ d∩ witΦ ho≈ stablσ thσ Z8░ famil∙ ha≤ beeε iε thσ past« Bu⌠ relatinτ ì
ááááthσá clocδá speeΣ oµ thσ Z28░ t∩ thσ clocδ speeΣ oµ ß Z8░á i≤á ßá clea≥ ì
áááámistake« Sincσ thσ Z28░ use≤ ß 2░ mh· XTAL¼ i≤ i⌠ 1░ time≤ a≤ fas⌠ a≤ ß ì
ááááZ8░ tha⌠ use≤ ß ▓ mh· clocδ ?

ááááFortunately¼á therσá i≤ ß wa∙ t∩ comparσ thσ Z28░ t∩ thσ Z8░ iεá speed¼ ì
ááááusinτá thσ Z280'≤ Z8░ compatiblσ bu≤ modσ (whicΦ doe≤ no⌠ appl∙ t∩á thσ ì
ááááZBU╙!).

ááááThσ Z28░ divide≤ thσ "basicó clocδ speeΣ oµ 1░ mh· dowε b∙ ▓ agaiε (thσ ì
ááááexterna∞á XTA╠á speeΣá divideΣ b∙ 4⌐ anΣ output≤ thi≤ a≤á thσá Z8░á bu≤ ì
ááááclock.

ááááThi≤á clock¼á anΣ thσ correspondinτ bu≤ cycles¼á arσ almos⌠ one-for-onσ ì
ááááwitΦ ß Z80« Thσ followinτ comparision≤ caε bσ madσ then:

áááá          Z80         Z280             -->> XTAL SPEED (MHZ)
áááá          --------------------------------------------
áááá          1           4
áááá          2           8
áááá          4           16
áááá          5           20  (maximum speed of current part)

ááááAccordinτ t∩ Zilog¼á thσ usσ oµ thσ dividσ b∙ ▒ bu≤ clocδ optioε shoulΣ ì
áááádelive≥ thσ following:

áááá          Z80         Z280             -->> XTAL SPEED (MHZ)
áááá          --------------------------------------------
áááá          1           2
áááá          2           4
áááá          4           8
áááá          6           12
áááá          8           16
áááá          10          20  (maximum speed of current part)

ááááThi≤á modσá require≤á externa∞ hardwarσ t∩ set«á Ok¼á s∩á thσá Z28░á i≤ ì
ááááequivalen⌠ t∩ ß 1░ mh· Z80¼á o≥ witΦ externa∞ hardware¼á ß 1░ mh· onσ ┐ ì
ááááNope«á Froφ herσ wσ mus⌠ discarΣ thσ clocδ speeΣ a≤ ßá comparitor¼á anΣ ì
ááááusσ ß benchmark.

áááá╔ havσ ruε thσ BYT┼ benchmark¼á whicΦ calculate≤ primσ numbers¼á oε thσ ì
ááááZ280«á WitΦ cachσ disabled¼á thσ Z28░ run≤ almos⌠ exactl∙ a≤ fas⌠ a≤á ß ì
ááááZ8░á O╞á TH┼á SAM┼ BU╙ CLOC╦ (no⌠ XTA╠á clock!)«á WitΦá cachσá on¼á thσ ì
áááábenchmarδ run≤ almos⌠ exactl∙ twicσ a≤ fas⌠ (thσ exac⌠ time≤ arσ rathe≥ ì
ááááirrelivant¼á a≤á tha⌠á woulΣ mainl∙ bσ ß tes⌠ oµá compile≥á efficency)« ì
ááááAssuminτá thσ eliminatioε oµ thσ bu≤ clocδ divisioε gain≤ anothe≥ speeΣ ì
áááádoubling¼á anΣ thσ usσ oµ thσ 1╢ bi⌠ ZBU╙ modσ vs«á thσ ╕ bi⌠ Z8░á modσ ì
áááádouble≤á thσá speeΣá ye⌠á again¼á witΦ al∞ thσ trimming≤á thσá Z28░á i≤ ì
ááááequivalen⌠ (iε theor∙!⌐ t∩ ß 4░ mh· Z8░!
.paè
ááááThi≤á i≤ no⌠ eveε takinτ int∩ accoun⌠ thσ fac⌠ tha⌠ thσ codσá coulΣá bσ ì
áááárewritteεá t∩á takσá advantagσ oµ thσ new¼á mucΦá morσá powerful∞á Z28░ ì
ááááinstructioε set¼ o≥ thσ burs⌠ bu≤ fetcΦ mode.

ááááR╨ - TH┼ FIRS╘ (AN─ RIGH╘ NO╫ ONLY⌐ Z28░ OPERATIN╟ SYSTEM:

ááááWitΦ thσ bringinτ on-linσ oµ thi≤ BBS¼á thσ ne≈ multi-user¼á multi-tasδ ì
ááááversioε oµ RP/═ i≤ no≈ gettinτ it'≤ firs⌠ ful∞ useage«á I⌠ i≤ describeΣ ì
ááááelsewherσá oε thσ bbs¼á anΣ yo⌡ arσ inviteΣ t∩ pla∙ witΦ i⌠ on-linσá t∩ ì
áááátr∙ ou⌠ it'≤ man∙ features.

