mirror of
https://github.com/zellyn/go6502.git
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visual: port latest perfect6502 changes to go
This commit is contained in:
Zellyn Hunter
parent
8d286ae9cf
commit
3f33ff4257
32
visual/bitmap.go
Normal file
32
visual/bitmap.go
Normal file
@ -0,0 +1,32 @@
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package visual
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type bitmap []uint64
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const BITMAP_SHIFT = 6
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const BITMAP_MASK = 63
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func wordsForBits(bits uint) uint {
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return bits/64 + 1
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}
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func newBitmap(bits uint) bitmap {
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return make([]uint64, wordsForBits(bits))
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}
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func (b bitmap) clear() {
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for i := range b {
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b[i] = 0
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}
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}
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func (b bitmap) set(index uint, state bool) {
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if state {
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b[index>>BITMAP_SHIFT] |= 1 << (index & BITMAP_MASK)
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} else {
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b[index>>BITMAP_SHIFT] &^= 1 << (index & BITMAP_MASK)
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}
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}
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func (b bitmap) get(index uint) bool {
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return (b[index>>BITMAP_SHIFT]>>(index&BITMAP_MASK))&1 > 0
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}
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@ -11,12 +11,10 @@ package visual
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for original source material: www.visual6502.org
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*/
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const NODES = 1725
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// SegDefs defines the pullup status of a given segment (by index).
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// Those marked as "unused" are missing in the javascript equivalent
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// file, and set to 2 in the perfect6502 equivalent file.
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var SegDefs = [NODES]bool{
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var SegDefs = []bool{
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true, // 0
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false, // 1
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false, // 2
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@ -208,9 +208,7 @@ type TransDef struct {
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c2 uint // ...and drain nodes
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}
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const TRANSISTORS = 3510
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var TransDefs = [TRANSISTORS]TransDef{
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var TransDefs = []TransDef{
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{10, 176, NODE_vss},
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{1002, 1211, NODE_vss},
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{1002, 152, NODE_vss},
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645
visual/visual.go
645
visual/visual.go
@ -5,72 +5,88 @@ import (
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)
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type cpu struct {
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m icpu.Memory
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cycle uint64
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nodeValues []byte // Bitmask of node values (see const VAL_* below)
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nodeGates [][]uint // the list of transistor indexes attached to a node
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nodeC1C2s [][]uint // the list of transistor c1/c2s attached to a node
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nodeDependants [][]uint // all C1 and C2 nodes of transistors attached to a node
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m icpu.Memory
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cycle uint64
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transistorValues []bool
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nodes uint // number of nodes
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transistors uint // number of transistors
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listIn []uint
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listOut []uint
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vss uint
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vcc uint
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groupList []uint // list of node group membership
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groupSet [NODES/32 + 1]uint32 // quick check for node group membership
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groupValue byte // presence of vss/vcc/pulldown/pullup/hi in group
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nodesPullup bitmap
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nodesPulldown bitmap
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nodesValue bitmap
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nodeGates [][]uint // the list of transistor indexes attached to a node
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nodeC1C2s [][]uint // the list of transistor c1/c2s attached to a node
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nodeDependents [][]uint // all C1 and C2 nodes of transistors attached to a node
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nodeLeftDependents [][]uint // TODO(zellyn): doc
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transistorsGate []uint
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transistorsC1 []uint
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transistorsC2 []uint
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transistorsOn bitmap
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listIn []uint // the nodes we are working with
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listOut []uint // the indirect nodes we are collecting for the next run
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listOutBitmap bitmap
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group []uint
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groupBitmap bitmap
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groupContainsValue groupContains
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}
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// Bitfield for node values.
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type groupContains uint8
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const (
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VAL_HI = 1 << iota // We count on this being bit 0, so we can mask it out for 0 or 1.
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VAL_PULLUP
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VAL_PULLDOWN
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VAL_VCC
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VAL_VSS
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CONTAINS_NOTHING groupContains = iota
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CONTAINS_HI
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CONTAINS_PULLUP
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CONTAINS_PULLDOWN
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CONTAINS_VCC
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CONTAINS_VSS
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)
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// The lookup table for the group value. If vss is in the group, it's 0, vcc makes it 1, etc.
