X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=z80comp2;a=blobdiff_plain;f=glue.pld;fp=glue.pld;h=0000000000000000000000000000000000000000;hp=059e8e1ddae0d5a23ba6d916c7115bebe7059a65;hb=a0a85eb847ff3bb5da13e78618efdcd1b9f588cf;hpb=b55f31d1ac4a1991f2ad7b2d17be06969ea25e47 diff --git a/glue.pld b/glue.pld deleted file mode 100644 index 059e8e1..0000000 --- a/glue.pld +++ /dev/null @@ -1,19 +0,0 @@ -GAL16V8 -gluez80 - -A4 A5 A6 A7 A15 NC M1 MREQ IOREQ GND -RFSH RD WR NC /IACK UARTENP /UARTEN /RAMEN /ROMEN VCC - -ROMEN = /MREQ * RFSH * /A15 -RAMEN = /MREQ * RFSH * A15 -UARTEN = /IOREQ*M1*/A7*/A6*/A5*/A4*/RD + /IOREQ*M1*/A7*/A6*/A5*/A4*/WR -UARTENP = /IOREQ*M1*/A7*/A6*/A5*/A4*/RD + /IOREQ*M1*/A7*/A6*/A5*/A4*/WR -IACK = /IOREQ * /M1 - -DESCRIPTION -Z80 computer 2 glue logic and address decoding -/ROMEN enables the ROM for memory cycles from 0000h to 0fffh -/RAMEN enables the RAM for memory cycles from 1000h to ffffh -/UARTEN enables the DUART for I/O cycles from port 0 to 15 -UARTENP is the negation of /UARTEN, needed for the DUART wait state logic -/IACK signifies an interrupt acknowledge cycle