From: Bernard Blackham <dagobah@ucc.asn.au>
Date: Sun, 3 Aug 2003 09:25:10 +0000 (+0000)
Subject: more findings
X-Git-Tag: ROMW~121
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=1280dd70385136da88e04c95f937b8aee5f55c2f;p=uccvend-snackrom.git

more findings
---

diff --git a/ROM-2003/vend.asm b/ROM-2003/vend.asm
index 70e215b..c87edec 100644
--- a/ROM-2003/vend.asm
+++ b/ROM-2003/vend.asm
@@ -32,6 +32,8 @@
 ;0035   only ever contains #1e
 ;003b   commonly contains $0233
 ;003d
+;003e   mask for 0040? (see f996)
+;003f
 ;0040   
 ;0042   current key press
 ;0048   error status 
@@ -47,6 +49,8 @@
 ;0076-0077 word
 ;007f   
 ;00c8   
+;0800   motor information array - each is a 16-bit value
+;         
 ;08c8   array of prices of each slot??
 ;0993   custom message?
 ;0b90 - 0b99 display buffer (backwards)
@@ -67,6 +71,20 @@
 ;         bit5: bad sensor
 ;         bit6: tube error
 ;0bc2 - 0bce SCI read into these locations
+;0bd
+;0bc4   array index into 0bc7
+;0bc5
+;0bc6   another array index into 0bc7
+;0bc7 word array
+;
+;0be1
+;0bd7   init'd to 0x01
+;0bd8   init'd to 0x04
+;0bd9   init'd to 0x02
+;0bda   init'd to 0x20
+;0bdb   init'd to 0x08
+;0bdc   init'd to 0x10
+;
 ;0cbc   serial number
 ;0ccc   machine ID
 ;0cd9   counter of something - reset to 4 on some serial input
@@ -189,7 +207,7 @@
 ; PE6 <unused>
 ; PE5 <unused>
 ; PE4 <unused>
-; PE3 goes high when 24VUN line is too low
+; PE3 goes high when 24VUN line is *really* low (like 20V)
 ; PE2 remote no-sale switch (active low)
 ; PE1 motor overvoltage sense (active high)
 ; PE0 motor overcurrent sense (active low)
@@ -9954,6 +9972,7 @@ CE46 31              1     ins
 CE47 3B              ;     rti 
 
 jump48:
+; 
 CE48 F6 0B C4        ...   ldab 0bc4
 CE4B F1 0B C5        ...   cmpb 0bc5
 CE4E 25 53           %S    bcs 53
@@ -9993,7 +10012,7 @@ CE96 C6 08           ..    ldab #08
 CE98 F7 0B DB        ...   stab 0bdb
 CE9B C6 10           ..    ldab #10
 CE9D F7 0B DC        ...   stab 0bdc
-CEA0 7E D0 66        ~.f   jmp d066		;goto58
+CEA0 7E D0 66        ~.f   jmp d066		;goto58 - multiply
 CEA3 F6 0B C4        ...   ldab 0bc4
 CEA6 F1 0B C6        ...   cmpb 0bc6
 CEA9 25 53           %S    bcs 53
@@ -10153,7 +10172,7 @@ D002 C6 20           .     ldab #20
 D004 F7 0B DB        ...   stab 0bdb
 D007 C6 08           ..    ldab #08
 D009 F7 0B DC        ...   stab 0bdc
-D00C 20 58            X    bra 58
+D00C 20 58            X    bra 58      ;goto58
 D00E F6 0B C6        ...   ldab 0bc6
 D011 F1 0B C5        ...   cmpb 0bc5
 D014 25 50           %P    bcs 50
@@ -10192,7 +10211,7 @@ D059 F7 0B DA        ...   stab 0bda
 D05C C6 08           ..    ldab #08
 D05E F7 0B DB        ...   stab 0bdb
 D061 C6 20           .     ldab #20
-D063 F7 0B DC        ...   stab 0bdc
+D063 F7 0B DC        ...   stab 0bdc   ;goto58
 goto58:
 D066 F6 0B AA        ...   ldab 0baa
 D069 4F              O     clra 
@@ -10739,9 +10758,10 @@ D478 39              9     rts
 