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// vss, vcc, pulldown, pullup, hi
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var GroupValues = [32]byte{
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0, // 00000 - nothing
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1, // 00001 - contains at least one hi node
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1, // 00010 - contains at least one pullup
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1, // 00011 - contains at least one pullup
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0, // 00100 - contains at least one pulldown
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0, // 00101 - contains at least one pulldown
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0, // 00110 - contains at least one pulldown
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0, // 00111 - contains at least one pulldown
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1, // 01000 - contains vcc
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1, // 01001 - contains vcc
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1, // 01010 - contains vcc
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1, // 01011 - contains vcc
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1, // 01100 - contains vcc
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1, // 01101 - contains vcc
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1, // 01110 - contains vcc
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1, // 01111 - contains vcc
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0, // 10000- contains vss
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0, // 10001- contains vss
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0, // 10010- contains vss
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0, // 10011- contains vss
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0, // 10100- contains vss
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0, // 10101- contains vss
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0, // 10110- contains vss
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0, // 10111- contains vss
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0, // 11000- contains vss
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0, // 11001- contains vss
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0, // 11010- contains vss
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0, // 11011- contains vss
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0, // 11100- contains vss
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0, // 11101- contains vss
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0, // 11110- contains vss
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0, // 11111- contains vss
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}
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// // The lookup table for the group value. If vss is in the group, it's 0, vcc makes it 1, etc.
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// // vss, vcc, pulldown, pullup, hi
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// var GroupValues = [32]byte{
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// 0, // 00000 - nothing
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// 1, // 00001 - contains at least one hi node
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// 1, // 00010 - contains at least one pullup
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// 1, // 00011 - contains at least one pullup
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// 0, // 00100 - contains at least one pulldown
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// 0, // 00101 - contains at least one pulldown
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// 0, // 00110 - contains at least one pulldown
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// 0, // 00111 - contains at least one pulldown
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// 1, // 01000 - contains vcc
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// 1, // 01001 - contains vcc
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// 1, // 01010 - contains vcc
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// 1, // 01011 - contains vcc
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// 1, // 01100 - contains vcc
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// 1, // 01101 - contains vcc
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// 1, // 01110 - contains vcc
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// 1, // 01111 - contains vcc
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// 0, // 10000- contains vss
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// 0, // 10001- contains vss
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// 0, // 10010- contains vss
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// 0, // 10011- contains vss
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// 0, // 10100- contains vss
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// 0, // 10101- contains vss
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// 0, // 10110- contains vss
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// 0, // 10111- contains vss
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// 0, // 11000- contains vss
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// 0, // 11001- contains vss
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// 0, // 11010- contains vss
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// 0, // 11011- contains vss
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// 0, // 11100- contains vss
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// 0, // 11101- contains vss
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// 0, // 11110- contains vss
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// 0, // 11111- contains vss
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// }
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func NewCPU(memory icpu.Memory) icpu.Cpu {
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c := cpu{m: memory}
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c.setupNodesAndTransistors()
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c.setupNodesAndTransistors(TransDefs, SegDefs, NODE_vss, NODE_vcc)
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return &c
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}
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@ -79,9 +95,9 @@ func (c *cpu) SetPC(uint16) {
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panic("Not implemented")
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}
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// --------------------------------
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// Interfacing and extracting state
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// --------------------------------
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/************************************/
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/* Interfacing and extracting state */
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/************************************/
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func (c *cpu) Read8(n0, n1, n2, n3, n4, n5, n6, n7 uint) byte {
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return (c.nodeBit(n0) | c.nodeBit(n1)<<1 | c.nodeBit(n2)<<2 | c.nodeBit(n3)<<3 |
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@ -136,7 +152,10 @@ func (c *cpu) PC() uint16 {
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}
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func (c *cpu) nodeBit(n uint) byte {
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return c.nodeValues[n] & VAL_HI // 1
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if c.getNodeValue(n) {
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return 1
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}
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return 0
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}
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func (c *cpu) writeDataBus(d byte) {
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@ -147,17 +166,6 @@ func (c *cpu) writeDataBus(d byte) {
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}
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func (c *cpu) Reset() {
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// All nodes down
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for i := range c.nodeValues {
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c.nodeValues[i] &^= VAL_HI
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}
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// All transistors off
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for i := range c.transistorValues {
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c.transistorValues[i] = false
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}
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c.setNode(NODE_res, false)
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c.setNode(NODE_clk0, true)
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c.setNode(NODE_rdy, true)
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@ -165,7 +173,7 @@ func (c *cpu) Reset() {
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c.setNode(NODE_irq, true)
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c.setNode(NODE_nmi, true)
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c.recalcAllNodes()
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c.stabilizeChip()
