‘ aaanaimana renee ro eae re ‘ Carry Carry 2 10 add Linit value __ Aka to requested addr Limit Value. and carry | 13 to 16 11 « 1Kx4 Add limit value Linit Value to requested addr |: 9 to 12 1 to 6 tested by Ram tests. Failure is either 1Kx4 RAM, LS2u5 transceiver, or L$373 «00x. Displayed error will show RAM, LS245, and then LS373 (in that order), 7 to 9 tested by functional tests, those expected. IKx4 Base Value rd 1Kx4 Control Exp. SP_R/W, Stk 7 Add Base value 5 aKna "| Base Value and carry T sary 1Kx4 and requested addr 17 to 20 ‘Add Base value and carry 13 to 16 Base Value Requested address The failure will display the 283 Adder. 10 to 11 by functional tests, limit failures and Getermine if the adders are working correctly. The failure will display the 283 Adder. 1-8 addresses actually accessed must agree with legal values are both used to Actual address 17 to 20 Actual address — 13 to 16 man 1-8 “LISA 175 MMU 21 23 Alg A18 ‘Al? BRB ALS als al7 A21 423 Alg Als Al7 | fa) cs 0 p02 EXP ay Dee | SP A2 03 | R/U e— aS 004 STK a IK ie) x » % Abit a7. @ RAM ; 40 DOL L13 al Al Dg2 L14 Az A2 ~ 203 115 A3 03 004 L16 Ad 04 6 1K Als —— Bt % x Al4 ———i B2 Als ———j B3 . 4 bit als —— 84 1 RAM bol i) al nt oe L10 a2 02 Des t11 03 004 L12 Ad 4 a3 ae’ Aq oo ——i BL €3 6 1K alo ——4 82 6 x all-—— 63 av. 4bit Al2—— Ba 48 RAM a21 A22 A23 SEGO SEC1 SEG2 A20 alg Als Al? 21 azz A23 SEGO SEG1 - SEG2 A20 alg ALS Al7 As A17 cs 0 pg. -}-——~—817 —] AL Al 002 ->———~-B1g —} A2 093 -}——B19—] as ‘ fe 004 p20-——1 aa. EA naz AB OS E2 -——— NALS MK in > £3 [-——HALS 6 | ee " 4 bit, B3 B4 A RAM V a . —> 6s / pg. B13 a G4 0 a oge Bl4a—— 2 me ry pgs B1S As 004 Bi6b—{ ag fo 8 ad ees a al 4 __] 3 2 S 1K Als Blogg YO f-— NALS ox a4 ——| 82 a3 ¥2 [— 1A geaefi 4 bit As ——| 83 RFS —1p9 © -Y2 F— MALS a7 ALG ———| B4 gg RF6 181 Y3 F-— ALG @ RAM RF? —— 82 09 RFS | BS cs pa. -—~—89 ——J ay C4 0 mUX a pez b1o-—] A2 “| 2 09s B1L . El wm § a3 094 612 £2 Al “ 1K w—| 61 he bel YO F— HAS x aio 82 yLI— Hato — > 6 A bit All ——| 83 H Fl — Bo Y2 — MALL lar alz——| ba RF2—J 61 Y3}-— MAL2 (6 RAM vad Rr 82 e 5 Rea B3 4 CAS PAL Equations: x x x x x ¥ 0 1 : 2 co 9 (0) tl 12 3 14 11s t16 UL? j L J 1 J ] 71 PT é “Li_RESH _— _ , RAUX { of ~ | yRASr CTI Po HUK 1 eee CAS CC DJACK ae BERR: a CYST _ ROE : cash oo ee i wnnu . 5245 575 : _ HUTS _ — erresh CYST = AS SP PUCK RFSH ROUX + CYST OTADK + cyst cpuck = FR ress cgi : RASO = Be GPUCK RFSH RRUX Al? Al@ AIS « CYST RAGO + RIWUK RESH ~ _REUK RESO ‘ RAS1 = AS SP CPUCK RFSH UK «© Al AL + CYST RAS1 + RIUX RFSH + RIUK RASL Wet sas & CPURK RFSH AUK a7 AIG ALS + as SP CPUCK AFSH RBUK AIT eae AIS ~ CYST RAS2 * RMUX RAS2 + RASO RAS3 RASS = AS SP CPUCK RFSH WK = ALB AIS + CYST RAS3 + RMUX RAS3 + RASO RAS3 RAS4 = AS SP CPUCK RFSH AUK ai7 Als ALD ~ as @ GBuCK FSH HU AI? ALO AN9 * CYST RAS4 + RMUX RAGA + RASO RASS RASS = AS SP PUCK RFSH RIUX Als ALS + CYST RASS + RMUX RASS + RASO RAS3 RNUX = AS RFSH CPUCK + AS RFSH CPUCK …