 jump67:
 D479 7F 00 1C        ...   clr 001c
+; begin loop
 D47C F6 00 1C        ...   ldab 001c
-D47F C1 64           .d    cmpb #64
-D481 24 1A           $.    bcc 1a
+D47F C1 64           .d    cmpb #64   ; to 100
+D481 24 1A           $.    bcc 1a     ; to d49d
 D483 CC FF 7F        ...   ldd #ff7f
 D486 37              7     pshb 
 D487 36              6     psha 
@@ -10755,9 +10775,9 @@ D492 A4 00           ..    anda 00,x
 D494 E4 01           ..    andb 01,x
 D496 ED 00           ..    std 00,x
 D498 7C 00 1C        |..   inc 001c
-D49B 20 DF            .    bra df
+D49B 20 DF            .    bra df  ; to d47c
 D49D 7F 00 05        ...   clr 0005
-goto65:
+goto65: ; begin motor count loop
 D4A0 F6 00 05        ...   ldab 0005
 D4A3 C1 50           .P    cmpb #50     ; 80
 D4A5 25 03           %.    bcs 03
@@ -10838,7 +10858,7 @@ D53D AA 00           ..    ora 00,x
 D53F EA 01           ..    orb 01,x
 D541 ED 00           ..    std 00,x
 D543 20 15            .    bra 15
-goto64:
+goto64: ; mark a motor position as valid?
 D545 CC 7F FF        ...   ldd #7fff
 D548 37              7     pshb 
 D549 36              6     psha 
@@ -10852,7 +10872,7 @@ D554 A4 00           ..    anda 00,x
 D556 E4 01           ..    andb 01,x
 D558 ED 00           ..    std 00,x
 D55A 7C 00 05        |..   inc 0005
-D55D 7E D4 A0        ~..   jmp d4a0		;goto65
+D55D 7E D4 A0        ~..   jmp d4a0		;goto65 - loop again
 goto63:
 D560 39              9     rts 
 
@@ -15238,6 +15258,7 @@ F8FE 0E              .     cli
 ;
 ; begin of main loop
 goto85:
+; test power lines
 F8FF BD E6 1B        ...   jsr e61b		;jump4 set 0031 to 10
 F902 BD D1 05        ...   jsr d105		;motors_off
 F905 F6 10 0A        ...   ldab 100a
@@ -15271,6 +15292,8 @@ F94A F7 30 00        .0.   stab 3000   ; clear send & reset lines
 F94D C6 1E           ..    ldab #1e
 F94F F7 00 35        ..5   stab 0035
 ;
+; end of power line test
+;
 F952 F6 0B C0        ...   ldab 0bc0
 F955 C4 08           ..    andb #08
 F957 27 16           '.    beq 16       ; to f96f
@@ -15285,7 +15308,7 @@ F969 CE 0B C1        ...   ldx #0bc1
 F96C 1C 00 08        ..    bset 00,x, #08 ; set bill error bit
 ;
 F96F F6 0B C1        ...   ldab 0bc1
-F972 C4 07           ..    andb #07     ; test for power failures
+F972 C4 07           ..    andb #07     ; was there a power failure?
 F974 27 0D           '.    beq 0d       ; to f983
 F976 F6 00 35        ..5   ldab 0035
 F979 26 08           &.    bne 08
@@ -15293,6 +15316,7 @@ F97B CE 00 21        ..!   ldx #0021
 F97E 1C 00 20        ..    bset 00,x, #20
 F981 20 06           ..    bra 06       ; to f989
 ;
+;
 F983 CE 00 21        ..!   ldx #0021
 F986 1D 00 20        ..    bclr 00,x, #20
 F989 BD BB 63         .    jsr bb63     ;jump200 - read the keypad