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// Hold RESET for 8 cycles
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for i := 0; i < 8; i++ {
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@ -173,148 +181,11 @@ func (c *cpu) Reset() {
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}
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c.setNode(NODE_res, true)
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c.recalcNodeList()
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c.cycle = 0
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}
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func (c *cpu) switchLists() {
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c.listIn, c.listOut = c.listOut, c.listIn
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}
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func (c *cpu) addNodeToGroup(n uint) {
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index := n >> 5
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mask := uint32(1 << (n & 0x1f))
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if c.groupSet[index]&mask > 0 {
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return
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}
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c.groupSet[index] |= mask
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c.groupList = append(c.groupList, n)
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c.groupValue |= c.nodeValues[n]
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if n == NODE_vss || n == NODE_vcc {
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return
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}
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/* revisit all transistors that are controlled by this node */
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for _, tn := range c.nodeC1C2s[n] {
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if c.transistorValues[tn] {
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if TransDefs[tn].c1 == n {
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c.addNodeToGroup(TransDefs[tn].c2)
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} else {
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c.addNodeToGroup(TransDefs[tn].c1)
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}
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}
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}
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}
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func (c *cpu) addAllNodesToGroup(node uint) {
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c.groupList = c.groupList[0:0]
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c.groupValue = 0
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c.addNodeToGroup(node)
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}
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func (c *cpu) recalcNode(node uint) {
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/*
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* get all nodes that are connected through
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* transistors, starting with this one
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*/
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c.addAllNodesToGroup(node)
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/* get the state of the group */
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newv := GroupValues[c.groupValue]
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/*
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* - set all nodes to the group state
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* - check all transistors switched by nodes of the group
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* - collect all nodes behind toggled transistors
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* for the next run
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*/
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for _, nn := range c.groupList {
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c.groupSet[nn>>5] = 0 // Clear as we go
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if c.nodeValues[nn]&VAL_HI != newv {
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c.nodeValues[nn] ^= VAL_HI
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for _, tn := range c.nodeGates[nn] {
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c.transistorValues[tn] = !c.transistorValues[tn]
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}
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c.listOut = append(c.listOut, nn)
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}
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}
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}
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func (c *cpu) recalcNodeList(nodes []uint) {
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c.listOut = c.listOut[0:0]
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for _, n := range nodes {
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c.recalcNode(n)
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}
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c.switchLists()
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for j := 0; j < 100; j++ { /* loop limiter */
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if len(c.listIn) == 0 {
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break
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}
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c.listOut = c.listOut[0:0]
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/*
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* for all nodes, follow their paths through
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* turned-on transistors, find the state of the
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* path and assign it to all nodes, and re-evaluate
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* all transistors controlled by this path, collecting
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* all nodes that changed because of it for the next run
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*/
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for _, n := range c.listIn {
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for _, d := range c.nodeDependants[n] {
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c.recalcNode(d)
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}
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}
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/*
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* make the secondary list our primary list, use
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* the data storage of the primary list as the
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* secondary list
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*/
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c.switchLists()
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}
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}
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func (c *cpu) recalcAllNodes() {
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temp := make([]uint, NODES)
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for i := uint(0); i < NODES; i++ {
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temp[i] = i
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}
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c.recalcNodeList(temp)
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}
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/**************/
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/* Node State */
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/**************/
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// So we don't have to keep re-allocating
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var oneNode = []uint{0}
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func (c *cpu) setNode(nn uint, state bool) {
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oldState := c.nodeValues[nn]
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newState := oldState
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if state {
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newState &^= VAL_PULLDOWN
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newState |= VAL_PULLUP
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} else {
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newState &^= VAL_PULLUP
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newState |= VAL_PULLDOWN
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}
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if newState != oldState {
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c.nodeValues[nn] = newState
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oneNode[0] = nn
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c.recalcNodeList(oneNode)
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}
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}
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func (c *cpu) isNodeHigh(n uint) bool {
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return c.nodeValues[n]&VAL_HI > 0
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}
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// handleMemory is called when clk0 is low, and either reads from or
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// writes to memory, depending on rw.