ááááS∩ wherσ diΣ R╨ comσ froφ ┐á RP¼ o≥ Remotσ Partition¼ starteΣ ou⌠ doinτ ì
áááájus⌠ wha⌠ it'≤ namσ says«á ╔ wa≤ caugh⌠ betweeε aε application≤ prograφ ì
áááátha⌠á wa≤ gettinτ bigger¼á anΣ ß "TPAó tha⌠ wa≤á gettinτá smaller«á Thσ ì
ááááartificia∞á 64kΓ limitatioε wa≤ increasingl∙ painfull«á Havinτ examineΣ ì
ááááthσ "Z800ó advancσ spec«á (iε latσ 1985)¼á anΣ havinτ obtaineΣ ßá 256kΓ ì
áááámemor∙ board¼á ╔ se⌠ u≡ ß quicδ fi° tha⌠ woulΣ carr∙ forwarΣ readil∙ t∩ ì
ááááthσá Z280«

ááááThσá basiπá ideßá witΦ ß remotσ partitioε i≤ t∩á ruεá thσá application≤ ì
ááááprograφ iε it'≤ owε 64kΓ partition¼á witΦ littlσ o≥ n∩ memor∙ takeεá u≡ ì
ááááb∙ thσ system«á Afte≥ ß while¼ i⌠ becamσ convenien⌠ t∩ includσ thσ CP/═ ì
áááámonito≥ function≤ iε thσ program¼á theε t∩ extenΣ theφ pas⌠ thσá rathe≥ ì
áááálimiteΣ CP/═ modes«

ááááFinally¼á multiplσá taskinτ wa≤ addeΣ a≤ ß mean≤ t∩ usσ thσ othe≥á 64kΓ ì
áááápartition≤á available«á Wheε ╔ go⌠ holΣ oµ ß Z28░ samplσ iε earl∙ 1987¼ ì
ááááthσ systeφ underwen⌠ ß majo≥ upgrade¼ t∩ adΣ multiplσ users¼ usσ oµ thσ ì
ááááZ28░á memor∙ managemen⌠ anΣ onboarΣ pheriphals¼á anΣ RP'≤ owεá "nativeó ì
ááááoperatinτ systeφ interface.

ááááR╨ incorporate≤ man∙ feature≤ tha⌠ the∙ stil∞ sa∙ thσ IB═ P├ wil∞ ge⌠ ì
áááá"an∙á timσá now"¼á anΣá iεá genera∞ introduce≤á man∙á mainframσá - typσ ì
áááásoftwarσ concept≤ t∩ thσ microcompute≥ world.

ááááH╔ - TECH╗ TH┼ UPGRAD┼ PAT╚ FO╥ TH┼ KAYPRO:

ááááSomσá timσ ago¼á ╔ talkeΣ t∩ ß compan∙ planninτ t∩ marke⌠ ß boarΣá mucΦ ì
áááálikσ ou≥ adapter¼á bu⌠ specificall∙ designeΣ fo≥ thσ Kaypro« Thi≤ make≤ ì
ááááß lo⌠ oµ sense╗á sincσ Kaypros¼á likσ thσ IB═ PC¼á arσ basicall∙ alike¼ ì
ááááthσá boarΣá caε bσ designeΣ iε t∩ thσá physica∞á spacσá available¼á anΣ ì
ááááthereforσá incorporatσá morσá feature≤á thaεá thσá generiπá version«á ╔ ì
ááááunderstanΣá tha⌠á thσ boarΣ als∩ correct≤ somσ basiπ problem≤ witΦá thσ ì
ááááKaypr∩ screeε drivinτ arrangement« Therσ i≤ n∩ wa∙ tha⌠ onσ compan∙ caε ì
áááápossibl∙ cove≥ al∞ thσ bases¼ anΣ addres≤ ever∙ CP/═ typσ compute≥ eve≥ ì
áááámadσ individually.

ááááThσ CP/═ worlΣ wasn'⌠ buil⌠ b∙ onσ manufacturer«á ╔ thinδ thσ H╔ - TEC╚ ì
ááááexamplσ i≤ ß gooΣ onσ fo≥ entrepeneuria∞ type≤ iε thσ CP/═ » Z8░ world« ì
ááááFo≥á eacΦá individua∞ machinσ therσ i≤ neeΣ fo≥ hardwarσá anΣá softwarσ ì
áááádriver≤ t∩ hel≡ thσ Z280«á H╔ - TEC╚ ha≤ discusseΣ witΦ u≤ interes⌠á iε ì
ááááthσ R╨ O/╙ fo≥ tha⌠ board« An∙ new≤ oε H╔ - TEC╚ o≥ simila≥ project≤ i≤ ì
ááááwelcomσ here.
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ááááQUESTION╙ ?

ááááWσ neeΣ t∩ star⌠ gettinτ somσ interestinτ use≥ feedbacδ here╗ pu⌠ thosσ ì
ááááquestion≤á abou⌠á thσ Z28░ processo≥ herσ iεá thσá appropriatσá messagσ ì
ááááfile¼ eveε iµ yo⌡ alread∙ founΣ thσ answer« Other≤ haven't« Comσ ta≡ m∙ ì
áááá╢ month≤ oµ hand≤-oε experiencσ witΦ thσ Z280.


ááááz280info>╛ CommanΣ (B/F/R/S/W/E/C/G/H/?):

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