System Specification for C65 | Fred Bowen | March 1, 1991 |
Signal | "VMF" | "CDF" | "BMF" | "BPF" | "RF" | "SPF" | "SDF" | "DAT" | "COL" |
---|---|---|---|---|---|---|---|---|---|
IA0 | VC0 | RC0 | RC0 | RC0 | RF0 | SF0 | SD0 | DT0 | A0 |
IA1 | VC1 | RC1 | RC1 | RC1 | RF1 | SF1 | SD1 | DT1 | A1 |
IA2 | VC2 | RC2 | RC2 | RC2 | RF2 | SF2 | SD2 | DT2 | A2 |
IA3 | VC3 | D0 | VC0 | VC0 | RF3 | 1 | SD3 | DT3 | A3 |
IA4 | VC4 | D1 | VC1 | VC1 | RF4 | 1 | SD4 | DT4 | A4 |
IA5 | VC5 | D2 | VC2 | VC2 | 1 | 1 | SD5 | DT5 | A5 |
IA6 | VC6 | D3 | VC3 | VC3 | 1 | 1 | D0 | DT6 | A6 |
IA7 | VC7 | D4 | VC4 | VC4 | 1 | 1 | D1 | DT7 | A7 |
IA8 | VC8 | D5 | VC5 | VC5 | 1 | 1 | D2 | DT8 | A8 |
IA9 | VC9 | D6 | VC6 | VC6 | 1 | 1 | D3 | DT9 | A9 |
IA10 | VMO/VC10 | D7 | VC7 | VC7 | RF5 | VM0/1 | D4 | DT10 | A10 |
IA11 | VM1 | CBO | VC8 | VC8 | RF6 | VM1 | D5 | DT11 | 1 |
IA12 | VM2 | CB1 | VC9 | VC9 | RF7 | VM2 | D6 | DT12 | 1 |
IA13 | VM3 | CB2 | CB2/VC10 | BE13/VC10 | 1 | VM3 | D7 | BE13/DT13 | 1 |
IA14 | VBO | VB0 | VB0 | BE14 | 1 | VB0 | VB0 | BE14 | 1 |
IA15 | VB1 | VB1 | VB1 | BE15 | 1 | VB1 | VB1 | BE15 | 1 |
IA16 | A16 | A16 | A16 | A16 | RF8 | A16 | A16 | DT16 | 1 |
IB10 | 0/* | * | * | * | * | * | * | * | * |
IB11 | 1 | * | * | * | * | * | * | * | 1 |
IB12 | 1 | * | * | * | * | * | * | * | 1 |
IB13 | 1 | * | * | BO13/* | * | * | * | BO13/* | 1 |
IB14 | 1 | * | * | BO14 | * | * | * | BO14 | 1 |
IB15 | 1 | * | * | BO15 | * | * | * | BO15 | 1 |
DMA | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 |
Legend :
VC = Video-Matrix Counter
RC = Row Counter
VM = Video Matrix Address
VB = Video Bank Address
CB = Character Generator Bank Address
RF = Refresh Counter
SF = Sprite Pointer Fetch Counter
SD = Sprite Data Fetch Counter
DT = Display Address Translator
BE = Bitplane Even Pointer
BO = Bitplane Odd Pointer
A = Address Out = Address in
D = Data fetched from previous fetch
* = "B" bus contents, same as "A" bus
xxx/yyy = contents for 320/640 pixel modes
This page has been created by Sami Rautiainen. | |
Read the small print. | Last updated March 24, 2003. |