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func (c *cpu) handleMemory() {
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@ -328,7 +199,9 @@ func (c *cpu) handleMemory() {
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// HalfStep is the main clock loop, and takes a half clock step.
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func (c *cpu) HalfStep() {
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clk := c.isNodeHigh(NODE_clk0)
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/* invert clock */
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c.setNode(NODE_clk0, !clk)
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c.recalcNodeList()
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if !clk {
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c.handleMemory()
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@ -343,54 +216,324 @@ func (c *cpu) Step() error {
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return nil
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}
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/************************/
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/* Algorithms for Nodes */
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/************************/
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/*
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* The "value" propertiy of VCC and GND is never evaluated in the code,
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* so we don't bother initializing it properly or special-casing writes.
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*/
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func (c *cpu) setNodePullup(t uint, s bool) {
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c.nodesPullup.set(t, s)
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}
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func (c *cpu) getNodePullup(t uint) bool {
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return c.nodesPullup.get(t)
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}
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func (c *cpu) setNodePulldown(t uint, s bool) {
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c.nodesPulldown.set(t, s)
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}
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func (c *cpu) getNodePulldown(t uint) bool {
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return c.nodesPulldown.get(t)
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}
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func (c *cpu) setNodeValue(t uint, s bool) {
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c.nodesValue.set(t, s)
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}
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func (c *cpu) getNodeValue(t uint) bool {
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return c.nodesValue.get(t)
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}
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/******************************/
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/* Algorithms for Transistors */
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/******************************/
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func (c *cpu) setTransistorOn(t uint, s bool) {
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c.transistorsOn.set(t, s)
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}
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func (c *cpu) getTransistorOn(t uint) bool {
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return c.transistorsOn.get(t)
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}
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/************************/
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/* Algorithms for Lists */
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/************************/
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func (c *cpu) switchLists() {
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c.listIn, c.listOut = c.listOut, c.listIn
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}
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func (c *cpu) clearListOut() {
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c.listOut = c.listOut[:0]
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c.listOutBitmap.clear()
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}
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func (c *cpu) listOutAdd(i uint) {
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if !c.listOutBitmap.get(i) {
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c.listOut = append(c.listOut, i)
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c.listOutBitmap.set(i, true)
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}
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}
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/**********************************/
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/* Algorithms for Groups of Nodes */
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/**********************************/
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/*
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* a group is a set of connected nodes, which consequently
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* share the same value
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*
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* we use an array and a count for O(1) insert and
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* iteration, and a redundant bitmap for O(1) lookup
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*/
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func (c *cpu) groupClear() {
|
||||
c.group = c.group[:0]
|
||||
c.groupBitmap.clear()
|
||||
}
|
||||
|
||||
func (c *cpu) groupAdd(i uint) {
|
||||
c.group = append(c.group, i)
|
||||
c.groupBitmap.set(i, true)
|
||||
}
|
||||
|
||||
func (c *cpu) groupContains(el uint) bool {
|
||||
return c.groupBitmap.get(el)
|
||||
}
|
||||
|
||||
func (c *cpu) groupCount() uint {
|
||||
return uint(len(c.group))
|
||||
}
|
||||
|
||||
/*********************************/
|
||||
/* Node and Transistor Emulation */
|
||||
/*********************************/
|
||||
|
||||
func (c *cpu) addNodeToGroup(n uint) {
|
||||
/*
|
||||
* We need to stop at vss and vcc, otherwise we'll revisit other groups
|
||||
* with the same value - just because they all derive their value from
|
||||
* the fact that they are connected to vcc or vss.
