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added REC pinout info to library

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git-svn-id: https://svn.code.sf.net/p/acme-crossass/code-0/trunk@377 4df02467-bbd4-4a76-a152-e7ce94205b78
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marcobaye 2024-07-27 16:08:47 +00:00
parent 3818f97723
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ACME_Lib/cbm/c64/reu.a
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@ -65,3 +65,54 @@ rec_ADDRCTRL_FIX_EXT = %.#......
; $df0b..$df1f always read as $ff, ; $df0b..$df1f always read as $ff,
; at $df20 the registers repeat. ; at $df20 the registers repeat.
; these "32 registers" are visible 8 times in the $df00 page. ; these "32 registers" are visible 8 times in the $df00 page.
; The REC is labeled "MOS 8726R1" and was available as a giant (64-pin) DIP
; version and as a 68-pin quad-pack version. Both packages seem to contain the
; same die, but because of the different number of pins, they are bonded
; slightly differently.
; Pinouts:
;
; DIP version
; ____ ____ /reset 1
; | V | /irq 2 | 68 n.c.
; /reset | 1 64 | vcc dotclk 3 \ | / 67 vcc
; /irq | 2 63 | bs r/w 4 \ \ | / / 66 bs
; dotclk | 3 62 | /cas1 1 MHz 5 \ \ \ | / / / 65 /cas1
; r/w | 4 61 | /cas0 /cs 6 \ \ \ \ | / / / / 64 /cas0
; 1 MHz | 5 60 | /ras1 /ba 7 \ \ \ \ \ | / / / / / 63 /ras1
; /cs | 6 59 | /ras0 /dma 8 \ \ \ \ \ \ | / / / / / / 62 /ras0
; /ba | 7 58 | /dwe d7 9 \ \ \ \ \ \ \ | / / / / / / / 61 /dwe
; /dma | 8 57 | dd0 \_\_\_\_\_\_\_\_|_/_/_/_/_/_/_/_/
; d7 | 9 56 | dd1 d6 10| o |60 dd0
; d6 | 10 55 | dd2 d5 11| |59 dd1
; d5 | 11 54 | dd3 d4 12| |58 dd2
; d4 | 12 53 | dd4 d3 13| |57 dd3
; d3 | 13 52 | dd5 d2 14| |56 dd4
; d2 | 14 51 | dd6 d1 15| |55 dd5
; d1 | 15 50 | dd7 d0 16| |54 dd6
; d0 | 16 49 | vss n.c. 17| quad pack |53 dd7
; vss | 17 48 | ma8 vss 18| |52 vss
; a15 | 18 47 | ma7 a15 19| version |51 n.c.
; a14 | 19 46 | ma6 a14 20| |50 ma8
; a13 | 20 45 | ma5 a13 21| |49 ma7
; a12 | 21 44 | ma4 a12 22| |48 ma6
; a11 | 22 43 | ma3 a11 23| |47 ma5
; a10 | 23 42 | ma2 a10 24| |46 ma4
; a9 | 24 41 | ma1 a9 25| |45 ma3
; a8 | 25 40 | ma0 a8 26|_________________________________|44 ma2
; a7 | 26 39 | test / / / / / / / / | \ \ \ \ \ \ \ \
; a6 | 27 38 | vss a7 27 / / / / / / / | \ \ \ \ \ \ \ 43 ma1
; a5 | 28 37 | vcc a6 28 / / / / / / | \ \ \ \ \ \ 42 ma0
; a4 | 29 36 | /romsel a5 29 / / / / / | \ \ \ \ \ 41 n.c.
; a3 | 30 35 | /roml a4 30 / / / / | \ \ \ \ 40 test
; a2 | 31 34 | /romh a3 31 / / / | \ \ \ 39 vss
; a1 | 32 33 | a0 a2 32 / / | \ \ 38 vcc
; |_________| a1 33 / | \ 37 /romsel
; a0 34 | 36 /roml
; 35 /romh
;
; Basically, half of the pins (the low numbers) are for talking to the c64/c128
; and the other half (the high numbers) are for talking to the REU's own RAM.
; "/romh", "/roml" and "/romsel" are just the inputs and the output of a simple
; AND gate, the result is used to select the EPROM socket.