Date: March 1~, 1983 · To: I.Jayne Rosing Ken Okin ,. Jon Fitcn Ron HOchsprung l.Jendell HenrY. Riek Meyers · Ricn"'Page Bruce Daniels vn1ke Urquhart Art BenjaPtin Paul Baker Am Nunziata IJOlfgang Dirks 200 Fr1:>Pt: Gary Marten • Sutlj: Vl.. 75 ·• • I Here is wnat is nopefull~f close to t~ final def ini t1on of 1. 75. As you recall, 1. 75 is the . currtmt Lisa wi tn a new logic cage assel'1ll y and a neY disk drive asserilly. • . . (} ~ ~"'t- syster1 cmr1CJ.II'a't1Cl'1 o 10 MHZ 68010 prt:>eessor o 720 x· 364 videO display 10 MB ou1lt-1n tiara OlSk . . . Built in floppy disk ·. o o a o o o 0 MMU witn 512 byte paoes ~ & °'ho~t Hth 'i1~/.e4 ·~ "4' h~zz-~ 6Z'Z 7-j~eYr ? '-' fA.e-·<t.. ""v-e tA.-5-e.o/ ex.fev-~,·vefy. . , L,,, A .1&p~/ff1~'~b'~/'--~ ~ ) ....,. (3) wh1'cL 128/256 Kbytes FQ1 ~ jiyllf-?~J! 0\:..-e / · little rore difficult, but dOatJle. To ca•pensate for tne 2 regaeyte 11M:itation ~f the 512 byte page. scnerra, anotner 2 Plegat)yte aaaress space has Deen added, for a tot.al of 4 regat>ytes of aCJCJress space. The stanaara PePDry cycle tire will De soons, 1ncluaing tif'ltl tnrough the MMU. Po?:lty Errors It "3s earlier tnougnt thiat Motorola h~ corrected the proDleM tnat 1ntt:tb1ts us froPt generating cus errors aue to rwerory parity errors. This is not the case nowever. Therefore the current, SCneMe of generating an NMI on a parity error will nave to rera1n . 01·1ves The design of 1.75 rias·reuea on contl'Olling tne floppy d1Sk i-1itn tne 68000.. This dOes not appt'8r to be a Protllf!t'f. · Th!3 hard dlsk w111 prObabJly also t:>e controlled directly by tne 68000, tn1s elMi.nates tne prOblet'lS of r"1ss1ng 1nter1eves dUe to excess! ve recopying of aata1 at slow rates. · · Review There will be a review of 1.75 on Tue&$y, Maren 22~ at 3:30 in The Big Apple. ? ~h>vi~. 1vt ~ t/ ,~ c/,~? ~~/~ Dual serial por1:s Y~ _,,,,, tft.) · Parallel Port (j.f n~)& of C-'llW'~e.' ,;.,.. ex~ "' Mt!!- -&f1oi..t w'(/'l,i 'hMh F' 10,,.,..., 896 Kbytes RAM The tllJ ancJ MePmy Addles,s Space The 512 byte page size will rel'191n.- This P&<es the use of 256K RAMS a 01~~ ,/J Those interestea aire welcorwa. ·1.75 .Me~mory ConfiguratiQns Uith 2-2 t1eqabyte ftapped address sp~s with 512 byte resolution :3/ 4 Megabyte 1'1ePH::>ry t1oard First 2 negaDyte addre~S ·o on Board RAM 3141. 3/4 MB space 2" 0 Second 2 !Megabyte Slot 4 ~ 1 ·rs lft ... address space Slot 5 - 1 MB 2ft ., 1. 1/2 Megabyte P18P't0ry board . I 0 On. Board RAM First 2 Megabyte address space l 112ft. l 1/2 MB 2" 0 second 2 r1egat1yte aaaress space Slot.4 - l·MB 1ft 21'1 Slot s - 1 re 3 Megabyte PM!P10ry boeJrd 0 First 2 ME~yte On Board RAM address space 2ft 0 3 rve . second 2 Mtag&Dyte lJt ~SS ~;pace 31 Slots 4&5 are the old · mtnory card locations Slot 4a5 - 1 MB (Slot stlected by st.It.us bitt J/14183 en 1.75· ~emery Allocation " .. •5"ota1 • Address ~ V.irt.u4l Addnss Spece Seoftent o.. 32 .. 64 .. 96 Se~ne…