|
||||
*/
|
||||
|
||||
if n == c.vss {
|
||||
c.groupContainsValue = CONTAINS_VSS
|
||||
return
|
||||
}
|
||||
|
||||
if n == c.vcc {
|
||||
if c.groupContainsValue != CONTAINS_VSS {
|
||||
c.groupContainsValue = CONTAINS_VCC
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
if c.groupContains(n) {
|
||||
return
|
||||
}
|
||||
|
||||
c.groupAdd(n)
|
||||
|
||||
if c.groupContainsValue < CONTAINS_PULLDOWN && c.getNodePulldown(n) {
|
||||
c.groupContainsValue = CONTAINS_PULLDOWN
|
||||
}
|
||||
|
||||
if c.groupContainsValue < CONTAINS_PULLUP && c.getNodePullup(n) {
|
||||
c.groupContainsValue = CONTAINS_PULLUP
|
||||
}
|
||||
|
||||
if c.groupContainsValue < CONTAINS_HI && c.getNodeValue(n) {
|
||||
c.groupContainsValue = CONTAINS_HI
|
||||
}
|
||||
|
||||
/* revisit all transistors that control this node */
|
||||
for _, tn := range c.nodeC1C2s[n] {
|
||||
/* if the transistor connects c1 and c2... */
|
||||
if c.getTransistorOn(uint(tn)) {
|
||||
/* if original node was connected to c1, continue with c2 */
|
||||
if c.transistorsC1[tn] == n {
|
||||
c.addNodeToGroup(c.transistorsC2[tn])
|
||||
} else {
|
||||
c.addNodeToGroup(c.transistorsC1[tn])
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (c *cpu) addAllNodesToGroup(node uint) {
|
||||
c.groupClear()
|
||||
c.groupContainsValue = CONTAINS_NOTHING
|
||||
c.addNodeToGroup(node)
|
||||
}
|
||||
|
||||
func (c *cpu) getGroupValue() bool {
|
||||
switch c.groupContainsValue {
|
||||
case CONTAINS_VCC, CONTAINS_PULLUP, CONTAINS_HI:
|
||||
return true
|
||||
case CONTAINS_VSS, CONTAINS_PULLDOWN, CONTAINS_NOTHING:
|
||||
return false
|
||||
}
|
||||
panic("cannot get here")
|
||||
}
|
||||
|
||||
func (c *cpu) recalcNode(node uint) {
|
||||
/*
|
||||
* get all nodes that are connected through
|
||||
* transistors, starting with this one
|
||||
*/
|
||||
c.addAllNodesToGroup(node)
|
||||
|
||||
/* get the state of the group */
|
||||
newv := c.getGroupValue()
|
||||
|
||||
/*
|
||||
* - set all nodes to the group state
|
||||
* - check all transistors switched by nodes of the group
|
||||
* - collect all nodes behind toggled transistors
|
||||
* for the next run
|
||||
*/
|
||||
for _, nn := range c.group {
|
||||
if c.getNodeValue(nn) != newv {
|
||||
c.setNodeValue(nn, newv)
|
||||
for _, tn := range c.nodeGates[nn] {
|
||||
c.setTransistorOn(tn, newv)
|
||||
}
|
||||
|
||||
if newv {
|
||||
for _, dp := range c.nodeLeftDependents[nn] {
|
||||
c.listOutAdd(dp)
|
||||
}
|
||||
} else {
|
||||
for _, dp := range c.nodeDependents[nn] {
|
||||
c.listOutAdd(dp)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func (c *cpu) recalcNodeList() {
|
||||
for j := 0; j < 100; j++ { /* loop limiter */
|
||||
/*
|
||||
* make the secondary list our primary list, use
|
||||
