--- np2/i286a/i286a_fe.s 2003/12/17 03:46:27 1.1 +++ np2/i286a/i286a_fe.s 2003/12/17 10:41:06 1.2 @@ -4,18 +4,19 @@ IMPORT _szpcflag8 IMPORT i286a_ea + IMPORT i286a_a IMPORT i286_memoryread IMPORT i286_memoryread_w IMPORT i286_memorywrite IMPORT i286_memorywrite_w + IMPORT i286a_localint - EXPORT i286a_0xfe - EXPORT i286a_0xff + EXPORT i286aopfe + EXPORT i286aopff AREA .text, CODE, READONLY - -i286a_0xfe GETPC8 +i286aopfe GETPC8 tst r0, #(1 << 3) bne decea8 @@ -68,14 +69,17 @@ dec8e mov r5, r0 ; ---- -i286a_0xff GETPC8 +i286aopff GETPC8 and r12, r0, #(7 << 3) adr r1, opefftbl ldr pc, [r1, r12 lsr #1] opefftbl dcd incea16 dcd decea16 - + dcd callea16 + dcd callfarea16 + dcd jmpea16 + dcd jmpfarea16 dcd pushea16 dcd popea16 @@ -129,6 +133,102 @@ dec16e mov r5, r0 mov lr, r11 b i286_memorywrite_w +callea16 cmp r0, #&c0 + bcc call16m + CPUWORK #7 + R16SRC r0, r5 + ldrh r0, [r5, #CPU_REG] + mov r1, r8 lsr #16 + sub r8, r8, r1 lsl #16 + orr r8, r8, r0 lsl #16 + b call16e +call16m CPUWORK #11 + bl i286a_ea + bl i286_memoryread_w + mov r1, r8 lsr #16 + sub r8, r8, r1 lsl #16 + orr r8, r8, r0 lsl #16 +call16e ldrh r2, [r9, #CPU_SP] + ldr r3, [r9, #CPU_SS_BASE] + subs r2, r2, #2 + addcc r2, r2, #&10000 + strh r2, [r9, #CPU_SP] + add r0, r2, r3 + mov lr, r11 + b i286_memorywrite_w + +callfarea16 cmp r0, #&c0 + bcs callfar16r + CPUWORK #16 + bl i286a_a + add r4, r0, #2 + add r0, r0, r6 + bic r4, r4, #(1 << 16) + bl i286_memoryread_w + mov r5, r8 lsr #16 + sub r8, r8, r5 lsl #16 + orr r8, r8, r0 lsl #16 + add r0, r4, r6 + bl i286_memoryread_w + mov r2, r0 lsl #4 + ldrh r1, [r9, #CPU_CS] + strh r0, [r9, #CPU_CS] + str r2, [r9, #CPU_CS_BASE] + ldrh r4, [r9, #CPU_SP] + ldr r6, [r9, #CPU_SS_BASE] + subs r4, r4, #2 + addcc r4, r4, #&10000 + add r0, r4, r6 + bl i286_memorywrite_w + subs r4, r4, #2 + addcc r4, r4, #&10000 + add r0, r4, r6 + strh r3, [r9, #CPU_SP] + mov r1, r5 + mov lr, r11 + b i286_memorywrite_w +callfar16r mov r6, #6 + sub r8, r8, #(2 << 16) + b i286a_localint + +jmpea16 cmp r0, #&c0 + bcc jmp16m + CPUWORK #7 + R16SRC r0, r5 + ldrh r0, [r5, #CPU_REG] + mov r8, r8 lsl #16 + mov r8, r8 lsr #16 + orr r8, r8, r0 lsl #16 + mov pc, r11 +jmp16m CPUWORK #11 + bl i286a_ea + bl i286_memoryread_w + mov r8, r8 lsl #16 + mov r8, r8 lsr #16 + orr r8, r8, r0 lsl #16 + mov pc, r11 + +jmpfarea16 cmp r0, #&c0 + bcs jmpfar16r + CPUWORK #11 + bl i286a_a + add r4, r0, #2 + add r0, r0, r6 + bic r4, r4, #(1 << 16) + bl i286_memoryread_w + mov r8, r8 lsl #16 + mov r8, r8 lsr #16 + orr r8, r8, r0 lsl #16 + add r0, r4, r6 + bl i286_memoryread_w + mov r1, r0 lsl #4 + strh r0, [r9, #CPU_CS] + str r1, [r9, #CPU_CS_BASE] + mov pc, r11 +jmpfar16r mov r6, #6 + sub r8, r8, #(2 << 16) + b i286a_localint + pushea16 cmp r0, #&c0 bcc push16m CPUWORK #3