* the data storage of the primary list as the
|
||||
* secondary list
|
||||
*/
|
||||
c.switchLists()
|
||||
|
||||
if len(c.listIn) == 0 {
|
||||
break
|
||||
}
|
||||
|
||||
c.clearListOut()
|
||||
|
||||
/*
|
||||
* for all nodes, follow their paths through
|
||||
* turned-on transistors, find the state of the
|
||||
* path and assign it to all nodes, and re-evaluate
|
||||
* all transistors controlled by this path, collecting
|
||||
* all nodes that changed because of it for the next run
|
||||
*/
|
||||
for _, n := range c.listIn {
|
||||
c.recalcNode(n)
|
||||
}
|
||||
}
|
||||
c.clearListOut()
|
||||
}
|
||||
|
||||
/******************/
|
||||
/* Initialization */
|
||||
/******************/
|
||||
|
||||
func (c *cpu) addNodeDependant(a, b uint) {
|
||||
for _, d := range c.nodeDependants[a] {
|
||||
if b == d {
|
||||
func (c *cpu) addNodeDependent(a uint, b uint) {
|
||||
for _, dp := range c.nodeDependents[a] {
|
||||
if dp == b {
|
||||
return
|
||||
}
|
||||
}
|
||||
c.nodeDependants[a] = append(c.nodeDependants[a], b)
|
||||
c.nodeDependents[a] = append(c.nodeDependents[a], b)
|
||||
}
|
||||
|
||||
func (c *cpu) setupNodesAndTransistors() {
|
||||
|
||||
// Zero out bitsets
|
||||
c.transistorValues = make([]bool, TRANSISTORS)
|
||||
c.groupList = make([]uint, 0, NODES)
|
||||
c.nodeValues = make([]byte, NODES)
|
||||
c.nodeGates = make([][]uint, NODES)
|
||||
c.nodeC1C2s = make([][]uint, NODES)
|
||||
c.nodeDependants = make([][]uint, NODES)
|
||||
|
||||
// Copy node data from SegDefs into r/w data structures
|
||||
for i := uint(0); i < NODES; i++ {
|
||||
if SegDefs[i] {
|
||||
c.nodeValues[i] = VAL_PULLUP
|
||||
func (c *cpu) addNodeLeftDependent(a uint, b uint) {
|
||||
for _, dp := range c.nodeLeftDependents[a] {
|
||||
if dp == b {
|
||||
return
|
||||
}
|
||||
if i == NODE_vss {
|
||||
c.nodeValues[i] |= VAL_VSS
|
||||
}
|
||||
c.nodeLeftDependents[a] = append(c.nodeLeftDependents[a], b)
|
||||
}
|
||||
|
||||
func (c *cpu) setupNodesAndTransistors(transDefs []TransDef, nodeIsPullup []bool, vss uint, vcc uint) {
|
||||
c.nodes = uint(len(nodeIsPullup))
|
||||
c.transistors = uint(len(transDefs))
|
||||
c.vss = vss
|
||||
c.vcc = vcc
|
||||
c.nodesPullup = newBitmap(c.nodes)
|
||||
c.nodesPulldown = newBitmap(c.nodes)
|
||||
c.nodesValue = newBitmap(c.nodes)
|
||||
|
||||
c.transistorsOn = newBitmap(c.transistors)
|
||||
c.listOutBitmap = newBitmap(c.nodes)
|
||||
c.groupBitmap = newBitmap(c.nodes)
|
||||
|
||||
c.nodeGates = make([][]uint, c.transistors)
|
||||
c.nodeC1C2s = make([][]uint, c.transistors)
|
||||
c.nodeDependents = make([][]uint, c.nodes, c.nodes)
|
||||
c.nodeLeftDependents = make([][]uint, c.nodes, c.nodes)
|
||||
|
||||
/* copy nodes into r/w data structure */
|
||||
for i, isPullup := range nodeIsPullup {
|
||||
c.setNodePullup(uint(i), isPullup)
|
||||
}
|
||||
|
||||
/* copy transistors into r/w data structure */
|
||||
for _, transDef := range transDefs {
|
||||
found := false
|
||||
for j2, gate := range c.transistorsGate {
|
||||
if gate == transDef.gate &&
|
||||
((c.transistorsC1[j2] == transDef.c1 && c.transistorsC2[j2] == transDef.c2) ||
|
||||
(c.transistorsC1[j2] == transDef.c2 && c.transistorsC2[j2] == transDef.c1)) {
|
||||
found = true
|
||||
break
|
||||
}
|
||||
}
|
||||
if i == NODE_vcc {
|
||||
c.nodeValues[i] |= VAL_VCC
|
||||
if !found {
|
||||
c.transistorsGate = append(c.transistorsGate, transDef.gate)
|
||||
c.transistorsC1 = append(c.transistorsC1, transDef.c1)
|
||||
c.transistorsC2 = append(c.transistorsC2, transDef.c2)
|
||||
}
|
||||
}
|
||||
|
||||
// Cross-reference transistors in nodes data structures
|
||||
for j, t := range TransDefs {
|
||||
i := uint(j)
|
||||
c.nodeGates[t.gate] = append(c.nodeGates[t.gate], i)
|
||||
c.nodeC1C2s[t.c1] = append(c.nodeC1C2s[t.c1], i)
|
||||
c.nodeC1C2s[t.c2] = append(c.nodeC1C2s[t.c2], i)
|
||||
/* cross reference transistors in nodes data structures */
|
||||
for i, gate := range c.transistorsGate {
|
||||
c1 := c.transistorsC1[i]
|
||||
c2 := c.transistorsC2[i]
|
||||
c.nodeGates[gate] = append(c.nodeGates[gate], uint(i))
|
||||
c.nodeC1C2s[c1] = append(c.nodeC1C2s[c1], uint(i))
|
||||
c.nodeC1C2s[c2] = append(c.nodeC1C2s[c2], uint(i))
|
||||
}
|
||||
|
||||
for i := uint(0); i < NODES; i++ {
|
||||
for i := uint(0); i < c.nodes; i++ {
|
||||
for _, t := range c.nodeGates[i] {
|
||||
c.addNodeDependant(i, TransDefs[t].c1)
|
||||
c.addNodeDependant(i, TransDefs[t].c2)
|
||||
c1 := c.transistorsC1[t]
|
||||
if c1 != vss && c1 != vcc {
|
||||
c.addNodeDependent(i, c1)
|
||||
}
|
||||
c2 := c.transistorsC2[t]
|
||||
if c2 != vss && c2 != vcc {
|
||||
c.addNodeDependent(i, c2)
|
||||
}
|
||||
if c1 != vss && c1 != vcc {
|
||||
c.addNodeLeftDependent(i, c1)
|
||||
} else {
|
||||
c.addNodeLeftDependent(i, c2)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -398,3 +541,25 @@ func (c *cpu) setupNodesAndTransistors() {
|
||||
func (c *cpu) Print(bool) {
|
||||
panic("not implemented")
|
||||
}
|
||||
|
||||
func (c *cpu) stabilizeChip() {
|
||||
for i := uint(0); i < c.nodes; i++ {
|
||||
c.listOutAdd(i)
|
||||
}
|
||||
c.recalcNodeList()
|
||||
}
|
||||
|
||||
/**************/
|
||||
/* Node State */
|
||||
/**************/
|
||||
|
||||
func (c *cpu) setNode(nn uint, s bool) {
|
||||
c.setNodePullup(nn, s)
|
||||
c.setNodePulldown(nn, !s)
|
||||
c.listOutAdd(nn)
|
||||
c.recalcNodeList()
|
||||
}
|
||||
|
||||
func (c *cpu) isNodeHigh(nn uint) bool {
|
||||
return c.getNodeValue(nn)
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user